A method for assessing environmental flow in river water-reduced reaches based on microbial p/r value

Abstract

The invention relates to a method for evaluating the environmental flow of river water-reduced reaches based on the P / R value of benthic microorganisms. First, the P / R value of the benthic microbial community of the river is analyzed and measured, and then the P / R value of benthic microorganisms is reduced according to the flow gradient and the P / R of benthic microorganisms is determined. The response relationship between the P / R values ​​of benthic microorganisms and the flow rate was established, and then the threshold relationship between the P / R value of benthic microorganisms and flow changes was sought, and the river health status and flow reduction range were set accordingly. corresponding relationship. Combined with the health assessment criteria based on the microbial P / R value, an assessment method of environmental flow that can characterize the ecological health of the river is finally formed. Advantages: the method of the invention is novel and unique, rapid in evaluation, and can be measured on site. It is an environmental flow calculation method based on functional requirements, has universal adaptability to various special river habitats, and can 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 river section based on the P / R value of river benthic microorganisms, 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 decades, the intensification of human activities such as the construction of water conservancy irrigation projects, water diversion projects, and dams has caused significant changes in the natural flow process of rivers, changing the natural hydrological regime of rivers, the migration and transformation patterns of sediment and biogenic elements, and severely impacting biological processes. Earth cycle processes and the structure and function of river ecosystems...

AI Technical Summary

Problems solved by technology

[0004] What the present invention proposes is a kind of method based on microbial P / R value assessment river dewatering section environmental flow, and its purpose is to overcome the deficiency of existing assessment method, develops a kind of method based on river benthic microbial P / R value assessment river dewatering. The method of environmental flow in the river section can effectively solve the problem of assessing the environmental flow of rivers in various habitats, avoid the inability to carry out environmental flow assessment due to lack of data, and promote the healthy development of the downstream ecosystem of the river under the construction and development of hydropower

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