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conductivity</title> <meta name="description" content="Search results for: hydraulic conductivity"> <meta name="keywords" content="hydraulic conductivity"> <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no"> <meta charset="utf-8"> <link href="https://cdn.waset.org/favicon.ico" type="image/x-icon" rel="shortcut icon"> <link href="https://cdn.waset.org/static/plugins/bootstrap-4.2.1/css/bootstrap.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/plugins/fontawesome/css/all.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/css/site.css?v=150220211555" rel="stylesheet"> </head> <body> <header> <div class="container"> <nav class="navbar navbar-expand-lg navbar-light"> <a class="navbar-brand" href="https://waset.org"> <img src="https://cdn.waset.org/static/images/wasetc.png" alt="Open Science Research Excellence" title="Open Science Research Excellence" /> </a> <button class="d-block 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action="https://publications.waset.org/abstracts/search"> <div id="custom-search-input"> <div class="input-group"> <i class="fas fa-search"></i> <input type="text" class="search-query" name="q" placeholder="Author, Title, Abstract, Keywords" value="hydraulic conductivity"> <input type="submit" class="btn_search" value="Search"> </div> </div> </form> </div> </div> <div class="row mt-3"> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Commenced</strong> in January 2007</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Frequency:</strong> Monthly</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Edition:</strong> International</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Paper Count:</strong> 1698</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: hydraulic conductivity</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1698</span> Hydraulic Conductivity Prediction of Cement Stabilized Pavement Base Incorporating Recycled Plastics and Recycled Aggregates</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Md.%20Shams%20Razi%20Shopnil">Md. Shams Razi Shopnil</a>, <a href="https://publications.waset.org/abstracts/search?q=Tanvir%20Imtiaz"> Tanvir Imtiaz</a>, <a href="https://publications.waset.org/abstracts/search?q=Sabrina%20Mahjabin"> Sabrina Mahjabin</a>, <a href="https://publications.waset.org/abstracts/search?q=Md.%20Sahadat%20Hossain"> Md. Sahadat Hossain</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Saturated hydraulic conductivity is one of the most significant attributes of pavement base course. Determination of hydraulic conductivity is a routine procedure for regular aggregate base courses. However, in many cases, a cement-stabilized base course is used with compromised drainage ability. Traditional hydraulic conductivity testing procedure is a readily available option which leads to two consequential drawbacks, i.e., the time required for the specimen to be saturated and extruding the sample after completion of the laboratory test. To overcome these complications, this study aims at formulating an empirical approach to predicting hydraulic conductivity based on Unconfined Compressive Strength test results. To do so, this study comprises two separate experiments (Constant Head Permeability test and Unconfined Compressive Strength test) conducted concurrently on a specimen having the same physical credentials. Data obtained from the two experiments were then used to devise a correlation between hydraulic conductivity and unconfined compressive strength. This correlation in the form of a polynomial equation helps to predict the hydraulic conductivity of cement-treated pavement base course, bypassing the cumbrous process of traditional permeability and less commonly used horizontal permeability tests. The correlation was further corroborated by a different set of data, and it has been found that the derived polynomial equation is deemed to be a viable tool to predict hydraulic conductivity. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=hydraulic%20conductivity" title="hydraulic conductivity">hydraulic conductivity</a>, <a href="https://publications.waset.org/abstracts/search?q=unconfined%20compressive%20strength" title=" unconfined compressive strength"> unconfined compressive strength</a>, <a href="https://publications.waset.org/abstracts/search?q=recycled%20plastics" title=" recycled plastics"> recycled plastics</a>, <a href="https://publications.waset.org/abstracts/search?q=recycled%20concrete%20aggregates" title=" recycled concrete aggregates"> recycled concrete aggregates</a> </p> <a href="https://publications.waset.org/abstracts/163967/hydraulic-conductivity-prediction-of-cement-stabilized-pavement-base-incorporating-recycled-plastics-and-recycled-aggregates" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/163967.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">90</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1697</span> Prediction of Unsaturated Permeability Functions for Clayey Soil</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=F.%20Louati">F. Louati</a>, <a href="https://publications.waset.org/abstracts/search?q=H.%20Trabelsi"> H. Trabelsi</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Jamei"> M. Jamei</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Desiccation cracks following drainage-humidification cycles. With water loss, mainly due to evaporation, suction in the soil increases, producing volumetric shrinkage and tensile stress. When the tensile stress reaches tensile strength, the soil cracks. Desiccation cracks networks can directly control soil hydraulic properties. The aim of this study was for quantifying the hydraulic properties for examples the water retention curve, the saturated hydraulic conductivity, the unsaturated hydraulic conductivity function, the shrinkage dynamics in Tibar soil- clay soil in the Northern of Tunisia. Then a numerical simulation of unsaturated hydraulic properties for a crack network has been attempted. The finite elements code ‘CODE_BRIGHT’ can be used to follow the hydraulic distribution in cracked porous media. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=desiccation" title="desiccation">desiccation</a>, <a href="https://publications.waset.org/abstracts/search?q=cracks" title=" cracks"> cracks</a>, <a href="https://publications.waset.org/abstracts/search?q=permeability" title=" permeability"> permeability</a>, <a href="https://publications.waset.org/abstracts/search?q=unsaturated%20hydraulic%20flow" title=" unsaturated hydraulic flow"> unsaturated hydraulic flow</a>, <a href="https://publications.waset.org/abstracts/search?q=simulation" title=" simulation"> simulation</a> </p> <a href="https://publications.waset.org/abstracts/44245/prediction-of-unsaturated-permeability-functions-for-clayey-soil" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/44245.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">300</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1696</span> Estimation of Aquifer Parameters Using Vertical Electrical Sounding in Ochudo City, Abakaliki Urban Nigeria</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Moses.%20O.%20Eyankware">Moses. O. Eyankware</a>, <a href="https://publications.waset.org/abstracts/search?q=Benard%20I.%20Odoh"> Benard I. Odoh</a>, <a href="https://publications.waset.org/abstracts/search?q=Omoleomo%20O.%20Omo-Irabor"> Omoleomo O. Omo-Irabor</a>, <a href="https://publications.waset.org/abstracts/search?q=Alex%20O.%20I.%20Selemo"> Alex O. I. Selemo</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Knowledge of hydraulic conductivity and transmissivity is essential for the determination of natural water flow through an aquifer. These parameters are commonly estimated from the analysis of electrical conductivity, soil properties and fluid flow data. In order to achieve a faster and cost effective analysis of aquifer parameters in Ochudo City in Abakaliki, this study relied on non-invasive geophysical methods. As part of this approach, Vertical Electrical Sounding (VES) was conducted at 20 sites in the study area for the identification of the vertical variation in subsurface lithology and for the characterization of the groundwater system. The area variously consists of between five to seven geoelectric layers of different thicknesses. Depth to aquifer ranges from 9.94 m-134.0 m while the thickness of the identified aquifer varies between 8.43 m and 44.31 m. Based on the electrical conductivity values of water samples collected from two boreholes and two hand-dug wells within the study area, the hydraulic conductivity was determined to range from 0.10 to 0.433 m/day. The estimated thickness of the aquifer and calculated hydraulic conductivity were used to derive the aquifer transmissivity. The results indicate that this parameter ranges from 1.58-7.56 m²/day with a formation factor of between 0.31-3.6. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Asu%20river%20group" title="Asu river group">Asu river group</a>, <a href="https://publications.waset.org/abstracts/search?q=transmissivity" title=" transmissivity"> transmissivity</a>, <a href="https://publications.waset.org/abstracts/search?q=hydraulic%20conductivity" title=" hydraulic conductivity"> hydraulic conductivity</a>, <a href="https://publications.waset.org/abstracts/search?q=abakaliki" title=" abakaliki"> abakaliki</a>, <a href="https://publications.waset.org/abstracts/search?q=vertical%20electrical%20sounding%20%28VES%29" title=" vertical electrical sounding (VES)"> vertical electrical sounding (VES)</a> </p> <a href="https://publications.waset.org/abstracts/35836/estimation-of-aquifer-parameters-using-vertical-electrical-sounding-in-ochudo-city-abakaliki-urban-nigeria" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/35836.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">395</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1695</span> Evaluation on Mechanical Stabilities of Clay-Sand Mixtures Used as Engineered Barrier for Radioactive Waste Disposal</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ahmet%20E.