Urban waterlogging degree simulation evaluation method based on Grassshop platform

Abstract

The invention discloses an urban waterlogging degree simulation evaluation method based on a Grassshop platform. The method comprises the steps: 1, carrying out the integration of urban elements, carrying out the Boolean operation of a plurality of curved surfaces, combining the curved surfaces into a single curved surface, and carrying out the mesh generation of the curved surfaces; 2, setting arunoff starting point in the curved surface area, and generating a runoff curve by utilizing slope iteration; 3, extracting a starting point and an ending point of runoff, and projecting the startingpoint and the ending point to an analysis plane; and 4, calculating the ratio of the number of the starting points to the number of the ending points in the analysis area to form quantitative analysisof the waterlogging degree of the area. According to the invention, comprehensive consideration of multiple urban elements is realized, runoff analysis is carried out based on terrains, roads, buildings and water areas, visual display of urban waterlogging-prone areas and quantitative analysis of waterlogging-prone degrees are realized, and finally scientific planning and intelligent constructionof cities are guided.

Description

technical field [0001] The invention belongs to the field of urban stormwater management, and in particular relates to a method for simulating and evaluating urban waterlogging susceptibility based on a Grasshopper platform. Background technique [0002] With global warming and frequent extreme weather, heavy rain has become a high-frequency disaster that causes urban waterlogging and hinders urban development. With the continuous advancement of urbanization, the urban waterlogging phenomenon of "the city looks at the sea" has become more and more serious, causing traffic congestion, damage to public facilities, damage to residents' personal and property safety, and many other problems. The main reason for this is that in the planning stage of urban construction, it is impossible to comprehensively evaluate and consider multiple urban elements such as the city's existing terrain, road conditions, and architectural layout, and it is not possible to analyze and avoid urban flo...

AI Technical Summary

Problems solved by technology

However, these methods cannot truly simulate the current situation of the city, and fail to fully consider multiple urban elements such as buildings, roads, and waters for comprehensive simulation and analysis. The results of simulation evaluation are not accurate, and they cannot provide accurate and scientific guidance for urban planning and construction.

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