Research On The Theory And Application Of LID In Sponge City Construction And Simulation Calculation Of Water Quantity In Infiltration Ponds

The rainstorm is one of the main disasters in the city which keeps trialing the city’s drainage system with the rapid development of urbanization and the hard surface of the road surge.In recent years,our country has made great efforts to promote the construction of sponge city.The purpose is to store and use rainfall above 70%.Construction of sustainable development path of rain-flood utilization.This paper mainly introduces the importance of Low Impact Development(LID)in the construction of sponge city,and some technological means of LID.Which methods include rainwater storage facilities,bio-retention facilities,green roofs,grassed wales,permeable pavement,and so on.Meanwhile,carry out a large quantity of water simulation about one park in Beijing.The data simulation process mainly use the Storm Water Management Model(SWMM)that be introduced briefly soon.Sponge is a soft natural or artificial substance full of small holes,which can suck up liquid.The sponge city requires the city to be like a sponge,which has the ability to absorb,filter and store rainwater during the rainstorm.During drought and water scarcity,he can release stored rainwater.The idea behind Low Impact Development(LID)is to treat and manage stormwater prior to direct discharge into receiving water bodies.LID describe a land planning and engineering design approach to manage stormwater.It emphasizes protect water quality use natural features.This method achieves small-scale hydrological control by infiltration,filtration,storage,evaporation and near source runoff storage.In the process of case analysis,SWMM was used for simulation analysis,so as to more effectively analyze the design rationality of rainwater piping system and osmosis pool,the ability to cope with the waterlogging and the total amount of rainwater.EPA’s SWMM is used for planning,analysis,and design related to stormwater runoff.In this study,because the main body of research is the park,and no large polluting enterprises around,so there is no in-depth study was carried out on the water quality,only the model was used to simulate the rainfall formed after the rain runoff water condition.Through the analysis of the parameters of hydrological parameters,pipeline drainage,sewer and mud and other parameters,it is obtained by the heavy rain.Analysis,under the storm rain,the infiltration Ponds simulation conclusion,and pipe that drains out of the water simulation conclusion.According to the synchronous simulation results,this paper gives a prediction of water drainage system,and provides data support for future similar cases.This final data,a strong confirmation,the low impact development is the realization of the society flood,the environment,the economy,the unification of the most optimized means.The LID module in SWMM can effectively quantify the specific project plan,which is the more effective digital model in the construction of sponge cityAt the present stage,the cities of the whole country actively promote the construction of sponge cities,and the low impact development measures have very important reference and guiding significance.