%20Osmanlioglu">Ahmet E. Osmanlioglu</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this study, natural bentonite was used as natural clay material and samples were taken from the Kalecik district in Ankara. In this research, bentonite is the subject of an analysis from standpoint of assessing the basic properties of engineered barriers with respect to the buffer material. Bentonite and sand mixtures were prepared for tests. Some of clay minerals give relatively higher hydraulic conductivity and lower swelling pressure. Generally, hydraulic conductivity of these type clays is lower than <10-12 m/s. The hydraulic properties of clay-sand mixtures are evaluated to design engineered barrier specifications. Hydraulic conductivities of bentonite-sand mixture were found in the range of 1.2x10-10 to 9.3x10-10 m/s. Optimum B/S mixture ratio was determined as 35% in terms of hydraulic conductivity and mechanical stability. At the second stage of this study, all samples were compacted into cylindrical shape molds (diameter: 50 mm and length: 120 mm). The strength properties of compacted mixtures were better than the compacted bentonite. In addition, the larger content of the quartz sand in the mixture has the greater thermal conductivity. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=engineered%20barriers" title="engineered barriers">engineered barriers</a>, <a href="https://publications.waset.org/abstracts/search?q=mechanical%20stability" title=" mechanical stability"> mechanical stability</a>, <a href="https://publications.waset.org/abstracts/search?q=clay" title=" clay"> clay</a>, <a href="https://publications.waset.org/abstracts/search?q=nuclear%20waste%20disposal" title=" nuclear waste disposal"> nuclear waste disposal</a> </p> <a href="https://publications.waset.org/abstracts/43160/evaluation-on-mechanical-stabilities-of-clay-sand-mixtures-used-as-engineered-barrier-for-radioactive-waste-disposal" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/43160.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">385</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1694</span> Influence of Compactive Efforts on the Hydraulic Conductivity of Bagasse Ash Treated Black Cotton Soil</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=T.%20S.%20Ijimdiya">T. S. Ijimdiya</a>, <a href="https://publications.waset.org/abstracts/search?q=K.%20J.%20Osinubi"> K. J. Osinubi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This study examines the influence of compactive efforts on hydraulic conductivity behaviour of compacted black cotton soil treated with bagasse ash which is necessary in assessing the performance of the soil - bagasse ash mixture for use as a suitable barrier material in waste containment application. Black cotton soil treated with up to 12% bagasse ash (obtained from burning the fibrous residue from the extraction of sugar juice from sugarcane) by dry weight of soil for use in waste containment application. The natural soil classifies as A-7-6 or CH in accordance with the AASHTO and the Unified Soil Classification System, respectively. The treated soil samples were prepared at molding water contents of -2, 0, +2, and +4 % of optimum moisture contents and compacted using four compactive efforts of Reduced British Standard Light (RBSL), British Standard light (BSL), West African Standard (WAS) and British Standard Heavy (BSH). The results obtained show that hydraulic conductivity decreased with increase in bagasse ash content, moulding water content and compaction energy. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=bagasse%20ash%20treatment" title="bagasse ash treatment">bagasse ash treatment</a>, <a href="https://publications.waset.org/abstracts/search?q=black%20cotton%20soil" title=" black cotton soil"> black cotton soil</a>, <a href="https://publications.waset.org/abstracts/search?q=hydraulic%20conductivity" title=" hydraulic conductivity"> hydraulic conductivity</a>, <a href="https://publications.waset.org/abstracts/search?q=moulding%20water%20contents" title=" moulding water contents"> moulding water contents</a>, <a href="https://publications.waset.org/abstracts/search?q=compactive%20efforts" title=" compactive efforts"> compactive efforts</a> </p> <a href="https://publications.waset.org/abstracts/15288/influence-of-compactive-efforts-on-the-hydraulic-conductivity-of-bagasse-ash-treated-black-cotton-soil" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/15288.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">433</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1693</span> Modeling the Performance of Natural Sand-Bentonite Barriers after Infiltration with Polar and Non-Polar Hydrocarbon Leachates</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Altayeb%20Qasem">Altayeb Qasem</a>, <a href="https://publications.waset.org/abstracts/search?q=Mousa%20Bani%20Baker"> Mousa Bani Baker</a>, <a href="https://publications.waset.org/abstracts/search?q=Amani%20Nawafleh"> Amani Nawafleh</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The complexity of the sand-bentonite liner barrier system calls for an adequate model that reflects the conditions depending on the barrier materials and the characteristics of the permeates which lead to hydraulic conductivity changes when liners infiltrated with polar, no-polar, miscible and immiscible liquids. This paper is dedicated to developing a model for evaluating the hydraulic conductivity in the form of a simple indicator for the compatibility of the liner versus leachate. Based on two liner compositions (95% sand: 5% bentonite; and 90% sand: 10% bentonite), two pressures (40 kPa and 100 kPa), and three leachates: water, ethanol and biofuel. Two characteristics of the leacahtes were used: viscosity of permeate and its octanol-water partitioning coefficient (Kow). Three characteristics of the liners mixtures were evaluated which had impact on the hydraulic conductivity of the liner system: the initial content of bentonite (%), the free swelling index, and the shrinkage limit of the initial liner’s mixture. Engineers can use this modest tool to predict a potential liner failure in sand-bentonite barriers. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=liner%20performance" title="liner performance">liner performance</a>, <a href="https://publications.waset.org/abstracts/search?q=sand-bentonite%20barriers" title=" sand-bentonite barriers"> sand-bentonite barriers</a>, <a href="https://publications.waset.org/abstracts/search?q=viscosity" title=" viscosity"> viscosity</a>, <a href="https://publications.waset.org/abstracts/search?q=free%20swelling%20index" title=" free swelling index"> free swelling index</a>, <a href="https://publications.waset.org/abstracts/search?q=shrinkage%20limit" title=" shrinkage limit"> shrinkage limit</a>, <a href="https://publications.waset.org/abstracts/search?q=octanol-water%20partitioning%20coefficient" title=" octanol-water partitioning coefficient"> octanol-water partitioning coefficient</a>, <a href="https://publications.waset.org/abstracts/search?q=hydraulic%20conductivity" title=" hydraulic conductivity"> hydraulic conductivity</a>, <a href="https://publications.waset.org/abstracts/search?q=theoretical%20modeling" title=" theoretical modeling"> theoretical modeling</a> </p> <a href="https://publications.waset.org/abstracts/7476/modeling-the-performance-of-natural-sand-bentonite-barriers-after-infiltration-with-polar-and-non-polar-hydrocarbon-leachates" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/7476.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">414</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1692</span> Geo-Engineering Properties of Lime Stabilized Expansive Soil with Shredded Waste Tyre</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Upasana%20Pattnaik">Upasana Pattnaik</a>, <a href="https://publications.waset.org/abstracts/search?q=Akshaya%20Kumar%20Sabat"> Akshaya Kumar Sabat</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The compaction properties, unconfined compressive strength (UCS), soaked California bearing ratio (CBR), hydraulic conductivity, and swelling pressure of lime stabilized expansive soil-shredded waste tyre mixes have been discussed in this paper. Shredded waste tyres, passing 4.75 mm Indian Standard (IS) sieve and retained on 75µ IS sieve have been used in the experimental programme. First of all expansive soil-shredded waste tyre mixes were prepared by adding shredded waste tyre from 0 to 20% at an increment of 5%.Standard Proctor compaction, UCS and soaked CBR tests were conducted on these mixes. The optimum percentage of shredded waste tyre found out was 10%.In the second phase of the experiment, lime was added to sample having optimum percentage of expansive soil and shredded waste tyre from 2 to 6% at an increment of 1%.Compaction, UCS, soaked CBR, hydraulic conductivity, and swelling pressure tests were conducted on lime stabilized expansive soil-shredded waste tyre mixes. The optimum percentage of lime for stabilization was found out to be 5%.At the optimum percentage of lime the stabilized expansive soil-shredded waste tyre mix had increased strength, reduced hydraulic conductivity and swelling pressure. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=expansive%20soil" title="expansive soil">expansive soil</a>, <a href="https://publications.waset.org/abstracts/search?q=hydraulic%20conductivity" title=" hydraulic conductivity"> hydraulic conductivity</a>, <a href="https://publications.waset.org/abstracts/search?q=lime" title=" lime"> lime</a>, <a href="https://publications.waset.org/abstracts/search?q=shredded%20waste%20tyre" title=" shredded waste tyre"> shredded waste tyre</a>, <a href="https://publications.waset.org/abstracts/search?q=soaked%20california%20bearing%20ratio" title=" soaked california bearing ratio"> soaked california bearing ratio</a> </p> <a href="https://publications.waset.org/abstracts/87297/geo-engineering-properties-of-lime-stabilized-expansive-soil-with-shredded-waste-tyre" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/87297.