Heterogeneous reservoir seepage characterized by geophysical, hydrochemical, and hydrologic methods

• DOI: 10.1190/geo2024-0199.1
• Publication Date: 2024-06-17T12:26:39Z
• Authors: Deqiang Mao; Yaxun Wang; Qifeng Guo; Dianji Li; Shiliang Liu; Jian Meng; Leijian Hu

Seepage characterization from reservoirs is challenging for various environmental and water resource applications. Nonintrusive geophysical methods can achieve excellent detection results, but they cannot provide a quantitative description of the amount seepage. Integrating with traditional hydrochemical hydrologic enables simultaneous localization analysis heterogeneous reservoir Ground waterborne electrical resistivity tomography are used to scan under typical cutoff wall antiseepage system, measurements reveal northern preferential infiltration area. The results that seepage bypass has led evident ion concentration variations in groundwater near dam. Based on geologic stratum information, system divided into three scenarios numerical simulation calculate total over 15 months approximately 7.15 × 10 6 m 3 , which consistent budget methods. However, part reservoir, only 27% entire dam contributes 77% All have confirmed caused by absence an seal region, should be primary focus future monitoring operational efforts. With undergoing extensive cross-validation, preceding comprehensively leveraged, effectively lowering uncertainties overcoming limitations quantitatively characterizing