A Method for Evaluating Water Quality

Abstract

The invention provides a method for evaluating water body quality, which includes selecting participating indexes, and obtaining historical monitoring values ​​of each participating index to construct a sample matrix; selecting quality standards and standard values, and obtaining each participating index according to the historical monitoring values The single-factor pollution index of each participating index is used to construct the pollution index matrix; the projected index function is constructed and optimized by the accelerated genetic algorithm to obtain the weight value of each participating index; the single-factor pollution index of each participating index is tested for distribution, and each participating index is obtained The type of probability distribution; build a comprehensive pollution index function, use Monte Carlo sampling simulation to obtain multiple comprehensive pollution index values; build a cumulative frequency distribution map, and compare the water quality with the highest probability as the evaluation result. The implementation of the present invention can objectively and rationally evaluate the water body quality in view of the deficiency that the existing comprehensive pollution index water quality evaluation method does not consider the weight of participating indexes and the uncertainty of evaluation results.

Description

technical field [0001] The invention relates to the field of environmental science and technology, in particular to a method for evaluating water body quality. Background technique [0002] With the increasing degree of agricultural intensification, the gradual acceleration of urbanization and the rapid development of modern industry, a large amount of untreated industrial, agricultural and domestic sewage enters the water body, leading to the deterioration of water quality and seriously threatening the ecology of the watershed. Health and water supply. According to the "2017 Bulletin on the State of the Ecological Environment in China", 32.1% of the national surface water quality monitoring sections (1,940) are at or worse than Grade IV water quality standards; 66.6% of the groundwater monitoring points (5,100) are at poor or worse Extremely poor. Under the current situation of such serious water pollution problems, it is urgent to effectively carry out comprehensive impr...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the embodiments of the present invention is to provide a method for evaluating water body quality, which can objectively and reasonably evaluate the water body quality in view of the existing comprehensive pollution index water quality evaluation method that does not consider the weight of participating indexes and the uncertainty of evaluation results. Evaluate and be able to give the possibility of all results under the uncertain conditions of participating indicators

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