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">269</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1691</span> Hydraulic Characteristics of Mine Tailings by Metaheuristics Approach</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Akhila%20Vasudev">Akhila Vasudev</a>, <a href="https://publications.waset.org/abstracts/search?q=Himanshu%20Kaushik"> Himanshu Kaushik</a>, <a href="https://publications.waset.org/abstracts/search?q=Tadikonda%20Venkata%20Bharat"> Tadikonda Venkata Bharat</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A large number of mine tailings are produced every year as part of the extraction process of phosphates, gold, copper, and other materials. Mine tailings are high in water content and have very slow dewatering behavior. The efficient design of tailings dam and economical disposal of these slurries requires the knowledge of tailings consolidation behavior. The large-strain consolidation theory closely predicts the self-weight consolidation of these slurries as the theory considers the conservation of mass and momentum conservation and considers the hydraulic conductivity as a function of void ratio. Classical laboratory techniques, such as settling column test, seepage consolidation test, etc., are expensive and time-consuming for the estimation of hydraulic conductivity variation with void ratio. Inverse estimation of the constitutive relationships from the measured settlement versus time curves is explored. In this work, inverse analysis based on metaheuristics techniques will be explored for predicting the hydraulic conductivity parameters for mine tailings from the base excess pore water pressure dissipation curve and the initial conditions of the mine tailings. The proposed inverse model uses particle swarm optimization (PSO) algorithm, which is based on the social behavior of animals searching for food sources. The finite-difference numerical solution of the forward analytical model is integrated with the PSO algorithm to solve the inverse problem. The method is tested on synthetic data of base excess pore pressure dissipation curves generated using the finite difference method. The effectiveness of the method is verified using base excess pore pressure dissipation curve obtained from a settling column experiment and further ensured through comparison with available predicted hydraulic conductivity parameters. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=base%20excess%20pore%20pressure" title="base excess pore pressure">base excess pore pressure</a>, <a href="https://publications.waset.org/abstracts/search?q=hydraulic%20conductivity" title=" hydraulic conductivity"> hydraulic conductivity</a>, <a href="https://publications.waset.org/abstracts/search?q=large%20strain%20consolidation" title=" large strain consolidation"> large strain consolidation</a>, <a href="https://publications.waset.org/abstracts/search?q=mine%20tailings" title=" mine tailings"> mine tailings</a> </p> <a href="https://publications.waset.org/abstracts/133056/hydraulic-characteristics-of-mine-tailings-by-metaheuristics-approach" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/133056.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">136</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1690</span> Prediction of Saturated Hydraulic Conductivity Dynamics in an Iowan Agriculture Watershed</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Elhakeem">Mohamed Elhakeem</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20N.%20Thanos%20Papanicolaou"> A. N. Thanos Papanicolaou</a>, <a href="https://publications.waset.org/abstracts/search?q=Christopher%20Wilson"> Christopher Wilson</a>, <a href="https://publications.waset.org/abstracts/search?q=Yi-Jia%20Chang"> Yi-Jia Chang</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this study, a physically-based, modelling framework was developed to predict saturated hydraulic conductivity (KSAT) dynamics in the Clear Creek Watershed (CCW), Iowa. The modelling framework integrated selected pedotransfer functions and watershed models with geospatial tools. A number of pedotransfer functions and agricultural watershed models were examined to select the appropriate models that represent the study site conditions. Models selection was based on statistical measures of the models’ errors compared to the KSAT field measurements conducted in the CCW under different soil, climate and land use conditions. The study has shown that the predictions of the combined pedotransfer function of Rosetta and the Water Erosion Prediction Project (WEPP) provided the best agreement to the measured KSAT values in the CCW compared to the other tested models. Therefore, Rosetta and WEPP were integrated with the Geographic Information System (GIS) tools for visualization of the data in forms of geospatial maps and prediction of KSAT variability in CCW due to the seasonal changes in climate and land use activities. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=saturated%20hydraulic%20conductivity" title="saturated hydraulic conductivity">saturated hydraulic conductivity</a>, <a href="https://publications.waset.org/abstracts/search?q=pedotransfer%20functions" title=" pedotransfer functions"> pedotransfer functions</a>, <a href="https://publications.waset.org/abstracts/search?q=watershed%20models" title=" watershed models"> watershed models</a>, <a href="https://publications.waset.org/abstracts/search?q=geospatial%20tools" title=" geospatial tools"> geospatial tools</a> </p> <a href="https://publications.waset.org/abstracts/5877/prediction-of-saturated-hydraulic-conductivity-dynamics-in-an-iowan-agriculture-watershed" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/5877.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">260</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1689</span> Characterization of Aquifer Systems and Identification of Potential Groundwater Recharge Zones Using Geospatial Data and Arc GIS in Kagandi Water Supply System Well Field</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Aijuka%20Nicholas">Aijuka Nicholas</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A research study was undertaken to characterize the aquifers and identify the potential groundwater recharge zones in the Kagandi district. Quantitative characterization of hydraulic conductivities of aquifers is of fundamental importance to the study of groundwater flow and contaminant transport in aquifers. A conditional approach is used to represent the spatial variability of hydraulic conductivity. Briefly, it involves using qualitative and quantitative geologic borehole-log data to generate a three-dimensional (3D) hydraulic conductivity distribution, which is then adjusted through calibration of a 3D groundwater flow model using pumping-test data and historic hydraulic data. The approach consists of several steps. The study area was divided into five sub-watersheds on the basis of artificial drainage divides. A digital terrain model (DTM) was developed using Arc GIS to determine the general drainage pattern of Kagandi watershed. Hydrologic characterization involved the determination of the various hydraulic properties of the aquifers. Potential groundwater recharge zones were identified by integrating various thematic maps pertaining to the digital elevation model, land use, and drainage pattern in Arc GIS and Sufer golden software. The study demonstrates the potential of GIS in delineating groundwater recharge zones and that the developed methodology will be applicable to other watersheds in Uganda. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=aquifers" title="aquifers">aquifers</a>, <a href="https://publications.waset.org/abstracts/search?q=Arc%20GIS" title=" Arc GIS"> Arc GIS</a>, <a href="https://publications.waset.org/abstracts/search?q=groundwater%20recharge" title=" groundwater recharge"> groundwater recharge</a>, <a href="https://publications.waset.org/abstracts/search?q=recharge%20zones" title=" recharge zones"> recharge zones</a> </p> <a href="https://publications.waset.org/abstracts/118338/characterization-of-aquifer-systems-and-identification-of-potential-groundwater-recharge-zones-using-geospatial-data-and-arc-gis-in-kagandi-water-supply-system-well-field" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/118338.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">147</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1688</span> The Thermal Simulation of Hydraulic Cable Drum Trailers 15-Ton</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ahmad%20Abdul-Razzak%20Aboudi%20Al-Issa">Ahmad Abdul-Razzak Aboudi Al-Issa</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Thermal is the main important aspect in any hydraulic system since it is affected on the hydraulic system performance. Therefore must be simulated the hydraulic system -that was designed- in this aspect before constructing it. In this study, an existed expert system was using to simulate the thermal aspect of a designed hydraulic system that will be used in an industrial field. The expert system which is used in this study is (Hydraulic System Calculations), and its symbol (HSC). HSC had been designed and coded in an interactive program userfriendly named (Microsoft Visual Basic 2010). <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=fluid%20power" title="fluid power">fluid power</a>, <a href="https://publications.waset.org/abstracts/search?q=hydraulic%20system" title=" hydraulic system"> hydraulic system</a>, <a href="https://publications.waset.org/abstracts/search?q=thermal%20and%20hydrodynamic" title=" thermal and hydrodynamic"> thermal and hydrodynamic</a>, <a href="https://publications.waset.org/abstracts/search?q=expert%20system" title=" expert system"> expert system</a> </p> <a href="https://publications.waset.org/abstracts/17006/the-thermal-simulation-of-hydraulic-cable-drum-trailers-15-ton" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/17006.