喀什三角洲地区地下水数值模拟与可持续利用

Numerical Simulation and Sustainable Utilization of Groundwater in Kashi Delta Region

喀什三角洲地区具有内陆干旱气候特征,因研究区西部地层中存在高硫酸盐类矿物质,导致研究区内存在“水质性”缺水、地下水空间分配不均匀等问题。根据水资源可持续利用为目标,采用Visual Modflow对喀什三角洲地区地下水进行数值模拟,评价地下水可采资源量,结果表明:在南部盖孜河补给区现状年开采10万m^(3)/d的基础上,增加研究区西部30万m^(3)/d的开采与研究区东南部18万m^(3)/d的开采模式,既满足本地区未来需水量的中长期规划,也满足生态环境与地下水资源的可持续利用。

The Kashi Delta region is featured by inland arid climate.The existence of high sulfate minerals in the strata in the western part of the study area leads to water quality-induced water shortage and uneven distribution of groundwater in the study area.According to the goal of sustainable utilization of water resources,the groundwater in the Kashi Delta region was numerically simulated by Visual Modflow to evaluate the recoverable resources of groundwater.The simulation result shows that on the basis of 100000 m^(3)/d extraction of water from the infiltration area of Gaizi River in the south of the study area,300000 m^(3)/d extraction of water in the west and 180000 m^(3)/d in the southeast of the study area shall be increased,which not only meets the medium and long-term planning of the future water demand in the region,but also meets the sustainable development of the ecological environment and groundwater resources.