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c-sort__page-input"><label for="c-sort2">Show:</label><select name="rows" id="c-sort2" form="facetForm"><option selected="" value="10">10</option><option value="20">20</option><option value="30">30</option><option value="40">40</option><option value="50">50</option><option value="100">100</option></select></div></div><input type="hidden" name="start" form="facetForm" value="0"/><nav class="c-pagination--next"><ul><li><a href="" aria-label="you are on result set 1" class="c-pagination__item--current">1</a></li><li><a href="" aria-label="go to result set 2" class="c-pagination__item">2</a></li><li><a href="" aria-label="go to result set 3" class="c-pagination__item">3</a></li><li><a href="" aria-label="go to result set 4" class="c-pagination__item">4</a></li><li><a href="" aria-label="go to result set 32" class="c-pagination__item">32</a></li><li class="c-pagination__next"><a href="" aria-label="go to Next result set">Next</a></li></ul></nav></div><section class="c-scholworks"><div class="c-scholworks__main-column"><ul class="c-scholworks__tag-list"><li class="c-scholworks__tag-article">Article</li><li class="c-scholworks__tag-peer">Peer Reviewed</li></ul><div><h3 class="c-scholworks__heading"><a href="/uc/item/7sm3323z"><div class="c-clientmarkup">Approach to Control the Depth of Water in Basin Irrigation and Wetland Flooding</div></a></h3></div><div class="c-authorlist"><ul class="c-authorlist__list"><li class="c-authorlist__begin"><a href="/search/?q=author%3ALo%C3%A1iciga%2C%20Hugo%20A">Loáiciga, Hugo A</a> </li></ul></div><div class="c-scholworks__publication"><a href="/uc/ucsb_postprints">UC Santa Barbara Previously Published Works</a> (2007)</div><div class="c-scholworks__abstract"><div class="c-clientmarkup">The controlled ponding of water over level terrain in basin irrigation or wetland flooding is described quantitatively as a three-phase process. During the first phase, water is applied at a known rate until ponding emerges at the time of ponding initiation. In the second phase, water continues to be applied at the same rate until a desired ponded depth is attained. In the third phase, water is applied to maintain the desired ponded depth during an arbitrarily long period. The desired ponded depth is maintained by adjusting the water-application rate to equal the infiltration rate plus the evaporation rate. The time of ponding, the ordinary differential equations (ODEs) governing cumulative infiltration during the second and third phases, and the water-application rate during the third phase are derived in this work using an extended Green-and-Ampt formulation of infiltration. Computational examples illustrate the solutions of the derived ODEs and their application in the control of basin irrigation and wetland flooding. © 2007 ASCE.</div></div><div class="c-scholworks__media"><ul class="c-medialist"></ul></div></div><div class="c-scholworks__ancillary"><a class="c-scholworks__thumbnail" href="/uc/item/7sm3323z"><img src="/cms-assets/875263501b51004c4c6efd29e6dfeb1e251909037349056cdd08b1d98e6e08bf" alt="Cover page: Approach to Control the Depth of Water in Basin Irrigation and Wetland Flooding"/></a></div></section><section class="c-scholworks"><div class="c-scholworks__main-column"><ul class="c-scholworks__tag-list"><li class="c-scholworks__tag-article">Article</li><li class="c-scholworks__tag-peer">Peer Reviewed</li></ul><div><h3 class="c-scholworks__heading"><a href="/uc/item/3gw40784"><div class="c-clientmarkup">Aquifer storage capacity and maximum annual yield from long-term aquifer fluxes</div></a></h3></div><div class="c-authorlist"><ul class="c-authorlist__list"><li class="c-authorlist__begin"><a href="/search/?q=author%3ALo%C3%A1iciga%2C%20Hugo%20A">Loáiciga, Hugo A</a> </li></ul></div><div class="c-scholworks__publication"><a href="/uc/ucsb_postprints">UC Santa Barbara Previously Published Works</a> (2008)</div><div class="c-scholworks__abstract"><div class="c-clientmarkup">Long-term time series data of aquifer recharge, groundwater extraction, and discharge are used to estimate aquifer storage capacity and maximum annual yield. Aquifer