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">500</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1687</span> The Effect of Nanoclay on the Hydraulic Conductivity of Clayey Sand Soils </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Javad%20Saeidaskari">Javad Saeidaskari</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohammad%20Hassan%20Baziar"> Mohammad Hassan Baziar</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Soil structures have been frequently damaged during piping, earthquake and other types of failures. As far as adverse circumstances were developed subsequent to piping or other similar failure types, hydraulic parameters of soil such as hydraulic conductivity should be considered. As a result, acquiring an approach to diminish soil permeability is inevitable. There are many ground improvement methods to reduce seepage, which are classified under soil treatment and stabilization methods. Recently, one of the soil improvement methods is known as nanogeotechnology. This study aims to investigate the influence of Cloisite 30B nanoclay on permeability of compacted clayey sand soils. The samples are prepared by mixing two soil types, including Kaolin clay and Firouzkooh sand, in 1:9 and 1:5 clay:sand (by mass) proportions. In experimental procedure, initially, the optimum water content and maximum dry unit weight of each samples were obtained for compaction. Then, series of permeability tests were conducted by triaxial apparatus on prepared specimens with identical relative density of 95% of maximum dry density and water content of 1% wet of optimum for different weight percentages of nanoclay (1% to 4%). Therefore, in this paper, the effect of time on treated specimen was appraised, as well as two approaches of manual mixing and ball milling were compared to reveal the importance of dispersion issue. The results show that adding nanoclay up to 3%, as its optimum content, causes notable reduction in permeability (1.60e-03 to 5.51e-05 cm/s and 3.32e-04 to 8.44e-07 cm/s in samples with 1:9 and 1:5 mixture proportions, respectively). The hydraulic conductivity of treated clayey sand (1:5 mixture proportion with 3% nanoclay) decreases gradually from 8.44e-07 to 3.00e-07 cm/s within 90 days and then tends to be consistent. The influence of mixing method on permeability results shows that the utilization of ball mill mixing effectively leads to lower values than those of manual mixing, in other words, by adding 3% nanoclay, hydraulic conductivity of specimen declines from 8.44e-07 to 2.00e-07 cm/s. In order to evaluate the interaction between soil particles and, to ensure proper dispersion of nanoparticles through clayey sand mixture, they were magnified by means of scanning electron microscope (SEM). In conclusion, the nanoclay particles in vicinity of moisture can cause soil stabilization to prevent water penetration, which eventually result in lower usage of clay and operation costs. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=nanoclay" title="nanoclay">nanoclay</a>, <a href="https://publications.waset.org/abstracts/search?q=cloisite%2030b" title=" cloisite 30b"> cloisite 30b</a>, <a href="https://publications.waset.org/abstracts/search?q=clayey%20sand" title=" clayey sand"> clayey sand</a>, <a href="https://publications.waset.org/abstracts/search?q=hydraulic%20conductivity" title=" hydraulic conductivity"> hydraulic conductivity</a> </p> <a href="https://publications.waset.org/abstracts/37171/the-effect-of-nanoclay-on-the-hydraulic-conductivity-of-clayey-sand-soils" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/37171.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">349</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1686</span> Design an Expert System to Assess the Hydraulic System in Thermal and Hydrodynamic Aspect</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ahmad%20Abdul-Razzak%20Aboudi%20Al-Issa">Ahmad Abdul-Razzak Aboudi Al-Issa</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Thermal and Hydrodynamic are basic aspects in any hydraulic system and therefore, they must be assessed with regard to this aspect before constructing the system. This assessment needs a good expertise in this aspect to obtain an efficient hydraulic system. Therefore, this study aims to build an expert system called Hydraulic System Calculations (HSC) to ensure a smooth operation for the hydraulic system. The expert system (HSC) had been designed and coded in an user-friendly interactive program called Microsoft Visual Basic 2010. The suggested code provides the designer with a number of choices to resolve the problem of hydraulic oil overheating which may arise during the continuous operation of the hydraulic unit. As a result, the HSC can minimize the human errors, effort, time and cost of hydraulic machine design. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=fluid%20power" title="fluid power">fluid power</a>, <a href="https://publications.waset.org/abstracts/search?q=hydraulic%20system" title=" hydraulic system"> hydraulic system</a>, <a href="https://publications.waset.org/abstracts/search?q=thermal%20and%20hydrodynamic" title=" thermal and hydrodynamic"> thermal and hydrodynamic</a>, <a href="https://publications.waset.org/abstracts/search?q=expert%20system" title=" expert system"> expert system</a> </p> <a href="https://publications.waset.org/abstracts/4076/design-an-expert-system-to-assess-the-hydraulic-system-in-thermal-and-hydrodynamic-aspect" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/4076.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">446</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1685</span> Biochar - A Multi-Beneficial and Cost-Effective Amendment to Clay Soil for Stormwater Runoff Treatment</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mohammad%20Khalid">Mohammad Khalid</a>, <a href="https://publications.waset.org/abstracts/search?q=Mariya%20Munir"> Mariya Munir</a>, <a href="https://publications.waset.org/abstracts/search?q=Jacelyn%20Rice%20Boyaue"> Jacelyn Rice Boyaue</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Highways are considered a major source of pollution to storm-water, and its runoff can introduce various contaminants, including nutrients, Indicator bacteria, heavy metals, chloride, and phosphorus compounds, which can have negative impacts on receiving waters. This study assessed the ability of biochar for contaminants removal and to improve the water holding capacity of soil biochar mixture. For this, ten commercially available biochar has been strategically selected. Lab scale batch testing was done at 3% and 6% by the weight of the soil to find the preliminary estimate of contaminants removal along with hydraulic conductivity and water retention capacity. Furthermore, from the above-conducted studies, six best performing candidate and an application rate of 6% has been selected for the column studies. Soil biochar mixture was filled in 7.62 cm assembled columns up to a fixed height of 76.2 cm based on hydraulic conductivity. A total of eight column experiments have been conducted for nutrient, heavy metal, and indicator bacteria analysis over a period of one year, which includes a drying as well as a deicing period. The saturated hydraulic conductivity was greatly improved, which is attributed to the high porosity of the biochar soil mixture. Initial data from the column testing shows that biochar may have the ability to significantly remove nutrients, indicator bacteria, and heavy metals. The overall study demonstrates that biochar could be efficiently applied with clay soil to improve the soil's hydraulic characteristics as well as remove the pollutants from the stormwater runoff. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=biochar" title="biochar">biochar</a>, <a href="https://publications.waset.org/abstracts/search?q=nutrients" title=" nutrients"> nutrients</a>, <a href="https://publications.waset.org/abstracts/search?q=indicator%20bacteria" title=" indicator bacteria"> indicator bacteria</a>, <a href="https://publications.waset.org/abstracts/search?q=storm-water%20treatment" title=" storm-water treatment"> storm-water treatment</a>, <a href="https://publications.waset.org/abstracts/search?q=sustainability" title=" sustainability"> sustainability</a> </p> <a href="https://publications.waset.org/abstracts/157625/biochar-a-multi-beneficial-and-cost-effective-amendment-to-clay-soil-for-stormwater-runoff-treatment" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/157625.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">121</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1684</span> Estimation of Aquifer Properties Using Pumping Tests: Case Study of Pydibhimavaram Industrial Area, Srikakulam, India</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=G.%20Venkata%20Rao">G. Venkata Rao</a>, <a href="https://publications.waset.org/abstracts/search?q=P.%20Kalpana"> P. Kalpana</a>, <a href="https://publications.waset.org/abstracts/search?q=R.%20Srinivasa%20Rao"> R. Srinivasa Rao</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Adequate and reliable estimates of aquifer parameters are of utmost importance for proper management of vital groundwater resources. At present scenario the ground water is polluted because of industrial waste disposed over the land and the contaminants are transported in the aquifer from one area to another area which is depending on the characteristics of the aquifer and contaminants. To know the contaminant transport, the accurate estimation of aquifer properties is highly needed. Conventionally, these properties are estimated through pumping tests carried out on water wells. The occurrence and movement of ground water in the aquifer are characteristically defined by the aquifer parameters. The pumping (aquifer) test is the standard technique for estimating various hydraulic properties of aquifer systems, viz, transmissivity (T), hydraulic conductivity (K), storage coefficient (S) etc., for which the graphical method is widely used. The study area for conducting pumping test is Pydibheemavaram Industrial area near the coastal belt of Srikulam, AP, India. The main objective of the present work is to estimate the aquifer properties for developing contaminant transport model for the study area. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=aquifer" title="aquifer">aquifer</a>, <a href="https://publications.waset.org/abstracts/search?q=contaminant%20transport" title=" contaminant transport"> contaminant transport</a>, <a href="https://publications.waset.org/abstracts/search?q=hydraulic%20conductivity" title=" hydraulic conductivity"> hydraulic conductivity</a>, <a href="https://publications.waset.org/abstracts/search?q=industrial%20waste" title=" industrial waste"> industrial waste</a>, <a href="https://publications.waset.org/abstracts/search?q=pumping%20test" title=" pumping test"> pumping test</a> </p> <a href="https://publications.waset.org/abstracts/31498/estimation-of-aquifer-properties-using-pumping-tests-case-study-of-pydibhimavaram-industrial-area-srikakulam-india" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/31498.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">446</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1683</span> Valorization of Local Materials in the Waterproofing Technique of Landfills Site "TLS"</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=M.%20Debieche">M. Debieche</a>, <a href="https://publications.waset.org/abstracts/search?q=F.