Spatial Variation of Hydraulic Conductivity Categories in a Highly Heterogeneous Aquifer： A Case Study in the North China Plain (NCP)

作     者：Rong Ma Jiansheng Shi Xianyao Shi 

作者机构：State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Hohai University Nanjing 210098 China Institute of Hydrogeology and Environmental Geology Shijiazhuang 050061 China China Geological Survey Beijing 100037 China 

出 版 物：《Journal of Earth Science》 (地球科学学刊（英文版）)

年 卷 期：2017年第28卷第1期

页      面：113-123页

核心收录：

学科分类：081803[工学-地质工程] 08[工学] 0818[工学-地质资源与地质工程] 09[农学] 0901[农学-作物学] 

基　　金：supported by the Geological Survey Projects Foundation of Institute of Hydrogeology and Environmental Geology (Nos.SK201504 and G201503) the China Postdoctoral Science Foundation (No.2015M571658) the National Natural Science Foundation of China (No.41502248) 

主　　题：clay fraction content hydraulic conductivity variation depositional environment uni-formity coefficient 

摘      要：Compared with research on spatial variation of hydraulic conductivity（K）, less effort has been made researching different grades of K value in the North China Plain（NCP）. In this study, 3D spatial distribution models of different grades of K were established by considering the effects of clay fraction content and uniformity coefficient（Cu）. The K value can be divided into five grades： very low, low, permeable, high, and very high groups. The volume percentages of these clusters were 3.06%, 36.01%, 55.70%, 4.82%, and 0.41% for the first aquifer; 0.016%, 9.56%, 88.25%, 2.16%, and 0.014% for the second aquifer; and 0.04%, 17.74%, 84.21%, 0.001%, and 0.01% for the third aquifer. It is concluded that the high and very high K values are fully affected by burial depth and that the very low, low, and permeable K values are mainly controlled by depositional environment and are partially influenced by burial depth. The burial depth became the main influencing factor only within the same depositional environment, causing the overall K to decrease with depth. The variations of very low, low, permeable, high, and very high categories of K values with depth are described in this study. This can provide useful information for non-technical decision makers to achieve sustainable development of deep groundwater resources.