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结合北京西部水系现状,联通相关河道、渠系及砂石坑,开展城市雨洪利用,联合调蓄雨洪水、外调水及地表水,构建了团城湖调节池周边、南旱河沿线及永定河引水渠等三处西部水系联通工程,并运用FEFLOW模型模拟调蓄回灌工程对当地地下水位时间和空间变化情况进行了分析。通过实施西部水系调蓄规划,恢复沟通北京西部水系,可增加地表调蓄能力791万m3。地下水回灌最大影响区域面积达到251.2 km2,年回灌量可达1.7亿m3。对于开展雨洪利用、水系联通设计及工程实施有着科学的借鉴意义。
Combined with the status quo of water systems in western Beijing, Unicom related river channels, canal systems and gravel pits, the project carried out urban rain flood use, combined with rainwater storage, external regulation of water diversion and surface water, constructed surrounding Tuancheng Lake regulation pool, Yongding River diversion canal three Western China Unicom project, and the use of FEFLOW model to simulate the storage and recharge project of the local groundwater level in time and space changes were analyzed. Through the implementation of western water system regulation and restoration plan and the resumption of communication with western Beijing water system, an increase of 7.91 million m3 of surface regulation and storage capacity will be achieved. The maximum impact area of groundwater recharge reaches 251.2 km2 and the annual recharge volume will reach 170 million m3. It has a scientific reference for carrying out rainwater flood utilization, water system design and project implementation.