%20Kaoua"> F. Kaoua</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper deals with the use two locals materials abundant in our country, with the view to use a mixture in the waterproofing the landfills. Our interest comes from the necessity to the environment protection, which has recently considerably grown. The site's waterproofing technique, in the landfills sites, is nowadays a very necessary condition to protect the environment, which requires the use of appropriate materials. To this end, an optimal mixture ensuring good performance in terms of hydraulic conductivity, durability and shear strength, mixtures based of sand at different concentrations of sodium bentonite, at compact state are prepared and studied. This study showed that a low permeability of mixture (sand / bentonite) can be achieved 6% of sodium bentonite. This mixture confers also good mechanical behavior, expressed by the recorded, reduction of friction (φ) and the increase of the cohesion (C). Thus, the selected formulation represents an optimal mixture for waterproofing systems. It guarantees an economical and ecological advantages. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=hydraulic%20conductivity" title="hydraulic conductivity">hydraulic conductivity</a>, <a href="https://publications.waset.org/abstracts/search?q=sand" title=" sand"> sand</a>, <a href="https://publications.waset.org/abstracts/search?q=sodium%20bentonite" title=" sodium bentonite"> sodium bentonite</a>, <a href="https://publications.waset.org/abstracts/search?q=sustainability" title=" sustainability"> sustainability</a> </p> <a href="https://publications.waset.org/abstracts/32105/valorization-of-local-materials-in-the-waterproofing-technique-of-landfills-site-tls" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/32105.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">275</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1682</span> A Study on the Life Prediction Performance Degradation Analysis of the Hydraulic Breaker</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jong%20Won">Jong Won</a>, <a href="https://publications.waset.org/abstracts/search?q=Park"> Park</a>, <a href="https://publications.waset.org/abstracts/search?q=Sung%20Hyun"> Sung Hyun</a>, <a href="https://publications.waset.org/abstracts/search?q=Kim"> Kim </a> </p> <p class="card-text"><strong>Abstract:</strong></p> The kinetic energy to pass subjected to shock and chisel reciprocating piston hydraulic power supplied by the excavator using for the purpose of crushing the rock, and roads, buildings, etc., hydraulic breakers blow. Impact frequency, efficiency measurement of the impact energy, hydraulic breakers, to demonstrate the ability of hydraulic breaker manufacturers and users to a very important item. And difficult in order to confirm the initial performance degradation in the life of the hydraulic breaker has been thought to be a problem.In this study, we measure the efficiency of hydraulic breaker, Impact energy and Impact frequency, the degradation analysis of research to predict the life. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=impact%20energy" title="impact energy">impact energy</a>, <a href="https://publications.waset.org/abstracts/search?q=impact%20%20frequency" title=" impact frequency"> impact frequency</a>, <a href="https://publications.waset.org/abstracts/search?q=hydraulic%20breaker" title=" hydraulic breaker"> hydraulic breaker</a>, <a href="https://publications.waset.org/abstracts/search?q=life%20prediction" title=" life prediction"> life prediction</a> </p> <a href="https://publications.waset.org/abstracts/14055/a-study-on-the-life-prediction-performance-degradation-analysis-of-the-hydraulic-breaker" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/14055.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">441</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1681</span> Using Complete Soil Particle Size Distributions for More Precise Predictions of Soil Physical and Hydraulic Properties</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Habib%20Khodaverdiloo">Habib Khodaverdiloo</a>, <a href="https://publications.waset.org/abstracts/search?q=Fatemeh%20%20Afrasiabi"> Fatemeh Afrasiabi</a>, <a href="https://publications.waset.org/abstracts/search?q=Farrokh%20%20Asadzadeh"> Farrokh Asadzadeh</a>, <a href="https://publications.waset.org/abstracts/search?q=Martinus%20Th.%20Van%20Genuchten"> Martinus Th. Van Genuchten</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The soil particle-size distribution (PSD) is known to affect a broad range of soil physical, mechanical and hydraulic properties. Complete descriptions of a PSD curve should provide more information about these properties as opposed to having only information about soil textural class or the soil sand, silt and clay (SSC) fractions. We compared the accuracy of 19 different models of the cumulative PSD in terms of fitting observed data from a large number of Iranian soils. Parameters of the six most promising models were correlated with measured values of the field saturated hydraulic conductivity (Kfs), the mean weight diameter of soil aggregates (MWD), bulk density (ρb), and porosity (∅). These same soil properties were correlated also with conventional PSD parameters (SSC fractions), selected geometric PSD parameters (notably the mean diameter dg and its standard deviation σg), and several other PSD parameters (D50 and D60). The objective was to find the best predictions of several soil physical quality indices and the soil hydraulic properties. Neither SSC nor dg, σg, D50 and D60 were found to have a significant correlation with both Kfs or logKfs, However, the parameters of several cumulative PSD models showed statistically significant correlation with Kfs and/or logKfs (|r| = 0.42 to 0.65; p ≤ 0.05). The correlation between MWD and the model parameters was generally also higher than either with SSC fraction and dg, or with D50 and D60. Porosity (∅) and the bulk density (ρb) also showed significant correlation with several PSD model parameters, with ρb additionally correlating significantly with various geometric (dg), mechanical (D50 and D60), and agronomic (clay and sand) representations of the PSD. The fitted parameters of selected PSD models furthermore showed statistically significant correlations with Kfs,, MWD and soil porosity, which may be viewed as soil quality indices. Results of this study are promising for developing more accurate pedotransfer functions. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=particle%20size%20distribution" title="particle size distribution">particle size distribution</a>, <a href="https://publications.waset.org/abstracts/search?q=soil%20texture" title=" soil texture"> soil texture</a>, <a href="https://publications.waset.org/abstracts/search?q=hydraulic%20conductivity" title=" hydraulic conductivity"> hydraulic conductivity</a>, <a href="https://publications.waset.org/abstracts/search?q=pedotransfer%20functions" title=" pedotransfer functions"> pedotransfer functions</a> </p> <a href="https://publications.waset.org/abstracts/56687/using-complete-soil-particle-size-distributions-for-more-precise-predictions-of-soil-physical-and-hydraulic-properties" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/56687.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">279</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1680</span> Exploring the Impact of Tillage and Manure on Soil Water Retention and Van Genuchten</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Azadeh%20Safadoust">Azadeh Safadoust</a>, <a href="https://publications.waset.org/abstracts/search?q=Ali%20Akbar%20Mahboubi"> Ali Akbar Mahboubi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A study was conducted to evaluate hydraulic properties of a sandy loam soil and corn (Zea mays L.) crop production under a short-term tillage and manure combinations field experiment carried out in west of Iran. Treatments included composted cattle manure application rates [0, 30, and 60 Mg (dry weight) ha-1] and tillage systems [no-tillage (NT), chisel plowing (CP), and moldboard plowing (MP)] arranged in a split-plot design. Soil water characteristic curve (SWCC) and saturated hydraulic conductivity (Ks) were significantly affected by manure and tillage treatments. At any matric suction, the soil water content was in the order of MP>CP>NT. At all matric suctions, the amount of water retained by the soil increased as manure application rate increased (i.e. 60>30>0 Mg ha-1). Similar to the tillage effects, at high suctions the differences of water retained due to manure addition were less than that at low suctions. The change of SWCC from tillage methods and manure applications may attribute to the change of pore size and aggregate size distributions. Soil Ks was in the order of CP>MP>NT for the first two layers and in the order of MP>CP and NT for the deeper soil layer. The Ks also increased with increasing rates of manure application (i.e. 60>30>0 Mg ha-1). This was due to the increase in the total pore size and continuity. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=corn" title="corn">corn</a>, <a href="https://publications.waset.org/abstracts/search?q=manure" title=" manure"> manure</a>, <a href="https://publications.waset.org/abstracts/search?q=saturated%20hydraulic%20conductivity" title=" saturated hydraulic conductivity"> saturated hydraulic conductivity</a>, <a href="https://publications.waset.org/abstracts/search?q=soil%20water%20characteristic%20curve" title=" soil water characteristic curve"> soil water characteristic curve</a>, <a href="https://publications.waset.org/abstracts/search?q=tillage" title=" tillage"> tillage</a> </p> <a href="https://publications.waset.org/abstracts/179918/exploring-the-impact-of-tillage-and-manure-on-soil-water-retention-and-van-genuchten" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/179918.