Numerical simulation-based city low impact development optimization configuration method

Abstract

The invention discloses a numerical simulation-based city low impact development optimization configuration method. The method comprises the following steps of performing numerical simulation by utilizing a mathematic model to obtain hydrological and water quality data; according to the hydrological and water quality data, establishing a city low impact development optimization evaluation system;determining index scores in the system; in combination with a Delphi method and an analytic hierarchy process, determining index weights in the system; and in combination with the index scores and weights, screening out a city low impact development optimal scheme. Compared with the prior art, the method has the advantages that the defect of insufficiently comprehensive consideration of factors incity low impact development is overcome; environmental, economic and social factors are comprehensively considered; the city low impact development scheme is objectively and quantitatively evaluatedin a qualitative and quantitative index combination mode; the city low impact development scheme with optimal environment-cost-benefit is screened out; and an effective technical management tool is provided for multi-objective management of sponge cities.

Description

technical field [0001] The invention relates to a method for optimal configuration of cities, in particular to a method for optimal configuration of urban low-impact development based on numerical simulation. Background technique [0002] With the acceleration of urbanization, urban land use and vegetation cover have undergone tremendous changes, and the urban impermeable area has increased, destroying the original natural hydrological cycle process, leading to urban waterlogging and non-point source pollution. [0003] In order to solve the problems of water ecology, water safety and water environment, with low-impact development as the core concept, a new concept of stormwater management, sponge city, is proposed. Low-impact development (Low Impact Development) mainly controls the runoff and pollution caused by heavy rain through measures such as bioretention facilities, roof greening, shallow vegetation ditch, and rainwater utilization, so that the development area is as ...

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Problems solved by technology

[0004] At present, urban low-impact development schemes generally only consider the development of water volume control. In the early stage of low-impact development, the environmental, economic and social benefits of low-impact development cannot be fully identified, and the stormwater management scheme cannot be screened by comprehensively combining quantitative and qualitative indicators. , lack of objective, scientific and rational optimization of urban low-impact development measures

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