Numerical simulation-based city low impact development optimization configuration method

A low-impact development and numerical simulation technology, applied in data processing applications, general water supply conservation, instruments, etc., can solve the problem of lack of optimal allocation of urban low-impact development measures

Inactive Publication Date: 2018-02-09
HOHAI UNIV
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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 can...

Method used

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  • Numerical simulation-based city low impact development optimization configuration method
  • Numerical simulation-based city low impact development optimization configuration method
  • Numerical simulation-based city low impact development optimization configuration method

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Embodiment 1

[0323] Taking an urban community as an example to optimize the configuration of low-impact development, the steps are as follows:

[0324] 1. Numerical simulation to obtain hydrological and water quality data

[0325] The hydrological and water quality data comes from the SWMM (Storm Water Management Model) model simulation calculation. After calibration and verification, the correlation coefficient between the model simulated runoff and the measured runoff is r xy = 0.74, relative error RE = 0.28, Nash-Sutcliffe efficiency coefficient NSE = 0.87; model for SS (suspended solids), COD (chemical oxygen demand), TN (total nitrogen) and TP (total phosphorus) four pollutants Simulation, correlation coefficient mean|r xy |>0.70, the relative error RE0.70, it is considered that the simulation results of the SWMM model are reliable.

[0326] The hydrological and water quality data before and after low-impact development are shown in Table 1.

[0327] Table 1 Hydrological and water ...

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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 ...

Claims

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Application Information

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IPC IPC(8): G06Q10/04G06Q50/26
CPCG06Q10/04G06Q50/26Y02A20/152
Inventor 赖秋英李一平黄冬菁
Owner HOHAI UNIV
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