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Comparison of Hydraulic Tomography and Kriging for Estimating Hydraulic Conductivity of a Heterogeneous Aquifer

Jiang Liqun;Sun Ronglin;Wang Wenmei;Wang Jiangsi;School of Environmental Studies,China University of Geosciences;Hainan Investigation Institute of Hydrogeology and Engineering Geology;  
Characterization of the spatial distributions of aquifer heterogeneity is the premise of accurately simulating groundwater flow and contaminant migration.Based on the laboratory sandbox test of a synthetic heterogeneous aquifer,hydraulic tomography and kriging are used to characterize hydraulic conductivity(K)of the heterogeneous aquifer in this study.The results show that:(1)Compared with kriging,hydraulic tomography can get higher precision to characterize the K field and predict groundwater flow process of the heterogeneous aquifer;(2)in the pumping tests of hydraulic tomography,increasing the number of pumping tests can effectively improve accuracy of inversion of hydraulic tomography,however,after reaching a certain degree,increasing the number of pumping test can not significantly improve the effect of the parameter inversion.Subsequently,it is necessary to further research the appropriate number of pumping tests of hydraulic tomography for further optimizing pumping wells.
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