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The procedure accounts for the errors in seismic tomography inversion and for the correlation of such errors. The proposed methodology consists of two steps: (1) the cross-variogram inference is carried out using only the data at the wellbore (both hydraulic and seismic); (2) a co-kriging procedure takes the cross-well data into account to interpolate between boreholes. No postulated a-priori relationship is needed. In order to illustrate the methodology a synthetic data set is generated on the basis of evidence from published case studies and simplified physical considerations. The numerical experiments show that the choice of the excitation frequency is critical. A trade-off exists between the need for a highresolution survey (asking for higher freqencies) and the need for a good correlation between hydraulic conductivity and seismic properties (asking for frequencies below the squirt frequency of the medium). In the simulation using seismic data with the best excitation frequency (1 kHz in this case), the mean squared error of the hydraulic conductivity estimate is twothirds lower than using hydraulic data alone. It is important to note also that only a part of the interwell region is adequately sampled by the tomographic experiment. Such a region can be readily identified by calculating the energy of the quasi-null space, through singular value decomposition of the tomographic matrix. In planning this type of experiments, it is necessary to carefully verify case by case whether the adopted range of high frequencies does not prevent the seismic energy from propagating effectively from sources to receivers.","publication_date":"1998,,","publication_name":"Journal of Hydrology","grobid_abstract_attachment_id":"100754455"},"document_type":"paper","pre_hit_view_count_baseline":null,"quality":"high","language":"en","title":"A geostatistical framework for incorporating seismic tomography auxiliary data into hydraulic conductivity estimation","broadcastable":false,"draft":null,"has_indexable_attachment":true,"indexable":true}}["work"]; window.loswp.workCoauthors = [29586915]; window.loswp.locale = "en"; window.loswp.countryCode = "SG"; window.loswp.cwvAbTestBucket = ""; window.loswp.designVariant = "ds_vanilla"; window.loswp.fullPageMobileSutdModalVariant = "control"; window.loswp.useOptimizedScribd4genScript = false; window.loswp.appleClientId = 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data-client_id="331998490334-rsn3chp12mbkiqhl6e7lu2q0mlbu0f1b" data-doc_id="100754455" data-landing_url="https://www.academia.edu/99747822/A_geostatistical_framework_for_incorporating_seismic_tomography_auxiliary_data_into_hydraulic_conductivity_estimation" data-login_uri="https://www.academia.edu/registrations/google_one_tap" data-moment_callback="onGoogleOneTapEvent" id="g_id_onload"></div><div class="ds-top-related-works--grid-container"><div class="ds-related-content--container ds-top-related-works--container"><h2 class="ds-related-content--heading">Related papers</h2><div class="ds-related-work--container js-wsj-grid-card" data-collection-position="0" data-entity-id="36422806" data-sort-order="default"><a class="ds-related-work--title js-wsj-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/36422806/Joint_Use_of_Seismic_and_Electromagnetic_Methods_in_Geophysical_Surveys">Joint Use of Seismic and Electromagnetic Methods in Geophysical Surveys</a><div class="ds-related-work--metadata"><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="80620464" href="https://independent.academia.edu/MicheleIodice">Michele Iodice</a></div><p class="ds-related-work--abstract ds2-5-body-sm">Multi-channel Analysis of Surface Waves (MASW) is a seismic wave propagation method which involves the measurement of Rayleigh waves propagating along the surface of a medium. The method is non-intrusive, fast and practical and it has been successfully utilized for the in-situ evaluation of shear modulus and layer thicknesses of soils and, more recently, pavement systems. The method is also widely utilized as a tool for monitoring stiffness during construction, for maintenance inspections and even for the detection of voids and sinkholes. Time Domain Reflectometry (TDR) is an electromagnetic method based on the measurement of the propagation velocity of a step voltage pulse along a probe inserted in the soil. Electrical properties of the soil, i.e. dielectric permittivity and bulk electrical conductivity, are determined and can be related to some geotechnical properties, e.g. the volumetric water content and potentially the soil density. Seismic wave propagation methods such as MASW are sometimes used in conjunction with electromagnetic methods, in an attempt to reduce the uncertainty associated with each individual method, and to provide an enhanced characterization of the investigated soil. It is still unknown however, whether they are mostly complementary methods or whether they share the assessment of common mechanical/geotechnical properties. In this work the potential and the limitations of the joint use of the MASW and TDR techniques were investigated through an in-situ near-surface programme measurement at two different soil sites, up to a depth of 1 metre. A Dynamic Cone Penetrometer test was performed and the Particle Size Distribution curve determined to extend the soil characterization, and where possible soil samples were taken at various depths in order to measure the dry density and the volumetric water content. The two techniques measured similar trends, augmenting the results obtained by each method and showing the potential for an enhanced and more complete assessment of the soil properties. In addition, bulk electrical conductivity was shown to be related to the shear modulus for the soils studied. 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Bard</a></div><p class="ds-related-work--metadata ds2-5-body-xs">Proceedings 76th EAGE Conference and Exhibition Workshops, 2014</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"The Interpacific Project - A Cooperative Exercise for Assessing Reliability and Accuracy of Seismic Methods","attachmentId":94814193,"attachmentType":"pdf","work_url":"https://www.academia.edu/91561473/The_Interpacific_Project_A_Cooperative_Exercise_for_Assessing_Reliability_and_Accuracy_of_Seismic_Methods","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-related-work-grid-card-view-pdf" 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href="https://www.academia.edu/23492344/Field_experiment_in_Soultz_sous_For%C3%AAts_1993_Changes_of_the_pattern_of_induced_seismicity">Field experiment in Soultz-sous-Forêts, 1993: Changes of the pattern of induced seismicity</a><div class="ds-related-work--metadata"><a class="js-related-work-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="45423855" href="https://independent.academia.edu/VladimirSmirnov10">Vladimir Smirnov</a><span>, </span><a class="js-related-work-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="45479587" href="https://independent.academia.edu/APonomarev1">Alexander Ponomarev</a></div><p class="ds-related-work--metadata ds2-5-body-xs">Acta Geophysica, 2013</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Field experiment in Soultz-sous-Forêts, 1993: Changes of the pattern of induced 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Swart</a></div><p class="ds-related-work--metadata ds2-5-body-xs">Proceedings of the Ocean Drilling Program, 1997</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Site Survey and Underway Geophysics","attachmentId":114074023,"attachmentType":"pdf","work_url":"https://www.academia.edu/118450187/Site_Survey_and_Underway_Geophysics","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-related-work-grid-card-view-pdf" href="https://www.academia.edu/118450187/Site_Survey_and_Underway_Geophysics"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-related-work-sidebar-card" data-collection-position="17" data-entity-id="82745672" data-sort-order="default"><a class="ds-related-work--title js-related-work-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/82745672/THIS_COMMUNICATION_IS_CANCELLED_PAPER_IS_AVAILABLE_Laboratory_benchmarks_vs_Synthetic_modeling_of_seismic_wave_propagation_in_complex_environments_BENCHIE_Project_">THIS COMMUNICATION IS CANCELLED (PAPER IS AVAILABLE). 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