Impervious earth surface space layout rapid optimization method for urban rainstorm waterlogging prevention and control

Abstract

The invention discloses an impervious earth surface spatial layout rapid optimization method for urban rainstorm waterlogging prevention and control. The method comprises the steps that S1, a conceptmapping relation between an impervious earth surface spatial layout optimization problem and a multivariate linear programming problem for rainstorm waterlogging prevention and control is established;s2, constructing a linear objective function, and converting the objective function with the minimized runoff coefficient into a most direct linear programming objective function through a linear relationship; s3, setting a linear constraint condition; and S4, calculating an optimization result, sequentially setting constraint conditions corresponding to the runoff cells, carrying out loop iteration to carry out linear programming solution, and substituting the solved optimal impermeable surface into the SCS-CN model to carry out result evaluation. According to the method, the total impervious surface area constraint is added into the multivariate linear programming constraint condition, strict limitation of the total impervious surface area is achieved, the consistency of urban impervious representative areas before and after space optimization is guaranteed, and the influence of the impervious surface on rainstorm waterlogging is reduced from the perspective of space layout optimization.

Description

technical field [0001] The invention relates to the technical field of geographic information systems and the field of urban space planning, in particular to a method for quickly optimizing the spatial layout of impermeable surface surfaces for urban rainstorm and waterlogging prevention and control. Background technique [0002] With the rapid development of urbanization, rainstorm and waterlogging have become a typical "urban disease" in my country, seriously hindering the sustainable development of cities. Among them, urban impermeable surface, as the main symbol of urban development, has been proved to have an important impact on urban rainstorm waterlogging from two perspectives of area and spatial layout. The rapid expansion of urban impervious surfaces reduces the efficiency of rainwater infiltration, leading to a reduction in the runoff time of urban surfaces, an increase in surface runoff, and frequent occurrence of urban rainstorm and waterlogging disasters. There...

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Problems solved by technology

From the perspective of spatial layout, the research group aims to minimize the runoff coefficient calculated by the SCS-CN model, uses the ant colony algorithm as a cyclic iterative optimization training model, and builds a loosely coupled model with the help of connection elements on the impervious surface. The principle of spatial exchange of surface types preliminarily realizes the spatial layout optimization of impervious surfaces in a small area, but this method still has the shortcomings of long optimization time and high intensity of spatial transformation, which makes it difficult for the model to comprehensively optimize considering other waterlogging factors

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