Urban inland inundation intelligent modeling and analysis method based on GIS and SWMM

Abstract

The invention relates to an urban inland inundation intelligent modeling and analysis method based on a GIS and an SWMM. The method comprises the following steps: constructing a simulation system based on the GIS and the SWMM; carrying out automatic preprocessing on the model data and automatically identifying topology errors; calculating a hydrological-hydrodynamic coupling model based on the SWMM by combining rainfall, calculating the amount of rainwater converged into a drainage pipe network system, simulating to obtain actual condition information in the drainage pipe network, and obtaining pipe point overflow data; performing surface water inundation analysis according to the pipe point overflow data, simulating the surface water to obtain the depth of the surface water, and distributing the surface water flow based on a window method; performing early warning analysis on waterlogging of surface water, comprehensively considering prediction of the surface water, automatically dividing waterlogging risk levels of different areas according to a calculation result of a hydrological-hydrodynamic coupling model and a result of surface water inundation analysis, and providing an early warning scheme for drainage waterlogging prevention emergency. The method has the advantages of being low in construction cost, high in model construction automation degree and accurate in analysisresult.

Description

technical field [0001] The invention relates to a method for quickly and intelligently building and simulating an urban waterlogging model based on GIS (Geographic Information System, geographic information system) and SWMM (Storm Water Management Model, storm water management model). Background technique [0002] The focus of urban waterlogging simulation analysis is to be able to accurately calculate and analyze the hydraulic characteristics of the urban underground drainage network system and the occurrence range of waterlogging under specific rainfall conditions. At present, there are usually three kinds of hydraulic analysis and calculation methods for urban pipelines: traditional stormwater pipeline flow calculation formulas, sensor monitoring technology and hydrodynamic model technology. Among them, the calculation formula of pipeline flow is mainly suitable for drainage planning and design, and the calculation accuracy is low; the accuracy of sensor monitoring techno...

AI Technical Summary

Problems solved by technology

[0005] 1. The calculation accuracy of some system technical methods is low, and the calculation results are difficult to meet the needs of urban waterlogging prevention and early warning and drainage system engineering transformation

[0006] 2. Some system technical methods are expensive and have relatively limited application

[0007] 3. The management methods of model data formats are diversified, it is difficult to share with commonly used data formats, and it is easy to form information islands

[0008] 4. Without combining drainage pipeline supervision and hydrodynamic model construction technical process, a set of application systems covering unified management of model data, automatic model construction, intelligent model error correction and other functions are designed, and the difficulty of model construction is high

[0009] 5. The fineness of the surface waterlogging model is not high, and it cannot reflect the impact of actual terrain factors on waterlogging

[0010] 6. The interaction between the surface water system and the drainage pipe network is not combined, and the influence of river jacking on the drainage capacity of the pipe network and the surface water accumulation is ignored

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