Study On Runoff Control Index Decomposition In Shenyang Sponge City Demonstration Area

Since the 2013 central urbanization conference was held,more and more cities in China have carried out the pilot exploration of sponge city construction.However,due to the immature construction system of sponge City,landing of regional low impact development control goals is still very difficult.The total annual runoff control rate is the primary target in the control of sponge city planning,target value of total control of runoff and decomposition is sponge city in the planning and design of the key and difficult point.Through the research of city underlying surface runoff characteristics,summarize the rules of runoff,the runoff can be controlled by the target city land use classification for different standard.According to the demand analysis based on four aspects of water ecology,water security,water environment and water resources to determine the total amount of runoff control target sponge City,with the characteristics of city underlying surface runoff as the starting point,according to city land use classification to carry out research on multi level decomposition of the target value,to explore the city regional low impact development runoff control target design and its decomposition mechanismTaking Shenyang city as the research area of sponge demonstration area,according to the surface condition of the various types of sponge city demonstration area,statistics and analysis of all kinds of land use of the typical underlying surface configuration,and calculate all kinds of land use in a variety of different proportion of facilities under the size of sponge control ability,suitable range the selection for the class of the annual runoff control rate value of the recommended value.According to the sponge city demonstration area Shenyang city natural runoff control rate and current situation of the underlying surface condition,the Shenyang City sponge demonstration area of total annual runoff control rate value,the catchment area of control unit-land classification-construction project multi control,stepwise decomposition and comprehensive verification,further construction projects is low the influence of specific index development requirements,provides a feasible scheme for the sponge City runoff control index of Shenyang city in the fall,can also provide reference for other city...