The research of three-dimensional numerical simulation of groundwater-flow: taking the Ejina Basin, Northwest China as example

作     者：Qi Feng 1,2, HaiYang Xi 1, Wei Liu 1,3, JianHua Si 1,2, ZongQiang Chang 1,2, YongHong Su 1,2 1. Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China. 2. Alashan Desert Eco-hydrology Experimental Research Station, Lanzhou, Gansu 730000, China. 3. State Key Laboratory of Hydrosciences and Engineering, Tsinghua University, Beijing 100084, China. 

作者机构：Chinese Acad Sci Cold & Arid Reg Environm & Engn Res Inst 320 West Donggang Rd Lanzhou 730000 Gansu Peoples R China Alashan Desert Ecohydrol Expt Res Stn Lanzhou 730000 Gansu Peoples R China Tsinghua Univ State Key Lab Hydrosci & Engn Beijing 100084 Peoples R China 

出 版 物：《Research in Cold and Arid Regions》 (寒旱区科学（英文版）)

年 卷 期：2009年第1卷第3期

页      面：238-248页

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] 0705[理学-地理学] 

基　　金：Financial support for this study is from National Natural Science Funds for Distinguished Young Scholar (40725001) National Natural Science Foundation of China (40671010) co-sponsored fellowship are gratefully acknowledged 

主　　题：groundwater flow model Ejina Basin MODFLOW Heihe River 

摘      要：Water is a primary controlling factor for economic development and ecological environmental protection in the inland river basins of arid western China. And it is groundwater, as the most important component of total water resources, that plays a dominant role in the development of western China. In recent years, the use-ratio of surface water has been raised, the groundwater recharge rate from surface water has been reduced, and groundwater has been exploited on a large scale. This has led to the decline of ground-water levels and the degradation of eco-environments in the Heihe watershed. Therefore, the study on the change in groundwater levels in recent years, as well as simulating and predicting groundwater levels in the future, have become very significant for im-proving the ecological environment of the Heihe River Basin, to coordinate the water contradiction among upper, middle and lower reaches of Heihe River Basin and to allocate the water resources. The purpose of this study is to analyze the groundwa-ter-level variations of the Ejina region based on a large scale, to develop and evaluate a conceptual groundwater model in Ejina Basin, to establish the groundwater flow model using the experimental observation data and combining Modular Three-Dimensional Groundwater Flow Model (MODFLOW) and GIS software, to simulate the regional hydrologic regime in re-cent 10 years and compare various water-delivery scenarios from midstream, and to determine which one would be the best plan for maintaining and recovering the groundwater levels and increasing the area of Ejina oasis. Finally this paper discusses the pos-sible vegetation changes of Ejina Basin in the future.