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以某老校区示范区低影响开发(LID)为例,采用PCSWMM模型,介绍其LID建模原理和方法,对老校区构建现状条件下模型和LID模式下模型,探讨LID规划目标指定方法,LID控制设施布局总体思路及优化思路和方法,最终得到老校区LID设施布局方案,并对比最终方案和现状方案,校核达标情况。模拟结果表明,通过在老校区综合应用一定规模的LID设施(雨水桶、生物滞留池、透水铺装),可使老校区开发建设后的年径流总量和径流峰值不大于现状值。
Taking LID in an old campus demonstration area as an example, this paper introduces the principle and method of LID modeling using PCSWMM model, constructs the model under current conditions and LID mode in old campus, and discusses LID planning target designation method, LID Control the overall layout of facilities and ideas to optimize ideas and methods, and ultimately get the layout of the old campus LID facilities program, and compare the final program and the status quo programs to check compliance. The simulation results show that the total amount of annual runoff and runoff peak value after the development and construction of the old campus can be made no larger than the current value by comprehensively applying a certain scale of LID facilities (rainwater tank, biological retention pool and water permeable pavement) in the old campus.