A Method of Determining the Diameter and Slope of Urban Rainwater Pipe Network Based on SWMM Hydraulic Model

Abstract

The invention discloses a method for determining urban rainwater pipe network pipe diameter and gradient based on a SWMM hydraulic model. The method is based on a SWMM V5.1 calculation core, and the hydrological and hydraulic calculation process is completely replaced by SWMM simulation, greater circulation with set cycle times and two internal circulation processes according to pipe diameter and gradient adjustment are adopted, the pipe network pipe diameter and gradient are automatically optimized repeatedly, not only can the working efficiency of rainwater pipe network design be improved, but also problems that an existing rainwater pipe design algorithm is static and calculation result accuracy is low can be solved. The method is based on a SWMM hydraulic calculation module, downstream hydraulic boundary conditions corresponding to dynamic rainfall events are fused, the method is completely dynamic in rainwater system design of treatment of complex hydraulic conditions such as pressure flow, pump stations and gates, and actual operation states of an urban rainwater pipe network can be reflected accurately.

Description

technical field [0001] The invention relates to a method for determining the pipe diameter and slope of an urban rainwater pipe network based on a SWMM hydraulic model, and belongs to the intersection field of municipal engineering information technology and geographic information system technology. Background technique [0002] The SWMM model is a storm runoff model launched by the US Environmental Protection Agency, which can completely simulate the urban rainfall runoff process and pollutant transfer process. It is currently widely used in storm runoff simulation and urban drainage system management. It can simulate and analyze the drainage capacity of the existing pipe network, determine the "bottleneck" section of the pipe network with insufficient drainage capacity, and at the same time measure the actual effect of the design and renovation plan in advance according to the simulation results, and obtain a reasonable and economical solution by analyzing and comparing eco...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a method for determining the pipe diameter and slope of the urban rainwater pipe network based on the SWMM hydraulic model. It can take into account the downstream hydraulic boundary conditions and complex hydraulic conditions such as pressure flow and pumping stations. The pipe network performs automatic cycle calculation to adjust the pipe diameter and slope, finally determines the rainwater pipe network design plan, and overcomes the problems of static calculation processing and low accuracy of calculation results in the existing rainwater pipe design

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