River and lake main pollution section identification method considering water quality change trend

Abstract

The invention discloses a river and lake main pollution section identification method considering a water quality change trend. The method comprises the following steps: counting annual average concentration values of long sequences of pollutant indexes of different sections of rivers and lakes and an average concentration value for many years; calculating the annual comprehensive pollution indexvalue of each section by adopting a water quality comprehensive pollution index method; calculating the rank correlation coefficient of the comprehensive pollution index of each section by adopting atrend test method; taking the rank correlation coefficient as one of evaluation indexes, and calculating by adopting a principal component analysis method to obtain a comprehensive principal componentscore of each section; determining main pollution sections of the rivers and lakes according to the rank of the scores of the comprehensive principal components, wherein the section with the score from high to low is the section with the influence on the river and lake pollution from large to small. The analysis result of the method not only evaluates the pollution condition of each section of rivers and lakes from the perspective of historical data, but also considers the water quality change trend of each section, so that the pollution degree of each section is reflected more comprehensively and truly, and the evaluation result is more comprehensive and scientific.

Description

technical field [0001] The invention relates to the technical field of water body pollution identification, in particular to a method for identifying main polluted sections of rivers and lakes in consideration of water quality change trends. Background technique [0002] Affected by social, industrial, cultural and other factors, the degree of pollution in different areas of rivers, lakes, and reservoirs usually varies greatly. Therefore, the identification of main polluted sections is an important prerequisite for achieving coordinated water pollution control. Through the scientific and effective identification of major pollution sections, it is possible to implement targeted water pollution control or conservative maintenance under limited funding conditions, and scientifically invest important resources in key areas. At present, the main pollution section identification methods involving rivers, lakes, and reservoirs include single factor evaluation method, comprehensive ...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the existing water quality evaluation methods of rivers and lakes do not consider the future changes of water quality, and provide a method for identifying the main pollution sections of rivers and lakes that considers the trend of water quality changes, which can make the results of river and lake water environment evaluation more scientific and rigorous

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