Health evaluation method suitable for reclaimed water replenishment river

Abstract

The invention discloses a health evaluation method suitable for a reclaimed water replenishment river. The health evaluation method is applied to the fields of sewage recycling and water environment monitoring and evaluation. The method comprises the following steps: firstly, arranging sampling points according to a reclaimed water supply port and upstream and downstream conditions thereof, collecting a water sample and a bottom mud sample, and carrying out detection and index calculation on hydrology, water quality, water ecology and microbial communities; secondly, screening hydrology, water quality, water ecology and microbiological indexes by adopting principal component analysis and correlation analysis methods; thirdly, carrying out weight calculation on the standardized index data by adopting an entropy weight method; and finally, according to the indexes and the weights thereof, calculating comprehensive health indexes, and dividing five health evaluation grades according to quantiles. According to the method, the defect that a health evaluation method for reclaimed water replenishment rivers is lacked is overcome, and the long-term health influence of reclaimed water on the river water environment can be reflected.

Description

technical field [0001] The invention belongs to the fields of sewage resource utilization and water environment monitoring and evaluation, and in particular relates to a health evaluation method suitable for regenerated water supply rivers. Background technique [0002] Due to the aggravation of water scarcity, seasonal rivers in the north will dry up in some seasons. With the trend of sewage recycling, reclaimed water has become an important water source to maintain the ecological flow of rivers in northern water-scarce rivers. The recycling of sewage can make full use of unconventional water resources, promote the reduction of water pollution load, and expand the environmental capacity. However, compared with the water quality of natural landscape water bodies, the concentration of nitrogen and phosphorus pollutants in reclaimed water is still high, which can easily cause the problem of eutrophication of water bodies. Avoiding algae blooms is also one of the key points i...

AI Technical Summary

Problems solved by technology

[0004] At present, the existing river health assessment methods in my country are generally based on the watershed scale, and there is a lack of health assessment methods suitable for urban landscape rivers, especially reclaimed water supply rivers.

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