storage capacity is defined as the maximum volume of water that can be stored in an aquifer. It is estimated using a transient water-balance approach. The maximum annual yield is defined as the maximum combined groundwater extraction plus discharge that can be sustained in an aquifer judged by the historical record of recharge. It is determined according to a graphical mass-curve method. These two quantities are useful in aquifer characterization and groundwater management, the apportionment of groundwater rights and aquifer storage and recovery operations being two frequent applications. Time series data from the Edwards Aquifer, Texas, USA, illustrate the application of the methods presented. © Springer-Verlag 2007.</div></div><div class="c-scholworks__media"><ul class="c-medialist"></ul></div></div><div class="c-scholworks__ancillary"><a class="c-scholworks__thumbnail" href="/uc/item/3gw40784"><img src="/cms-assets/dbfb6ebdf3457eb2c81c22d9dddeb3591cc82d14bf311d16602f7b966a730096" alt="Cover page: Aquifer storage capacity and maximum annual yield from long-term aquifer fluxes"/></a></div></section><section class="c-scholworks"><div class="c-scholworks__main-column"><ul class="c-scholworks__tag-list"><li class="c-scholworks__tag-article">Article</li><li class="c-scholworks__tag-peer">Peer Reviewed</li></ul><div><h3 class="c-scholworks__heading"><a href="/uc/item/1pt3t1b6"><div class="c-clientmarkup">Sustainable Ground-Water Exploitation</div></a></h3></div><div class="c-authorlist"><ul class="c-authorlist__list"><li class="c-authorlist__begin"><a href="/search/?q=author%3ALo%C3%A1iciga%2C%20Hugo">Loáiciga, Hugo</a> </li></ul></div><div class="c-scholworks__publication"><a href="/uc/ucsb_postprints">UC Santa Barbara Previously Published Works</a> (2002)</div><div class="c-scholworks__abstract"><div class="c-clientmarkup">Principles of sustainable ground-water exploitation are presented in this paper. The renewable and inappropriable nature of ground water is examined in light of the process of recharge. An example illustrates the interplay among ground-water extraction, recharge, natural recharge, and storage. It demonstrates the aquifer-specific characteristics of overdraft and replenishment, which are driven by climatic variability and the rate of ground-water mining. A second example uses game theoretic methodology to quantify the roles of cooperation and non-cooperation on ground-water extraction. The economic and environmental advantages of cooperative ground-water extraction are demonstrated with data from a coastal aquifer. © 2002 Taylor & Francis Group, LLC.</div></div><div class="c-scholworks__media"><ul class="c-medialist"></ul></div></div><div class="c-scholworks__ancillary"><a class="c-scholworks__thumbnail" href="/uc/item/1pt3t1b6"><img src="/cms-assets/0c0490ec3495eabdf9843b969b20ca59e32976fff4198202c93c8ebfa5eee7ce" alt="Cover page: Sustainable Ground-Water Exploitation"/></a></div></section><section class="c-scholworks"><div class="c-scholworks__main-column"><ul class="c-scholworks__tag-list"><li class="c-scholworks__tag-article">Article</li><li class="c-scholworks__tag-peer">Peer Reviewed</li></ul><div><h3 class="c-scholworks__heading"><a href="/uc/item/8wn748z8"><div class="c-clientmarkup">The Importance of Using Probabilistic Effective Hydraulic Conductivity in Darcy's Law and Groundwater Flow Calculations</div></a></h3></div><div class="c-authorlist"><ul class="c-authorlist__list"><li class="c-authorlist__begin"><a href="/search/?q=author%3ALo%C3%A1iciga%2C%20Hugo%20A">Loáiciga, Hugo A</a> </li></ul></div><div class="c-scholworks__publication"><a href="/uc/ucsb_postprints">UC Santa Barbara Previously Published Works</a> (2008)</div><div class="c-scholworks__abstract"><div class="c-clientmarkup">The effective saturated hydraulic conductivity is a parameter that relates the average groundwater specific discharge to the average hydraulic gradient. This paper outlines a procedure to calculate the effective saturated hydraulic conductivity in local-scale groundwater flow. Examples are presented in this work. © 2008 ASCE.