乌鲁木齐河流域柴窝堡盆地与河谷区地下水流模拟  

Modelling of regional groundwater flow of the Chaiwopu Basin and the river valley in the Urumqi River catchment

作　　者：李宁[1] 周仰效 李文鹏[1] 

机构地区：[1]中国地质环境监测院,北京100081 [2]联合国教科文组织荷兰水资源学院,荷兰德尔福特

出　　处：《水文地质工程地质》2009年第3期1-7,共7页Hydrogeology & Engineering Geology

基　　金：中荷合作项目“中国地下水信息中心能力建设”

摘　　要：乌鲁木齐河流域柴窝堡盆地与河谷区是乌鲁木齐市的重要供水水源地。为了更好地为地下水资源的可持续开发提供依据,本文尝试将几何形状及含水层厚度差异悬殊的柴窝堡盆地与河谷区联合起来,运用GMS模型系统建立了区域地下水稳定流和非稳定流数值模型。通过对观测孔地下水位过程线和地下水流场进行拟合,校正了研究区的渗透系数、给水度和储水率等水文地质参数。并运用模型分析了研究区的地下水流系统、地下水均衡量、地下水位变化趋势及地下水位监测网的设计。结果表明研究区地下水流主要存在两个径流排泄区:沿乌鲁木齐主河道的径流排泄区和以柴窝堡湖和大小盐湖为排泄中心的径流区;地下水储存量相对较大,能够调节季节性变化与地下水开采的影响;应加强主要河流洪积扇补给区和山前侧向补给带地下水位的监测与排泄区泉水流量的观测。Groundwater in the Chaiwopu Basin and the fiver valley provides important sources of water supply for the city of Urumqi. For the purpose of formulation of sustainable groundwater development plan, a regional groundwater flow model was constructed for the area. Hydrogeological parameters were calibrated against observed groundwater level hydrograph and flow field. The model was used to analyze the flow system, groundwater balance, changes in groundwater levels and direction of groundwater monitoring. The results of this study show that there are two dominant regional flow systems in the area： one is along the main course of the Urumqi River; another is the capture zone of the Chaiwopu Lake and the Salt Lakes. Large groundwater storage could adjust seasonal variations in groundwater recharge and impacts of groundwater abstraction, resulting in stable groundwater level variations and a gradual decline. Current groundwater level observation wells are located in discharge areas and fiver valley. It is very important to have also observation wells in recharge areas along the main fiver alluvial fans and mountain front zones. Observation of spring discharge will provide valuable information for better calibration of the groundwater flow model.

关 键 词：柴窝堡盆地 河谷区 地下水 数值模拟 模型应用 

分 类 号：P641.2[天文地球—地质矿产勘探]