北京城市副中心海绵城市建设对地下水环境影响评价

以城市副中心北运河西岸湿地（甘棠大桥段）作为典型面状海绵体，利用2018年5月—9月采集的300组地表水和地下水监测数据，分析典型海绵体地下水水化学特征及形成机制，探讨不同含水层之间水力联系，并以Cl-为指示因子，结合其他水化学指标研究分析典型面状海绵体建设背景下地下水与地表水之间的交互作用及影响程度。结果显示，在垂向上，10 m、20 m含水层地下水之间联系密切，且受大气降水影响明显；在平面上，地表水对10 m、20 m含水层组地下水的影响距离为90 m～120 m，地表水对30 m含水层组地下水的影响距离为80 m～90 m。

Environmental Impact Assessment of Sponge City Construction on Groundwater in Beijing Municipal Administrative Center

Taking the wetland on the west bank of North Canal(Gantang bridge section) in Beijing Municipal Administrative Center as a typical planar sponge body, using 300 groups of surface water and groundwater monitoring data collected from May to September 2018, this paper analyzed the hydrochemical characteristics and formation mechanism of groundwater in the typical sponge body, discussed the hydraulic connection between different aquifers. Taking Cl- as the indicator factor and combining with other hydrochemical indexes, it studied the interaction and influence degree between groundwater and surface water under the construction of typical planar sponge body. The results showed that in the vertical direction, groundwater was closely connected between 10 m and 20 m aquifers, and was obviously affected by atmospheric precipitation. In the plane, the influence distance of surface water on groundwater of 10 m and 20 m aquifer groups was between 90 m and 120 m, and the influence distance of surface water on groundwater of 30 m aquifer group was between 80 m and 90 m.