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">75</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1679</span> Hygrothermal Properties of Raw Earth Material</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ichrak%20Hamrouni">Ichrak Hamrouni</a>, <a href="https://publications.waset.org/abstracts/search?q=Tariq%20Ouahbi"> Tariq Ouahbi</a>, <a href="https://publications.waset.org/abstracts/search?q=Natalija%20Lhuissier"> Natalija Lhuissier</a>, <a href="https://publications.waset.org/abstracts/search?q=Sa%C3%AFd%20Taibi"> Saïd Taibi</a>, <a href="https://publications.waset.org/abstracts/search?q=Mehrez%20Jemai"> Mehrez Jemai</a>, <a href="https://publications.waset.org/abstracts/search?q=Olivier%20Crumeyrolle"> Olivier Crumeyrolle</a>, <a href="https://publications.waset.org/abstracts/search?q=Hatem%20Zenzri"> Hatem Zenzri</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Raw earth is the oldest building technique used for over 11 centuries, thanks to its various benefits. The most known raw earth construction technics are compressed earth blocks, rammed earth, raw earth concrete, and daub. The raw earth can be stabilized with hydraulic binders, mixed by fibers, or hyper-compacted in order to improve its mechanical behaviour. Moreover, raw earth is characterized by a low thermal conductivity what make it a good thermal insulator, and it has a very important capacity to condense and evaporate relative humidity. In this context, many researches have been developed. They have shown that the mechanical characteristics of earth materials increase with the hyper-compaction and adding fibers or hydraulic binders. Besides, other researches have been determined the thermal and hygroscopic properties of raw earth. They have shown that this material able to contribute to moisture and heat control in constructions. Its hygrothermal properties are better than fired earth bricks and concrete. The aim of this study is to evaluate the thermal and hygrometric behavior of raw earth material using experimental tests allows to determine the main Hygrothermal properties such as the water Vapour permeability and thermal conductivity and compare the results with those of other building materials such as fired clay bricks and cement concrete is presented. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=raw%20earth%20material" title="raw earth material">raw earth material</a>, <a href="https://publications.waset.org/abstracts/search?q=hygro-thermal" title=" hygro-thermal"> hygro-thermal</a>, <a href="https://publications.waset.org/abstracts/search?q=thermal%20conductivity" title=" thermal conductivity"> thermal conductivity</a>, <a href="https://publications.waset.org/abstracts/search?q=water%20vapour%20permeability" title=" water vapour permeability"> water vapour permeability</a>, <a href="https://publications.waset.org/abstracts/search?q=building%20materials" title=" building materials"> building materials</a>, <a href="https://publications.waset.org/abstracts/search?q=building%20materials" title=" building materials"> building materials</a> </p> <a href="https://publications.waset.org/abstracts/143371/hygrothermal-properties-of-raw-earth-material" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/143371.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">175</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1678</span> Soil Water Retention and Van Genuchten Parameters following Tillage and Manure Effects</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Shahin%20Farajifar">Shahin Farajifar</a>, <a href="https://publications.waset.org/abstracts/search?q=Azadeh%20Safadoust"> Azadeh Safadoust</a>, <a href="https://publications.waset.org/abstracts/search?q=Ali%20Akbar%20Mahboubi"> Ali Akbar Mahboubi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A study was conducted to evaluate hydraulic properties of a sandy loam soil and corn (Zea mays L.) crop production under a short-term tillage and manure combinations field experiment carried out in west of Iran. Treatments included composted cattle manure application rates [0, 30, and 60 Mg (dry weight) ha-1] and tillage systems [no-tillage (NT), chisel plowing (CP), and moldboard plowing (MP)] arranged in a split-plot design. Soil water characteristic curve (SWCC) and saturated hydraulic conductivity (Ks) were significantly affected by manure and tillage treatments. At any matric suction, the soil water content was in the order of MP>CP>NT. At all matric suctions, the amount of water retained by the soil increased as manure application rate increased (i.e. 60>30>0 Mg ha-1). Similar to the tillage effects, at high suctions the differences of water retained due to manure addition were less than that at low suctions. The change of SWCC from tillage methods and manure applications may attribute to the change of pore size and aggregate size distributions. Soil Ks was in the order of CP>MP>NT for the first two layers and in the order of MP>CP and NT for the deeper soil layer. The Ks also increased with increasing rates of manure application (i.e. 60>30>0 Mg ha-1). This was due to the increase in the total pore size and continuity. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=corn" title="corn">corn</a>, <a href="https://publications.waset.org/abstracts/search?q=manuure" title=" manuure"> manuure</a>, <a href="https://publications.waset.org/abstracts/search?q=saturated%20hydraulic%20conductivity" title=" saturated hydraulic conductivity"> saturated hydraulic conductivity</a>, <a href="https://publications.waset.org/abstracts/search?q=soil%20water%20characteristic%20curve" title=" soil water characteristic curve"> soil water characteristic curve</a>, <a href="https://publications.waset.org/abstracts/search?q=tillage" title=" tillage"> tillage</a> </p> <a href="https://publications.waset.org/abstracts/169776/soil-water-retention-and-van-genuchten-parameters-following-tillage-and-manure-effects" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/169776.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">74</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1677</span> Effect of Temperature on the Permeability and Time-Dependent Change in Thermal Volume of Bentonite Clay During the Heating-Cooling Cycle</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Nilufar%20Chowdhury">Nilufar Chowdhury</a>, <a href="https://publications.waset.org/abstracts/search?q=Fereydoun%20Najafian%20Jazi"> Fereydoun Najafian Jazi</a>, <a href="https://publications.waset.org/abstracts/search?q=Omid%20Ghasemi-Fare"> Omid Ghasemi-Fare</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The thermal effect on soil properties induces significant variations in hydraulic conductivity, which is attributable to temperature-dependent transitions in soil properties. With the elevation of temperature, there can be a notable increase in intrinsic permeability due to the degeneration of bound water molecules into a free state facilitated by thermal energy input. Conversely, thermal consolidation may cause a reduction in intrinsic permeability as soil particles undergo densification. This thermal response of soil permeability exhibits pronounced heterogeneity across different soil types. Furthermore, this temperature-induced disruption of the bound water within clay matrices can enhance the mineral-to-mineral contact, initiating irreversible deformation within the clay structure. This indicates that when soil undergoes heating-cooling cycles, plastic strain can develop, which needs to be investigated for every soil type to understand the thermo-hydro mechanical behavior of clay properly. This research aims to study the effect of the heating-cooling cycle on the intrinsic permeability and time-dependent evaluation of thermal volume change of sodium Bentonite clay. A temperature-controlled triaxial permeameter cell is used in this study. The selected temperature is 20° C, 40° C, 40° C and 80° C. The hydraulic conductivity of Bentonite clay under 100 kPa confining stresses was measured. Hydraulic conductivity analysis was performed on a saturated sample for a void ratio e = 0.9, corresponding to a dry density of 1.2 Mg/m3. Different hydraulic gradients were applied between the top and bottom of the sample to obtain a measurable flow through the sample. The hydraulic gradient used for the experiment was 4000. The diameter and thickness of the sample are 101. 6 mm, and 25.4 mm, respectively. Both for heating and cooling, the hydraulic conductivity at each temperature is measured after the flow reaches the steady state condition to make sure the volume change due to thermal loading is stabilized. Thus, soil specimens were kept at a constant temperature during both the heating and cooling phases for at least 10-18 days to facilitate the equilibration of hydraulic transients. To assess the influence of temperature-induced volume changes of Bentonite clay, the evaluation of void ratio change during this time period has been monitored. It is observed that the intrinsic permeability increases by 30-40% during the heating cycle. The permeability during the cooling cycle is 10-12% lower compared to the permeability observed during the heating cycle at a particular temperature. This reduction in permeability implies a change in soil fabric due to the thermal effect. An initial increase followed by a rapid decrease in void ratio was observed, representing the occurrence of possible osmotic swelling phenomena followed by thermal consolidation. It has been observed that after a complete heating-cooling cycle, there is a significant change in the void ratio compared to the initial void ratio of the sample. The results obtained suggest that Bentonite clay’s microstructure can change subject to a complete heating-cooling process, which regulates macro behavior such as the permeability of Bentonite clay. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=bentonite" title="bentonite">bentonite</a>, <a href="https://publications.waset.org/abstracts/search?q=permeability" title=" permeability"> permeability</a>, <a href="https://publications.waset.org/abstracts/search?q=temperature" title=" temperature"> temperature</a>, <a href="https://publications.waset.org/abstracts/search?q=thermal%20volume%20change" title=" thermal volume change"> thermal volume change</a> </p> <a href="https://publications.waset.org/abstracts/186783/effect-of-temperature-on-the-permeability-and-time-dependent-change-in-thermal-volume-of-bentonite-clay-during-the-heating-cooling-cycle" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/186783.