摘要
近年来,沙颍河流域内大量开采深层地下水,形成了大面积降落漏斗。因此,亟需加强流域地表水与地下水的统一管理。使用GSFLOW构建了沙颍河流域的地表水与地下水联合模型,将流域划分为178个水文响应单元（HRU）并与MODFLOW网格叠加生成10 915个地下水库。利用1961—1965年的观测数据对模型进行拟合验证,取得了较好的模拟精度。并在此基础上分析了流域内地下水与河流的补排关系以及流域内多年的水均衡。结果表明：流域以地下水补给河流为主,补给量随降雨量变化,占地表径流总量的20%~90%。流域水资源主要以蒸散发和地表径流的方式排泄,地表径流量多年平均的40%~50%为基流。本研究可为沙颍河流域地表与地下水资源综合管理提供重要支撑。
The Shaying river basin is located on the middle and upper reaches of Huaihe River Plain Region with a large part of land and a large population, where water shortage is very serious. In recent years, a large amount of exploitation of groundwater in deep aquifers has lead to the massive cones of depression of groundwater levls in many places of the basin and the unified management of surface water and groundwater is needed to strengthen as soon as possible. This article built a coupled GSFLOW model for the Shaying River Basin. The study area is divided into 178 hydrologic response units （HRU） and 10 915 groundwater reservoirs, which was generated by intersecting HRU and MODFLOW cells based on the GIS platform. The modeling results show a good agreement with the measurements of surface water and groundwater levels during 1961 to 1965. The relationship of drainage between groundwater and rivers and the water balance are also analyzed in the basin. The results show that groundwater discharge rivers mainly to rirers and the recharge accountes for 20% ~ 90% of the total surface runoff depending on different precipitation. Water is discharged in the form of evaporation and surface runoff, 40% - 50% of which comes from groundwater base flow. This study can be an important tool for management of surface water and groundwater in Shaying river basin.
出处
《水文地质工程地质》
CAS
CSCD
北大核心
2015年第2期1-9,共9页
Hydrogeology & Engineering Geology
基金
国家自然科学基金重点项目(40972153)
贾鲁河流域水质改善综合控制研究与示范(2012ZX07210-001)
