Basin assimilative capacity calculation method based on genetic algorithm

A technology of pollution-holding capacity and genetic algorithm, applied in the direction of genetic rules, calculations, genetic models, etc., can solve problems such as negative pollution-holding capacity, achieve the effects of reducing pollutant concentration, increasing sewage discharge space, and improving water quality in river basins

Pending Publication Date: 2021-11-09
HOHAI UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a method for calculating the pollution-holding capacity of a watershed based on a genetic algorithm. The calculation model of the pollution-holding capacity of the river basin to solve the problems such as the negative value of the pollution-holding capacity

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  • Basin assimilative capacity calculation method based on genetic algorithm
  • Basin assimilative capacity calculation method based on genetic algorithm
  • Basin assimilative capacity calculation method based on genetic algorithm

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Embodiment 1

[0033] Such as figure 1 As shown, the calculation method of the basin pollution-holding capacity based on genetic algorithm of the present invention comprises the following steps:

[0034] Step A, obtain the target water quality C of n water functional areas max，i , the length of the river section L i , Design flow Q of river section i , The amount of sewage and wastewater entering the river in the river section Q p，i , the average velocity u of the river section i , organic pollutant comprehensive attenuation coefficient K i , where, i=1,2,...,n;

[0035] Step B, randomly generate N populations that meet the water quality constraints of each water function zone, and the dimension of a single individual is n, that is, obtain the design water quality C of the control section of each water function zone s,i , Section inflow design water quality C 0,i , i=1,2,...,n, and establish the calculation formula of river pollution-holding capacity based on genetic algorithm.

[00...

Embodiment 2

[0049] Such as figure 2 , image 3 as shown, figure 2 It is the comparison of COD concentration in each water function zone under the different pollution-holding capacity calculation methods of a certain watershed provided in this embodiment; image 3 It is the comparison of ammonia nitrogen concentration in each water function area under different calculation methods of the pollution-holding capacity of a watershed provided in this example; this example takes the research on the pollution-holding capacity of a certain watershed as an example, proposes a calculation model of the watershed’s pollution-holding capacity based on genetic algorithm, and calculates The total pollution-holding capacity of the watershed. The specific implementation steps are as follows:

[0050] A. Obtain the target water quality of 10 water function zones in a river basin C max，i , the length of the river section L i , Design flow Q of river section i , The amount of sewage and wastewater ent...

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Abstract

The invention discloses a basin assimilative capacity calculation method based on a genetic algorithm, which comprises the following steps of: obtaining the target water quality, the river reach length, the river reach design flow, the river reach sewage and wastewater in-river quantity, the river reach average flow velocity and the organic pollutant comprehensive attenuation coefficient of n water functional areas, and establishing a river assimilative capacity calculation formula based on the genetic algorithm; calculating COD (Chemical Oxygen Demand) and ammonia nitrogen assimilative capacity of each water functional area under the traditional drainage basin assimilative capacity calculation method; and comparing the river COD and ammonia nitrogen assimilative capacity calculated based on the genetic algorithm with the river COD and ammonia nitrogen assimilative capacity calculated by the traditional algorithm. According to the method, iteration, population optimization and the like are considered on the basis of an existing drainage basin assimilative capacity calculation method, a drainage basin assimilative capacity calculation model based on the genetic algorithm is provided, the pollutant concentration can be reduced, the drainage basin water quality can be improved, and the method is suitable for a drainage basin with multiple water functional areas.

Description

technical field [0001] The invention relates to a method for calculating the pollution-holding capacity of a river basin based on a genetic algorithm, and belongs to the technical field of water environment management in a river basin. Background technique [0002] The pollution-holding capacity of a river refers to the ability of a river to accept a certain amount of pollutants on the basis of ensuring the use of water resources. The river has self-purification ability, that is, after the river accepts pollution, due to its physical, chemical, and biological characteristics, the pollutants can be migrated, diffused, transformed, and degraded, so that the water quality of the river can be partially or even completely restored. . With the development of urban industrialization and urbanization, urban rivers not only serve as the main source of urban water, but also become natural sewage discharge sites for cities. As the amount of pollutant discharge exceeds the pollution c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/27G06N3/12G06Q50/26G06F111/06
CPCG06F30/27G06N3/126G06Q50/26G06F2111/06Y02A20/152
Inventor 贺蔚蒋爱丽张健俞晓东陈胜
Owner HOHAI UNIV
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