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">49</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1676</span> Tillage and Manure Effects on Water Retention and Van Genuchten Parameters in Western Iran</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Azadeh%20Safadoust">Azadeh Safadoust</a>, <a href="https://publications.waset.org/abstracts/search?q=Ali%20Akbar%20Mahboubi"> Ali Akbar Mahboubi</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohammad%20Reza%20Mosaddeghi"> Mohammad Reza Mosaddeghi</a>, <a href="https://publications.waset.org/abstracts/search?q=Bahram%20Gharabaghi"> Bahram Gharabaghi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A study was conducted to evaluate hydraulic properties of a sandy loam soil and corn (Zea mays L.) crop production under a short-term tillage and manure combinations field experiment carried out in west of Iran. Treatments included composted cattle manure application rates [0, 30, and 60 Mg (dry weight) ha⁻¹] and tillage systems [no-tillage (NT), chisel plowing (CP), and moldboard plowing (MP)] arranged in a split-plot design. Soil water characteristic curve (SWCC) and saturated hydraulic conductivity (Ks) were significantly affected by manure and tillage treatments. At any matric suction, the soil water content was in the order of MP>CP>NT. At all matric suctions, the amount of water retained by the soil increased as manure application rate increased (i.e. 60>30>0 Mg ha⁻¹). Similar to the tillage effects, at high suctions the differences of water retained due to manure addition were less than that at low suctions. The change of SWCC from tillage methods and manure applications may attribute to the change of pore size and aggregate size distributions. Soil Ks was in the order of CP>MP>NT for the first two layers and in the order of MP>CP and NT for the deeper soil layer. The Ks also increased with increasing rates of manure application (i.e. 60>30>0 Mg ha⁻¹). This was due to the increase in the total pore size and continuity. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=corn" title="corn">corn</a>, <a href="https://publications.waset.org/abstracts/search?q=manure" title=" manure"> manure</a>, <a href="https://publications.waset.org/abstracts/search?q=saturated%20hydraulic%20conductivity" title=" saturated hydraulic conductivity"> saturated hydraulic conductivity</a>, <a href="https://publications.waset.org/abstracts/search?q=soil%20water%20characteristic%20curve" title=" soil water characteristic curve"> soil water characteristic curve</a>, <a href="https://publications.waset.org/abstracts/search?q=tillage" title=" tillage"> tillage</a> </p> <a href="https://publications.waset.org/abstracts/160768/tillage-and-manure-effects-on-water-retention-and-van-genuchten-parameters-in-western-iran" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/160768.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">78</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1675</span> The Influence of Different Technologies on the Infiltration Properties and Soil Surface Crusting Processing in the North Bohemia Region</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Miroslav%20Dumbrovsky">Miroslav Dumbrovsky</a>, <a href="https://publications.waset.org/abstracts/search?q=Lucie%20Larisova"> Lucie Larisova</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The infiltration characteristic of the soil surface is one of the major factors that determines the potential soil degradation risk. The physical, chemical and biological characteristic of soil is changed by the processing of soil. The infiltration soil ability has an important role in soil and water conservation. The subject of the contribution is the evaluation of the influence of the conventional tillage and reduced tillage technology on soil surface crusting processing and infiltration properties of the soil in the North Bohemia region. Field experimental work at the area was carried out in the years 2013-2016 on Cambisol district medium-heavy clayey soil. The research was conducted on sloping erosion-endangered blocks of compacted arable land. The areas were chosen each year in the way that one of the experimental areas was handled by conventional tillage technologies and the other by reduced tillage technologies. Intact soil samples were taken into Kopecký´s cylinders in the three landscape positions, at a depth of 10 cm (representing topsoil) and 30 cm (representing subsoil). The cumulative infiltration was measured using a mini-disc infiltrometer near the consumption points. The Zhang method (1997), which provides an estimate of the unsaturated hydraulic conductivity K(h), was used for the evaluation of the infiltration tests of the mini-disc infiltrometer. The soil profile processed by conventional tillage showed a higher degree of compaction and soil crusting processing. The bulk density was between 1.10–1.67 g.cm⁻³, compared to the land processed by the reduced tillage technology, where the values were between 0.80–1.29 g.cm⁻³. Unsaturated hydraulic conductivity values were about one-third higher within the reduced tillage technology soil processing. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=soil%20crusting%20processing" title="soil crusting processing">soil crusting processing</a>, <a href="https://publications.waset.org/abstracts/search?q=unsaturated%20hydraulic%20conductivity" title=" unsaturated hydraulic conductivity"> unsaturated hydraulic conductivity</a>, <a href="https://publications.waset.org/abstracts/search?q=cumulative%20infiltration" title=" cumulative infiltration"> cumulative infiltration</a>, <a href="https://publications.waset.org/abstracts/search?q=bulk%20density" title=" bulk density"> bulk density</a>, <a href="https://publications.waset.org/abstracts/search?q=porosity" title=" porosity"> porosity</a> </p> <a href="https://publications.waset.org/abstracts/75019/the-influence-of-different-technologies-on-the-infiltration-properties-and-soil-surface-crusting-processing-in-the-north-bohemia-region" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/75019.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">247</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1674</span> Effect of Fiber Inclusion on the Geotechnical Parameters of Clayey Soil Subjected to Freeze-Thaw Cycles</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Arun%20Prasad">Arun Prasad</a>, <a href="https://publications.waset.org/abstracts/search?q=P.%20B.%20Ramudu"> P. B. Ramudu</a>, <a href="https://publications.waset.org/abstracts/search?q=Deep%20Shikha"> Deep Shikha</a>, <a href="https://publications.waset.org/abstracts/search?q=Deep%20Jyoti%20Singh"> Deep Jyoti Singh</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A number of studies have been conducted recently to investigate the influence of randomly oriented fibers on some engineering properties of cohesive soils.Freezing and thawing of soil affects the strength, durability and permeability of soil adversely. Experiments were carried out in order to investigate the effect of inclusion of randomly distributed polypropylene fibers on the strength, hydraulic conductivity and durability of local soil (CL) subjected to freeze–thaw cycles. For evaluating the change in strength of soil, a series of unconfined compression tests as well as tri-axial tests were carried out on reinforced and unreinforced soil samples. All the samples were subjected to seven cycles of freezing and thawing. Freezing was carried out at a temperature of - 15 to -18 °C; and thawing was carried out by keeping the samples at room temperature. The reinforcement of soil samples was done by mixing with polypropylene fibers, 12 mm long and with an aspect ratio of 240. The content of fibers was varied from 0.25 to 1% by dry weight of soil. The maximum strength of soil was found in samples having a fiber content of 0.75% for all the samples that were prepared at optimum moisture content (OMC), and if the OMC was increased (+2% OMC) or decreased (-2% OMC), the maximum strength observed at 0.5% fiber inclusion. The effect of fiber inclusion and freeze–thaw on the hydraulic conductivity was studied increased from around 25 times to 300 times that of the unreinforced soil, without subjected to any freeze-thaw cycles. For studying the increased durability of soil, mass loss after each freeze-thaw cycle was calculated and it was found that samples reinforced with polypropylene fibers show 50-60% less loss in weight than that of the unreinforced soil. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=fiber%20reinforcement" title="fiber reinforcement">fiber reinforcement</a>, <a href="https://publications.waset.org/abstracts/search?q=freezingand%20thawing" title=" freezingand thawing"> freezingand thawing</a>, <a href="https://publications.waset.org/abstracts/search?q=hydraulic%20conductivity" title=" hydraulic conductivity"> hydraulic conductivity</a>, <a href="https://publications.waset.org/abstracts/search?q=unconfined%20compressive%20strength" title=" unconfined compressive strength"> unconfined compressive strength</a> </p> <a href="https://publications.waset.org/abstracts/16429/effect-of-fiber-inclusion-on-the-geotechnical-parameters-of-clayey-soil-subjected-to-freeze-thaw-cycles" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/16429.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">400</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1673</span> Advancements in Hydraulic Fracturing for Unconventional Resources</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Salar%20Ahmed%20Ali">Salar Ahmed Ali</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Hydraulic fracturing has revolutionized the extraction of unconventional oil and gas resources, significantly increasing global energy reserves. This paper explores recent advancements in hydraulic fracturing technologies, focusing on the integration of real-time monitoring systems, environmentally friendly fracturing fluids, and nanotechnology applications. Case studies demonstrate how innovative approaches have enhanced resource recovery while minimizing environmental impact and operational costs. Additionally, the paper addresses challenges such as induced seismicity and regulatory constraints, proposing solutions to ensure sustainable development. These advancements promise to make hydraulic fracturing more efficient, sustainable, and adaptable to the evolving energy landscape. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=oil" title="oil">oil</a>, <a href="https://publications.waset.org/abstracts/search?q=gas" title=" gas"> gas</a>, <a href="https://publications.waset.org/abstracts/search?q=fracture" title=" fracture"> fracture</a>, <a href="https://publications.waset.org/abstracts/search?q=hydraulic" title=" hydraulic"> hydraulic</a> </p> <a href="https://publications.waset.org/abstracts/194790/advancements-in-hydraulic-fracturing-for-unconventional-resources" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/194790.