Detection of Karst Aquifer Structure by 3D Electric Resistivity Tomography (ERT)
Karst aquifersare complex systems with a high degree of heterogeneity.Characterization of karst aquifer structure is significant forunderstanding and modelingkarst hydrological processes.Electric Resistivity Tomography (ERT) is recognized as an effective technique to detect karstic voids.In order to estimate the subsurface resistivity distribution,ERT is employed at a hillslope of a Karst Critical Zone Observatory (Chenqi watershed, Guizhou province, China).The results show that there is a strong association between resistivity anomalies and known karstic structures.According to the wedge structure of low resistivity in the hillslope and geological background, the location of a Marlstone layer is estimated, which is confirmed by inversing synthetic ERTdata.This study finds that the Marlstone layer is strongly related to the formation cause of springs possibly because of the properties of Marlstone, i.e.low permeability.After comparison of the resistivity distribution and the hydrological dynamical processes, this study findthat in the low resistivity zone, the water storage capacity of aquiferis high.
3D ERT Karstic Aquifer Spring CZO Marlstone
Qinbo Cheng Andrew Binley Xi Chen Yongyu Xie Runrun Zhang Zhicai Zhang Mi Tao Man Gao
College of Hydrology and Water Resources, Hohai University, Nanjing, 210098, China;Lancaster Environ Lancaster Environment Centre, Lancaster University, Lancaster, LA 1 4YQ, United Kingdom State Key Laboratory of Hydrology Water Resources and Hydraulic Engineering, Hohai University,Nanjin College of Hydrology and Water Resources, Hohai University, Nanjing, 210098, China
国际会议
杭州
英文
342-347
2018-06-10（万方平台首次上网日期，不代表论文的发表时间）