低影响开发能够缓解降雨径流引起的内涝、污染等问题，改善水环境质量，但是，这种效能需要通过排水管网传递才能实现。LID与排水管网对受纳水体的影响存在显著的协同效应。然而，现阶段的规划设计将LID与排水管网相割裂，这样不能高效地控制径流对受纳水体的影响。鉴于此，本研究以“如何协同设计LID与排水管网，使城市降雨径流对受纳水体的影响最小”为核心目标，在对典型排水片区开展LID设施与排水管网水量水质演变过程同步监测的基础上，建立能够模拟“地表径流产生-LID设施处理-排水管网输送”全过程的LID设施与排水管网协同效应模拟模型，通过大规模数学实验识别协同效应对受纳水体影响的规律；利用多目标优化技术开发基于协同效应的LID设施与排水管网优化设计模型，并开展案例应用，为案例区域提出系统优化设计的建议。本研究可以为LID与排水管网的设计提供新的理念与工具，为我国“海绵城市”的建设提供技术上的支撑与保障。

Low impact development can mitigate urban flooding and water pollution and improve the quality of water environment. But the efficiency can only be realized with the participation of drainage systems. LID measures and drainage systems have significant synergy effect on receiving water. However, LID measures and drainage systems are planned and designed separately, which can not effectively reduce the impact from runoff to the receiving water. Therefore, the research focuses on how to design LID measures and drainage systems simultaneously to minimize the impact from runoff to the receiving water. Based on the monitoring of quantity and quality of both LID measures and drainage systems, a model for the synergy effect of LID measures and drainage systems which can simulate the whole process of runoff generation, LID disposing and drainage transporting is to be built. A mass of mathematical experiments are to be carried out intending to identify the influence from the synergy effect of LID measures and drainage systems on receiving water. An optimization model of the synergy effect of LID measures and drainage systems is to be built using multi-objective optimization and a case study is to be carried out based on the optimization model. Systematic optimization suggestions will be given to the case study area according to the calculation result. The results of the research can supply new methods for the designing and planning of LID measures and drainage systems and support the generalization of the Sponge City.