</div></div><div class="c-scholworks__media"><ul class="c-medialist"></ul></div></div><div class="c-scholworks__ancillary"><a class="c-scholworks__thumbnail" href="/uc/item/8wn748z8"><img src="/cms-assets/0eeba612385d6079ac7c63b03c1eb645bb76d84667a43091e68ee72b9f12b9a9" alt="Cover page: The Importance of Using Probabilistic Effective Hydraulic Conductivity in Darcy's Law and Groundwater Flow Calculations"/></a></div></section><section class="c-scholworks"><div class="c-scholworks__main-column"><ul class="c-scholworks__tag-list"><li class="c-scholworks__tag-article">Article</li><li class="c-scholworks__tag-peer">Peer Reviewed</li></ul><div><h3 class="c-scholworks__heading"><a href="/uc/item/4f19w1d2"><div class="c-clientmarkup">Groundwater and earthquakes: Screening analysis for slope stability</div></a></h3></div><div class="c-authorlist"><ul class="c-authorlist__list"><li class="c-authorlist__begin"><a href="/search/?q=author%3ALo%C3%A1iciga%2C%20Hugo%20A">Loáiciga, Hugo A</a> </li></ul></div><div class="c-scholworks__publication"><a href="/uc/ucsb_postprints">UC Santa Barbara Previously Published Works</a> (2015)</div><div class="c-scholworks__abstract"><div class="c-clientmarkup">Groundwater is a factor behind the occurrence of landslides, and so is the action of seismic shaking in sloping terrain. This paper presents closed-form expressions for the factor of safety and yield coefficient of slopes subjected simultaneously to seismic forces and variable groundwater conditions. Two failure modes of natural slopes are considered in this work, namely, long slope with phreatic surface parallel to the ground surface and slope with emerging phreatic surface. For these failure modes, the factor of safety and yield coefficient are determined for various conditions of drainage using effective-stress analysis and total-stress analysis. The effect of soil strength reduction by seismic loading is accounted for in the derived factors of safety and yield coefficients. The specification of the lateral seismic coefficient for equivalent seismic loading relies on recent advances in geotechnical earthquake engineering and seismic engineering geology. The role of liquefaction and clay softening is introduced in the analysis of seismic slope stability and slope deformation considering variable groundwater conditions. Several examples illustrate the application of the methods herein presented.</div></div><div class="c-scholworks__media"><ul class="c-medialist"></ul></div></div><div class="c-scholworks__ancillary"><a class="c-scholworks__thumbnail" href="/uc/item/4f19w1d2"><img src="/cms-assets/cef6b3e96b9304979e962fa05254687868f8a370fbd80f18735f65e29bfaa635" alt="Cover page: Groundwater and earthquakes: Screening analysis for slope stability"/></a></div></section><section class="c-scholworks"><div class="c-scholworks__main-column"><ul class="c-scholworks__tag-list"><li class="c-scholworks__tag-article">Article</li><li class="c-scholworks__tag-peer">Peer Reviewed</li></ul><div><h3 class="c-scholworks__heading"><a href="/uc/item/5cp9w4wd"><div class="c-clientmarkup">Consolidation Settlement in Aquifers Caused by Pumping</div></a></h3></div><div class="c-authorlist"><ul class="c-authorlist__list"><li class="c-authorlist__begin"><a href="/search/?q=author%3ALo%C3%A1iciga%2C%20Hugo%20A">Loáiciga, Hugo A</a> </li></ul></div><div class="c-scholworks__publication"><a href="/uc/ucsb_postprints">UC Santa Barbara Previously Published Works</a> (2013)</div><div class="c-scholworks__media"><ul class="c-medialist"></ul></div></div><div class="c-scholworks__ancillary"><a class="c-scholworks__thumbnail" href="/uc/item/5cp9w4wd"><img src="/cms-assets/045f8ec421192b67934af50381bce45df84ae7c7295ad9987cdc4d71dc3af38d" alt="Cover page: Consolidation Settlement in Aquifers Caused by Pumping"/></a></div></section><section class="c-scholworks"><div class="c-scholworks__main-column"><ul class="c-scholworks__tag-list"><li class="c-scholworks__tag-article">Article</li><li class="c-scholworks__tag-peer">Peer Reviewed</li></ul><div><h3 class="c-scholworks__heading"><a href="/uc/item/23w5n53j"><div class="c-clientmarkup">Modern‐age buildup of CO2 and its effects on seawater acidity and salinity</div></a></h3></div><div class="c-authorlist"><ul