母猪河地下水库数值模拟和调蓄分析

Research on the Numerical Simulation and Regulation Analysis of Groundwater Reservoir in Muzhu River

威海市属于资源性严重缺水的地区,随着社会经济的发展,水资源供需矛盾日益加剧,为了缓解这一矛盾,在母猪河下游拟建地下水库,进行河道拦蓄,增加地表水和地下水的利用率。结合母猪河下游的水文地质条件,利用Visual Modflow进行数值模拟,对地下水库进行调蓄分析,确定较为合理的开采方案,得出以下结论:母猪河地下水库建成后,有较大的开发潜力,潜水含水层有较大的可调蓄空间,丰、平、枯和特枯年的最大调蓄水量分别是2392.8、2056.5、1743.3和1012.8万m^3;推荐布置36眼开采井(下级库23眼、上级库13眼),全年以0.015 m^3/s的开采量进行开采作为地下水库水源地开采方案。

Weihai City is an area with severe water resources shortage,and the contradiction between water supply and water demand is increasing with the development of social economy.In order to alleviate this contradiction,an underground reservoir is to be built in the downstream of Muzhu River for intercepting river water and increasing the utilization of surface water and groundwater.According to the hydro-geological condition of the downstream of Muzhu River,paper constructs a hydro-geological conceptual model and a groundwater flow mathematical model through Visual Modflow,analyzes the regulation and storage of underground reservoir and selects a more suitable mining scheme.The paper draws the following conclusions:the underground reservoir of Muzhu River has great potentials for exploitation;the water regulation by storage of wet,normal,dry and special dry years is 23.928,20.565,17.43 and 10.128 million m^3,respectively,and after the construction,Muzhu River has a great potential for development;the extraction scheme of 36 wells(23 wells in lower reservoir area and 13 wells in upper reservoir area)with a flow rate of 0.015 m^3/s for the whole year is a more suitable scheme plan.