The Design Research Of Catchment System In Northeast Central City Based On Low-impact Development Mode

This paper takes the central city of Shenyang as an example to carry out research on the design of catchment system with Low-impact development mode.Affected by geographical location and natural conditions,Shenyang is a city with water shortage and large water consumption.The urban water supply exceeds its own water supply for many years,resulting in water shortage and deep access to groundwater,resulting in serious groundwater consumption and urban emergence.Sink and funnel area.The annual precipitation in Shenyang is abundant,and the precipitation is kept very little.The water needed by residents in Shenyang is purchased from Dahuofang Reservoir and supplemented with water.This paper mainly combines the Low-impact development model to construct a Low-impact catchment system.According to the requirements of urban development planning,it fully implements the seepage,stagnation,storage,net,use and drainage of rainwater^[1],with the core ideas of collection,storage,use and supplement.To create a sustainable green ecological water circulation system.Design of urban catchment system of Low-impact mode.The Permeable gully water collection facilities collect and store the road precipitation,the ecological tree pool absorbs and absorbs the initial precipitation,the green grass planting ditch absorbs and infiltrates the precipitation;the initial collection and storage of the roof of the park is collected,the bottom of the building is Artificial wetland.Precipitation is used as the daily consumption of water in the park;water treatment is separated and recycled in the construction life;the industrial water is recycled and used in the factory,the cooling water flows into the non-freezing port;the precipitation and water reuse water resources maintain the ecological needs and replenish the groundwater,and some flow into the Hunhe to supplement the amount of water in the Hunhe and increase the water level.The construction of Low-impact development model catchment system,realize precipitation collection,control urban soil erosion,as much as possible avoid flood water damage,reduce the load of urban drainage system and urban water treatment system,reduce water pollution,recharge groundwater,increase the water level of Hunhe,and River navigation is possible.