Study On The Visual Description Of Sponge Measures In Urban Residential Areas And Rainfall Flood Process Simulation

The construction of sponge cities can change the type of underlying surface and hydrologic process of cities again.Different sponge measures have different functions,with distinctive influences on the "infiltration,stagnation,storage,clearance,utilization and drainage"process of rainfall.To conduct a simulation on the change of water quality and quantity due to the influence and process of sponge cities on the urban rainfall process,the simulation shall start from the small scale and residential communities;refine and resolve the effects of concrete sponge measures;and launch the mini system integration and process adjustment and control simulation,to ensure the sponge cities to serve the construction of modern cities effectively.At present,simulations on water quality and quantity of sponge cities are usually conducted based on hydro-hydraulic simulation tools in overseas urban areas as a whole,without in-depth joint simulation on the role and process links of sponge measures or open or controllable connections,making it difficult to launch in-depth and subtle dynamic process studies.This paper applies modern information technologies to conduct the visual simulation on the effect of sponge measures and rainfall process,based on the sponge measures(sponge communities)applied in residential communities.It explores the feasibility of quantitative simulation from the perspectives of water quantity and quality,to further provide new pathways for the control and adjustment of different sponge measures on rainfall runoff and pollutants.The research results of this paper are as follows:(1)Visual description of sponge measures and the change process of rainfall water quality and quantity of sponge communities.During the construction of sponge cities,this paper,based on analyzing and summarizing the hydrologic process of sponge cities,utilizes synthetic integration platform and knowledge graph tool described by visual logical relation to conduct the visual description on the infiltration,stagnation,storage,clearance,utilization and drainage links,LID and various measures,surface runoff organization process,pipe-network flow concentration process,and water quantity and quality process of runoff area.(2)Componentization of water quantity and quality simulation of sponge communities.This paper develops the business components of analysis,computation and modulation method for surface confluence,drainage process,water quality and quantity adjustment and control in sponge communities;launches the packaged assembly of the components according to the business process;constructs a component library for the simulation of water quality and quantity,to lay a good foundation for the reuse and composite construction of components.(3)The construction of business process simulation system based on synthetic integration platform.On the basis of the visual measures and process description,this paper analyzes and prepares the visual logical relation graph with clear business relation and affiliation relation of sponge communities and the nesting of business relation graphs,to realize the hierarchical and classified visual business construction for the water quality and quantity of sponge communities.Under the visual platform framework,this paper selects and adds different components to various nodes in the graph in need of computation and constructs the business system for simulation,for the convenience of launching the business service for the rainfall process and water quality and quantity control and adjustment of sponge communities.(4)Analysis on the simulation of multi-scenario water quality and quantity control and adjustment based on process simulation system.Taking a sponge community in Beijing as an instance,this paper studies the visualization of sponge measures and simulation platform construction of research object.Based on the simulation system,this paper analyzes and simulates the business in multiple scenarios,including concrete sponge links,pipe-network flow concentration,water quality and quantity control and adjustment;in particular,this paper discusses the simulation process analysis on the simulation system's responses to dynamic situations,including change of simulation conditions,change of simulation processes and change of research obj ects,trying to test its feasibility in practical application.