Simulation Of Urban Hydrological And Water Quality Process And LID Measures Based On SWMM Sponge

Nowadays,gray pavement design abounds everywhere;tall buildings and mansions serve as the crucial symbol of the degree of city development.In terms of designing and masterminding,due to the costly “Gray” installation bring the significant influence on original natural cycle system,we only can depend on artificial design idea to remold and come true eco-cycle.With rapid development of material conditions and technology,meanwhile,“Gray” installation impacting subtly on hydrologic cycle with unpredictable degree.Impermeable ground increasing continually make volume of rainwater infiltration greatly reduced so that the city drainage system has a vastly trials.The urban area with outmoded network of drains was overwhelmed.Not only can scanty rainwater resource not been efficiently used,but it also could be the dangerous resource which causes flooding.According to “Code for design of outdoor wastewater engineering”(GB50014-2006)(2016 Edition),so many urban areas cannot up to the normative requirements.In this study,firstly,starting with the notion of sponge city to explore relative experiences and shortcomings of the city rainfall-flood study.Based on study deeply of Storm Water Management Model software,SWMM,learning the hydraulic model of stimulation principle and construction method.That include graphic defragmentation of study area,runoff generation,confluence,percolation model choice,determination of rainfall model parameters and so forth.Secondly,linking up low impact development,LID,notion with the most popular exploitation measure,it is main introduce LID tech-features,usable range,and merit and demerit of permeable pavement,green roofs,rain garden,grass planting levee and so forth.Relying on the basic data of the Experimental area in Hunnan new district of Shenyang city to formulate modification project.Referring to the rainstorm intensity formula of Shenyang City,the SWMM model is used to simulate the surface runoff and pipe network load during the rainfall period of 0.5a,1a,3a,5a and 10 a,and then were added LID technical measures that best fit the study area compare with conventional model;the next step is to simulate the 0.1a and 0.25 a reappear rainfall runoff water quality by using EMC rinsing.Through theoretical data analysis,it provides a meager contribution for the realization of sponge cities.