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北京市大兴区供水主要以地下水为主,而其中奥陶系岩溶裂隙水占较大比重。通过对奥陶系岩溶裂隙水的补给、径流和排泄以及水化学特征等水文地质条件的综合分析,得出该含水层的主要补给来源为第四系水的垂向越流入渗,进而建立第四系、岩溶裂隙含水层联合的地下水数值模型,划定水源地保护区,并分别制定水源地区和非水源地区的保护措施,为大兴区奥陶系岩溶裂隙水的保护提供科学依据。
The water supply of Daxing District in Beijing mainly consists of groundwater, of which the Ordovician karst fissure water accounts for a large proportion. Through the comprehensive analysis of the hydrogeological conditions of the Ordovician karst fissure water recharge, runoff and drainage, as well as the hydrochemical characteristics, it is concluded that the main recharge source of the aquifer is the vertical inflow of the Quaternary water, Four series and karst fissure aquifers, delimiting protected areas of water sources, and developing protective measures in water source areas and non-water source areas, respectively, to provide a scientific basis for the protection of Ordovician karst fissure water in Daxing District.