The stormwater detention and retention system is the most important part of urban stormwater management system,and it is also the critical component of urban drainage and flood control plan.The control of runoff pollution,reduction of total runoff volume and runoff peak flow,mitigation of flood disasters and utilization of rainwater resource can be effectively achieved by reasonable design and application of the detention and retention facilities.To solve the major issues in research,plan,design and project implementation of urban stormwater detention and retention systems in China,the different types,functions and characteristics of the detention and retention facilities were clarified,the concepts and framework of the detention and retention system were furthermore presented,and the relations between the detention and retention system and other subsystems of the stormwater management system were analyzed.These can provide more scientific ideas and technical methods for the planning and design,construction and standard establishment of urban stormwater detention and retention system in China.
detention and retention facilitydetention and retention systemurban stormwater management