Studies On Sponge Campus Planning Based On Swmm Model

In recent years,urbanization has led to the rapid expansion of land use,the urban area has been hardened a lot,the surface area of impervious water has gradually increased,and the ability of ground interception has been greatly reduced.In the event of heavy rain,most cities will inevitably have serious intellal locust problems.In this context,China has vigorously promoted the construction of sponge cities.Based on the theoiy of sponge city construction,the paper explores the necessity of building a sponge campus in semi-arid areas,There are certain advantages in implementing the concept of sponge city construction on campus,which plays an important role in relieving campus waterlogging,and uses low LID measures to control the use of campus rainwater.Through the field investigation method,Arc GIS spatial analysis method,Swmm model simulation analysis methods.Using the East Campus of Inner Mongolia Agricultural University as a practical case.The goal of sponge campus construction,concept,principle,the LID scheme practical feasibility are put forward,and use swmm model to simulate the scheme.The results showed that the study area was not included LID measures which annual total mnoff control rate was 45.70%.By arranging LID measures,the result was 89.80%,the rainwater was controlled within the study area.From the perspective of maintaining a virtlous cycle of water environment in the study area and economic rationality,the modified design was adjusted in a targeted manner.Through the comparative analysis of LID measures,the basic design scheme is optimized.In the case of reducing the setting of the green roof,the swmm simulation result is 85.50%,reaching the standard of the sponge city in Hohhot,which farther proves that combine LID measures with landscape planning has feasibility and scientificity and provides new planning ideas for campus development.