本项目针对雨水径流污染负荷随降雨强度、时长、晴天间隔、下垫面等因素变化的实际情况，结合城市河流对雨水径流污染的承受能力随河道水文水质变化的特点，以深圳市大沙河流域为例，围绕“动态控制雨水径流污染，实现河流水质达标”这一核心目标，按照“厂-网-河-城”系统化治理思路，基于区域TMDL理论，综合运用现场监测、数值模拟、地理信息系统等技术，评估径流污染控制边界条件，定量分析雨水径流污染产生规律、污水处理系统对雨水径流的处理能力及河道水环境对雨水径流污染的承受能力，在此基础上对雨水径流污染采取精准截流与动态调度的控制方式，最终形成雨水径流污染动态控制系统方法，从而协调解决河道污染控制需求与城市污水处置能力之间的矛盾，为我国城市雨水径流污染控制及水环境提升提供新思路、新技术、新手段。

Pollutant loads washed out of the ground surface in urban runoff varies with multiple factors, such as rain intensity, duration, dry period and ground surface properties. In order to fulfil river water quality standards, dynamic control of runoff pollutants is required according to the variation of rain precipitation, river flow rates and water quality. Taking Dasha River in Shenzhen as the study object and based on the regional TMDL theory, field monitoring, geographic information system and numerical simulation, this project quantifies the buildup-washoff process of runoff pollutants, urban runoff treatment capacity of both water reclamation plants and urban rivers. This project aims to provide the systematic solutions to dynamic and refined pollutant control for urban runoff, solve the contradiction between urban runoff pollutant control needs and treatment capacity of water reclamation plants and contribute to new ideas, new technologies and new means for urban runoff pollutant control and water environment improvement in China.