class="c-authorlist__list"><li class="c-authorlist__begin"><a href="/search/?q=author%3ALo%C3%A1iciga%2C%20Hugo%20A">Loáiciga, Hugo A</a> </li></ul></div><div class="c-scholworks__publication"><a href="/uc/ucsb_postprints">UC Santa Barbara Previously Published Works</a> (2006)</div><div class="c-scholworks__abstract"><div class="c-clientmarkup">The impacts of increases in atmospheric CO2 since the midst of the 18th century on average seawater salinity and acidity are evaluated. Assuming that the rise in the planetary mean surface temperature continues unabated, and that it eventually causes the melting of terrestrial ice and permanent snow, it is calculated that the average seawater salinity would be lowered not more than 0.61‰ from its current 35‰. It is also calculated -using an equilibrium model of aqueous carbonate species in seawater open to the atmosphere- that the increase in atmospheric CO2 from 280 ppmv (representative of 18th-century conditions) to 380 ppmv (representative of current conditions) raises the average seawater acidity approximately 0.09 pH units across the range of seawater temperature considered (0 to 30°C). A doubling of CO2 from 380 ppmv to 760 ppmv (the 2 × CO2 scenario) increases the seawater acidity approximately 0.19 pH units across the same range of seawater temperature. In the latter case, the predicted increase in acidity results in a pH within the water-quality limits for seawater of 6.5 and 8.5 and a change in pH less than 0.20 pH units. This paper's results concerning average seawater salinity and acidity show that, on a global scale and over the time scales considered (hundreds of years), there would not be accentuated changes in either seawater salinity or acidity from the observed or hypothesized rises in atmospheric CO2 concentrations. Copyright 2006 by the American Geophysical Union.</div></div><div class="c-scholworks__media"><ul class="c-medialist"></ul></div></div><div class="c-scholworks__ancillary"><a class="c-scholworks__thumbnail" href="/uc/item/23w5n53j"><img src="/cms-assets/c3c3e861b521f2f492637ffcb5b5e7350980c9c1c16edd113557053b681ac70b" alt="Cover page: Modern‐age buildup of CO2 and its effects on seawater acidity and salinity"/></a></div></section><section class="c-scholworks"><div class="c-scholworks__main-column"><ul class="c-scholworks__tag-list"><li class="c-scholworks__tag-article">Article</li><li class="c-scholworks__tag-peer">Peer Reviewed</li></ul><div><h3 class="c-scholworks__heading"><a href="/uc/item/2bc9s2hq"><div class="c-clientmarkup">Comment on “The persistence of the water budget myth and its relationship to sustainability” by J.F. Devlin and M. Sophocleous, Hydrogeology Journal (2005) 13:549–554</div></a></h3></div><div class="c-authorlist"><ul class="c-authorlist__list"><li class="c-authorlist__begin"><a href="/search/?q=author%3ALo%C3%A1iciga%2C%20Hugo%20A">Loáiciga, Hugo A</a> </li></ul></div><div class="c-scholworks__publication"><a href="/uc/ucsb_postprints">UC Santa Barbara Previously Published Works</a> (2006)</div><div class="c-scholworks__media"><ul class="c-medialist"></ul></div></div><div class="c-scholworks__ancillary"><a class="c-scholworks__thumbnail" href="/uc/item/2bc9s2hq"><img src="/cms-assets/ef133a2de0bdcdfb697cf7c5f9eea81f9badee1913e9644a7ec46bc94da1102f" alt="Cover page: Comment on “The persistence of the water budget myth and its relationship to sustainability” by J.F. Devlin and M. Sophocleous, Hydrogeology Journal (2005) 13:549–554"/></a></div></section><section class="c-scholworks"><div class="c-scholworks__main-column"><ul class="c-scholworks__tag-list"><li class="c-scholworks__tag-article">Article</li><li class="c-scholworks__tag-peer">Peer Reviewed</li></ul><div><h3 class="c-scholworks__heading"><a href="/uc/item/05j8c5jx"><div class="c-clientmarkup">Derivation Approaches for the Theis (1935) Equation</div></a></h3></div><div class="c-authorlist"><ul class="c-authorlist__list"><li class="c-authorlist__begin"><a href="/search/?q=author%3ALo%C3%A1iciga%2C%20Hugo%20A">Loáiciga, Hugo A</a> </li></ul></div><div class="c-scholworks__publication"><a href="/uc/ucsb_postprints">UC Santa Barbara Previously Published