Method for determining dynamic water quality target of urban river section

Abstract

The invention provides a method for determining a dynamic water quality target of an urban river section, which belongs to the field of water environment treatment. The method provided by the invention comprises the steps that a an indicator framework system which affects the determining of the water quality target of the urban river section is established; b an analytic hierarchy process is usedto judge the importance of indicators and analyze and calculate the weights of the indicators; c graded quantitative evaluation is carried out individual evaluation indicators; and d a weighted average method is used to calculate the comprehensive score of an indicator set to determine high, medium and low water quality target levels. According to the invention, a conventional method for determining the water quality target of an urban river based on functional requirements is optimized; a watershed manager can formulate the water quality target of the river according to hydrological and hydraulic conditions, water quality conditions, functional needs and other different characteristics of the river, so that the target determination is more reasonable and feasible; and the method can be used by urban river health evaluation, ecological evaluation, water environment carrying capacity evaluation and other evaluations for reference, and has good versatility.

Description

technical field [0001] The present invention proposes a method for determining the dynamic water quality target of an urban river, which can scientifically determine the cross-section water quality target based on the river channel's own conditions, optimize the "one size fits all" water quality assessment method according to the water function zone standard, and make the river basin management project more economical and efficient. Determination of water quality targets for river courses is an important topic in the field of water environment governance. Background technique [0002] At present, urban rivers generally adopt a fixed cross-section water quality assessment method. The water quality of the cross-section mostly considers the functional requirements of the water quality of the water body, implements the water quality standard of the water environment functional area, and the standard is fixed throughout the year, making the cross-section not up to the standard oft...

AI Technical Summary

Problems solved by technology

[0012] Compared with the United States, it can be seen that the domestic fixed water quality standards are relatively simple, only considering the water quality functional requirements of the river, without systematic consideration of various other factors that affect the water quality of the river, such as its own hydrodynamic conditions, water catchment conditions, etc., and cannot effectively stimulate water quality. Stakeholders in the upper and lower reaches of the river basin and between regions are motivated to make full use of the environmental capacity. In addition, my country’s water quality standards are closely related to cross-section assessment. The adoption of constant cross-section water quality standards may easily lead to “over-protection” of the water environment in some areas, while others Areas will be "underprotected", so dynamic water quality standards will be necessary

Judging from the current performance assessment of PPP projects in domestic water environment management, there is also a great demand for establishing dynamic section water quality assessment standards, but there is currently a lack of research on the quantification of water quality standards

Images