Development and application of urban stormwater risk analysis modeling system

Abstract

In order to evaluate the pipeline drainage capacity and urban flood risk objectively, urban storm water risk analysis modeling system (USRAMS) is developed based on EPA SWMM and ArcEngine combined with the principle of equal flow time-line method and water balance. The principle and function of USRAMS and the method of assessing pipeline drainage capacity and urban flood risk with USRAMS are described, and the suitability of USRAMS is verified. Taking Cangzhou as an example, USRAMS is used to assess the pipeline drainage capacity and urban flood risk, and the position of bottleneck pipe and the waterlogging risk distribution are expressed in thematic map accurately and directly. The facts show that USRAMS only needs two parameters, namely the runoff coefficient and the catchment time, and adapts to the current situation in china better; two-dimensional earth surface waterlogging simulation adopts hydrologic budget theory, so its calculation is stable and fast. The results of USRAMS may provide reference for urban waterlogging prevention and control and the planning and reforming of stormwater pipe network system.

Keywords

• urban water supply and drainage engineering
• USRAMS
• isochronous stream line
• runoff coefficient
• drainage capacity assessment
• local flooding risk analysis