Method for evaluating environmental flow of water-reducing river reach of river source area based on carbon metabolism rate

Abstract

The invention relates to a method for evaluating the environmental flow of a water-reducing river reach of a river source area based on a carbon metabolism rate. The method includes: firstly, analyzing and determining the carbon metabolism capability of river sediment microbial communities; and establishing a quantitative relationship between the microbial carbon metabolism rate k and the flow according to a response relationship between the flow gradient reduction and the microbial carbon metabolism rate, constructing a threshold relationship between the microbial carbon metabolism rate k andthe flow, and setting a corresponding relationship between the river health condition and the flow reduction range according to the threshold relationship; and finally forming the evaluation method for the environmental flow of the river health degree of the source region by combining a health evaluation standard based on the microbial carbon metabolism rate. The method has the advantages that the method is novel, unique and rapid in evaluation, is an environmental flow calculation method based on functional requirements, can effectively solve the problem of evaluation of the environmental flow of the source area river with a special habitat, and promotes healthy development of a river ecosystem under hydroelectric development.

Description

technical field [0001] The invention relates to a method for evaluating the environmental flow of a water-reducing river 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 structure and function of river ecosystems. In recent years, the intensification of human activities has caused significant changes in the natural flow process of rivers, changing the migration and transformation patterns of river hydrology, sediment and biogenic elements, and seriously affecting 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. [0003] At prese...

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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