Works</a> (2010)</div><div class="c-scholworks__media"><ul class="c-medialist"></ul></div></div><div class="c-scholworks__ancillary"><a class="c-scholworks__thumbnail" href="/uc/item/05j8c5jx"><img src="/cms-assets/d86745516eae22f9803e41bd72daafe5e97921da03e250874a89381ef31b4559" alt="Cover page: Derivation Approaches for the Theis (1935) Equation"/></a></div></section><section class="c-scholworks"><div class="c-scholworks__main-column"><ul class="c-scholworks__tag-list"><li class="c-scholworks__tag-article">Article</li><li class="c-scholworks__tag-peer">Peer Reviewed</li></ul><div><h3 class="c-scholworks__heading"><a href="/uc/item/0r74444p"><div class="c-clientmarkup">Ground-Water/Surface-Water Interactions in a Karst Aquifer</div></a></h3></div><div class="c-authorlist"><ul class="c-authorlist__list"><li class="c-authorlist__begin"><a href="/search/?q=author%3ALo%C3%A1iciga%2C%20Hugo%20A">Loáiciga, Hugo A</a> </li></ul></div><div class="c-scholworks__publication"><a href="/uc/ucsb_postprints">UC Santa Barbara Previously Published Works</a> (2001)</div><div class="c-scholworks__abstract"><div class="c-clientmarkup">Ground-water/surface-water interactions in of the largest aquifer systems in the United States were analyzed in this article. The Edwards karst aquifer of Texas exhibits unique ground-water recharge processes. It is also located in a region of pronounced precipitation variability, the dominant controlling factor of ground-water recharge. The evolution of ground-water storage effected by recharge, pumping, and spring flow in the Edwards Aquifer has provided new evidence about the role of hydrologic, climatic, ecologic, and social factors in the determination of sustainable aquifer management policies. Historical data and numerical simulations were used to analyze pumping impacts within an integrated framework of sustainable aquifer production. © 2001 American Society of Civil Engineers.</div></div><div class="c-scholworks__media"><ul class="c-medialist"></ul></div></div><div class="c-scholworks__ancillary"><a class="c-scholworks__thumbnail" href="/uc/item/0r74444p"><img src="/cms-assets/9fe22c5cc8bf479426adf6170c54f3c9af2c55274bc403de599bc017d9b436be" alt="Cover page: Ground-Water/Surface-Water Interactions in a Karst Aquifer"/></a></div></section><nav class="c-pagination--next"><ul><li><a href="" aria-label="you are on result set 1" class="c-pagination__item--current">1</a></li><li><a href="" aria-label="go to result set 2" class="c-pagination__item">2</a></li><li><a href="" aria-label="go to result set 3" class="c-pagination__item">3</a></li><li><a href="" aria-label="go to result set 4" class="c-pagination__item">4</a></li><li><a href="" aria-label="go to result set 32" class="c-pagination__item">32</a></li><li class="c-pagination__next"><a href="" aria-label="go to Next result set">Next</a></li></ul></nav></section></main></form></div><div><div class="c-toplink"><a href="javascript:window.scrollTo(0, 0)">Top</a></div><footer class="c-footer"><nav class="c-footer__nav"><ul><li><a href="/">Home</a></li><li><a href="/aboutEschol">About eScholarship</a></li><li><a href="/campuses">Campus Sites</a></li><li><a href="/ucoapolicies">UC Open Access Policy</a></li><li><a href="/publishing">eScholarship Publishing</a></li><li><a href="https://www.cdlib.org/about/accessibility.html">Accessibility</a></li><li><a href="/privacypolicy">Privacy Statement</a></li><li><a href="/policies">Site Policies</a></li><li><a href="/terms">Terms of Use</a></li><li><a href="/login"><strong>Admin Login</strong></a></li><li><a href="https://help.escholarship.org"><strong>Help</strong></a></li></ul></nav><div class="c-footer__logo"><a href="/"><img class="c-lazyimage" data-src="/images/logo_footer-eschol.svg" alt="eScholarship, University of California"/></a></div><div class="c-footer__copyright">Powered by the<br/><a href="http://www.cdlib.org">California Digital Library</a><br/>Copyright © 2017<br/>The Regents of the University of California</div></footer></div></div></div></div> <script src="/js/vendors~app-bundle-2aefc956e545366a5d4e.js"></script> <script src="/js/app-bundle-4477d7630fb8c6f70662.js"></script> </body> </html>