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">9</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1672</span> Soft Ground Improved by Prefabricated Vertical Drains with Vacuum and Thermal Preloading</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Gia%20Lam%20Le">Gia Lam Le</a>, <a href="https://publications.waset.org/abstracts/search?q=Dennis%20T.%20Bergado"> Dennis T. Bergado</a>, <a href="https://publications.waset.org/abstracts/search?q=Thi%20Ngoc%20Truc%20Nguyen"> Thi Ngoc Truc Nguyen</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This study focuses on behaviors of improved soft clay using prefabricated vertical drain (PVD) combined with vacuum and electro-osmotic preloading. Large-scale consolidations of reconstituted soft Bangkok clay were conducted for PVD improvement with vacuum (vacuum-PVD), and vacuum combined with heat (vacuum-thermo-PVD). The research revealed that vacuum-thermo-PVD gives high efficiency of the consolidation rate compared to the vacuum-PVD. In addition, the magnitude of settlement of the specimen improved by the vacuum-thermo-PVD is higher than the vacuum-PVD because the assistance of heat causes the collapse of the clay structure. Particularly, to reach 90% degree of consolidation, the thermal-vacuum-PVD reduced about 58% consolidation time compared to the vacuum-PVD. The increase in consolidation rate is resulted from the increase in horizontal coefficient of consolidation, Ch, the reduction of the smear effect expressed by the ratio of the horizontal hydraulic conductivity in the undisturbed zone, kh, and the horizontal hydraulic conductivity in the smeared zone, ks. Furthermore, the shear strength, Su, increased about 100% when compared using the vacuum-thermal-PVD to the vacuum PVD. In addition, numerical simulations gave reasonable results compared to the laboratory data. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=PVD%20improvement" title="PVD improvement">PVD improvement</a>, <a href="https://publications.waset.org/abstracts/search?q=vacuum%20preloading" title=" vacuum preloading"> vacuum preloading</a>, <a href="https://publications.waset.org/abstracts/search?q=prefabricated%20vertical%20drain" title=" prefabricated vertical drain"> prefabricated vertical drain</a>, <a href="https://publications.waset.org/abstracts/search?q=thermal%20PVD" title=" thermal PVD"> thermal PVD</a> </p> <a href="https://publications.waset.org/abstracts/73298/soft-ground-improved-by-prefabricated-vertical-drains-with-vacuum-and-thermal-preloading" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/73298.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">465</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1671</span> Energy Efficient Alternate Hydraulic System Called TejHydroLift</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Tejinder%20Singh">Tejinder Singh</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper describes a new more efficient Hydraulic System which uses lesser work to produce more output. Conventional Hydraulic System like Hydraulic Lifts and Rams use lots of water to be pumped to produce output. TejHydroLift will do the equal amount of force with lesser input of water. The paper will show that force applied can be increased manifold without requiring to move smaller force by more distance which used to be required in Conventional Hydraulic Lifts. The paper describes one of the configurations of TejHydroLift System called “Slim Antenna TejHydroLift Configuration”. The TejHydroLift uses lesser water and hence demands lesser work to be performed to move the same load. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=alternate" title="alternate">alternate</a>, <a href="https://publications.waset.org/abstracts/search?q=hydraulic%20system" title=" hydraulic system"> hydraulic system</a>, <a href="https://publications.waset.org/abstracts/search?q=efficient" title=" efficient"> efficient</a>, <a href="https://publications.waset.org/abstracts/search?q=TejHydroLift" title=" TejHydroLift"> TejHydroLift</a> </p> <a href="https://publications.waset.org/abstracts/31551/energy-efficient-alternate-hydraulic-system-called-tejhydrolift" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/31551.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">260</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1670</span> Biotechnological Methods for the Grouting of the Tunneling Space</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=V.%20Ivanov">V. Ivanov</a>, <a href="https://publications.waset.org/abstracts/search?q=J.%20Chu"> J. Chu</a>, <a href="https://publications.waset.org/abstracts/search?q=V.%20Stabnikov"> V. Stabnikov</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Different biotechnological methods for the production of construction materials and for the performance of construction processes in situ are developing within a new scientific discipline of Construction Biotechnology. The aim of this research was to develop and test new biotechnologies and biotechnological grouts for the minimization of the hydraulic conductivity of the fractured rocks and porous soil. This problem is essential to minimize flow rate of groundwater into the construction sites, the tunneling space before and after excavation, inside levies, as well as to stop water seepage from the aquaculture ponds, agricultural channels, radioactive waste or toxic chemicals storage sites, from the landfills or from the soil-polluted sites. The conventional fine or ultrafine cement grouts or chemical grouts have such restrictions as high cost, viscosity, sometime toxicity but the biogrouts, which are based on microbial or enzymatic activities and some not expensive inorganic reagents, could be more suitable in many cases because of lower cost and low or zero toxicity. Due to these advantages, development of biotechnologies for biogrouting is going exponentially. However, most popular at present biogrout, which is based on activity of urease- producing bacteria initiating crystallization of calcium carbonate from calcium salt has such disadvantages as production of toxic ammonium/ammonia and development of high pH. Therefore, the aim of our studies was development and testing of new biogrouts that are environmentally friendly and have low cost suitable for large scale geotechnical, construction, and environmental applications. New microbial biotechnologies have been studied and tested in the sand columns, fissured rock samples, in 1 m3 tank with sand, and in the pack of stone sheets that were the models of the porous soil and fractured rocks. Several biotechnological methods showed positive results: 1) biogrouting using sequential desaturation of sand by injection of denitrifying bacteria and medium following with biocementation using urease-producing bacteria, urea and calcium salt decreased hydraulic conductivity of sand to 2×10-7 ms-1 after 17 days of treatment and consumed almost three times less reagents than conventional calcium-and urea-based biogrouting; 2) biogrouting using slime-producing bacteria decreased hydraulic conductivity of sand to 1x10-6 ms-1 after 15 days of treatment; 3) biogrouting of the rocks with the width of the fissures 65×10-6 m using calcium bicarbonate solution, that was produced from CaCO3 and CO2 under 30 bars pressure, decreased hydraulic conductivity of the fissured rocks to 2×10-7 ms-1 after 5 days of treatment. These bioclogging technologies could have a lot of advantages over conventional construction materials and processes and can be used in geotechnical engineering, agriculture and aquaculture, and for the environmental protection. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=biocementation" title="biocementation">biocementation</a>, <a href="https://publications.waset.org/abstracts/search?q=bioclogging" title=" bioclogging"> bioclogging</a>, <a href="https://publications.waset.org/abstracts/search?q=biogrouting" title=" biogrouting"> biogrouting</a>, <a href="https://publications.waset.org/abstracts/search?q=fractured%20rocks" title=" fractured rocks"> fractured rocks</a>, <a href="https://publications.waset.org/abstracts/search?q=porous%20soil" title=" porous soil"> porous soil</a>, <a href="https://publications.waset.org/abstracts/search?q=tunneling%20space" title=" tunneling space"> tunneling space</a> </p> <a href="https://publications.waset.org/abstracts/44271/biotechnological-methods-for-the-grouting-of-the-tunneling-space" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/44271.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">208</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1669</span> Hydraulic Analysis of Irrigation Approach Channel Using HEC-RAS Model</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Muluegziabher%20Semagne%20Mekonnen">Muluegziabher Semagne Mekonnen</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This study was intended to show the irrigation water requirements and evaluation of canal hydraulics steady state conditions to improve on scheme performance of the Meki-Ziway irrigation project. The methodology used was the CROPWAT 8.0 model to estimate the irrigation water requirements of five major crops irrigated in the study area. The results showed that for the whole existing and potential irrigation development area of 2000 ha and 2599 ha, crop water requirements were 3,339,200 and 4,339,090.4 m³, respectively. Hydraulic simulation models are fundamental tools for understanding the hydraulic flow characteristics of irrigation systems. Hydraulic simulation models are fundamental tools for understanding the hydraulic flow characteristics of irrigation systems. In this study Hydraulic Analysis of Irrigation Canals Using HEC-RAS Model was conducted in Meki-Ziway Irrigation Scheme. The HEC-RAS model was tested in terms of error estimation and used to determine canal capacity potential. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=HEC-RAS" title="HEC-RAS">HEC-RAS</a>, <a href="https://publications.waset.org/abstracts/search?q=irrigation" title=" irrigation"> irrigation</a>, <a href="https://publications.waset.org/abstracts/search?q=hydraulic.%20canal%20reach" title=" hydraulic. canal reach"> hydraulic. canal reach</a>, <a href="https://publications.waset.org/abstracts/search?q=capacity" title=" capacity"> capacity</a> </p> <a href="https://publications.waset.org/abstracts/183197/hydraulic-analysis-of-irrigation-approach-channel-using-hec-ras-model" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/183197.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge 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