A method for assessing environmental flow in water-reduced reaches of rivers based on carbon metabolism rate

Abstract

The invention relates to a method for evaluating the environmental flow of a water-reduced section of a river based on the carbon metabolism rate. First, the carbon metabolism capacity of the microbial community in the river sediment is analyzed and measured, and then the response relationship between the flow gradient reduction and the microbial carbon metabolism rate is determined. , establishes the rate of microbial carbon metabolism k Quantify the relationship with the flow, and then construct the microbial carbon metabolism rate k The threshold relationship between the flow and the flow, according to which the corresponding relationship between the river health and the flow reduction range is set. Combined with the health assessment criteria based on the rate of microbial carbon metabolism, an environmental flow assessment method for the health of source rivers is finally formed. Advantages: The method of the invention is novel and unique, and the evaluation is fast. It is an environmental flow calculation method based on functional requirements, which can effectively solve the problem of evaluating the environmental flow of rivers in source areas with special habitats, and promote the healthy development of river ecosystems under hydropower development.

Description

technical field [0001] The invention relates to a method for evaluating the environmental flow of a water-reduced section in a river source area based on a carbon metabolism rate, and belongs to the technical field of environmental flow evaluation. Background technique [0002] The protection of environmental flow is the basis for maintaining the healthy development of river ecosystems, and is of great significance to maintaining the normal functioning of the structure and function of river ecosystems. In recent years, the intensification of human activities has caused obvious changes in the natural flow process of rivers, changed the migration and transformation patterns of river hydrology, sediment and biogenic elements, and seriously affected the biological earth cycle process and the structure and function of river ecosystems. In order to maintain the healthy development of river ecosystems, it is urgent to develop appropriate environmental flow assessment methods. [0...

AI Technical Summary

Problems solved by technology

[0004] The present invention proposes a method for assessing the environmental flow of the water-reducing river section in the source area of ​​a river based on the rate of carbon metabolism. The method of segmental environmental flow can effectively solve the problem of evaluating the environmental flow of rivers in source areas with special habitats, and promote the healthy development of river ecosystems under hydropower development.

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