Research On The Construction Of Service-oriented Web-SWMM System

In China,with the acceleration of urbanization and the continuous expansion of cities,the problem of urban flooding is becoming increasingly prominent.More and more experts and scholars began to pay attention to this phenomenon,and established corresponding models to solve this problem.Storm Water Management Model(EPA SWMM5,hereinafter referred to as "SWMM model")is a dynamic rainfall-runoff simulation model developed by the US Environmental Protection Agency(EPA),which can better simulate urban flooding and drainage phenomena,widely favored by researchers.However,the use flow of the SWMM model is relatively cumbersome.In addition,it has insufficient support for real-time data and operating platform limitations,which hinders the further promotion and application of the SWMM model.In the context of the rapid development of the Internet and the Internet of Things,combined with the current needs of urban rain and flood simulation,the current SWMM model is difficult to share and reuse.This paper analyzes the use flow of the SWMM model in the network environment,publishes the functions of each stage of the use flow as web services,and studies the service-oriented Web-SWMM system.The research content and results of this article are as follows:(1)For the networked use of the SWMM model,this paper analyzes and summarizes the flow that are suitable for use in the network environment.The use flow is summarized into the stages of raw data preparation,data preprocessing,model operation,and visual analysis of simulation results.The analysis of the flow of using the SWMM model in the network environment has laid the foundation for the publishment of service of the flow.(2)According to the use flow of the SWMM model in the network environment,the existing data resources and function implementation methods involved in each stage of the flow are organized.Based on the service-oriented geographic model sharing method proposed by the Open Geographic Modeling and Simulation(Open GMS)research group,the function implementation methods involved in each stage are standardized wrappered,deployed and published as services.(3)Based on the service-oriented use of the SWMM model,the Web service page of the model is further constructed,and the service-oriented Web-SWMMsystem is implemented.In order to help users invoke the various processing flows of the SWMM model online,carry out model calculations online,and perform visual analysis of the output results online,a series of online tools have been customized.The Web-SWMM system not only avoids the difficulties caused by the localized use of the SWMM model,but also has important significance for the sharing and application of SWMM.(4)Based on the constructed Web-SWMM system,Liandu District of Lishui City,Zhejiang Province,where floods and waterlogging disasters occur frequently,is selected as a research case to carry out online rain and flood simulation to verify the availability of the system.In this study,with the help of Open GMS’s service-oriented model-encapsulation strategy,the use flow of SWMM model in the network environment is published as services.In this way,the complexity and heterogeneity of the various data resources and function implementation methods in the process are shielded,and the cumbersome use flow SWMM model becomes services that can be easily used and controlled in a network environment.On this basis,a service-oriented Web-SWMM system is built.By accessing networked resources,it provides solutions for supporting users to quickly use the Web-SWMM system for urban rain and flood simulation in a network environment,which is conducive to the further promotion and application of the SWMM model.