Method for evaluating environment flow of river water-reducing reach based on microorganism P/R value

Abstract

The invention relates to a method for evaluating the environmental flow of a river water reduction reach based on a benthic microorganism P/R value. The method includes: firstly, analyzing and determining a P/R value of a river benthic microbial community; and establishing a quantitative relation between the benthic microorganism P/R value and the flow according to a response relation between theflow gradient reduction and the benthic microorganism P/R value, searching a threshold relation between the benthic microorganism P/R value and the flow change, and setting a corresponding relation between the river health condition and the flow reduction range according to the threshold relation; finally forming an environmental flow evaluation method capable of characterizing the ecological health degree of the river by combining a health evaluation standard based on a microbial P/R value. The method has the advantages of novelty, uniqueness, quickness in evaluation and field measurement, isan environmental flow calculation method based on functional requirements, has universal adaptability to various special river habitats, and can promote healthy development of a river ecosystem underhydroelectric development.

Description

technical field [0001] The invention relates to a method for evaluating the environmental flow of water-reducing river sections 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 structure and function of river ecosystems. In recent decades, the intensification of human activities such as the construction of 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 biological elements, and seriously impacting biological processes. Earth cycle processes and the structure and function of riverine ecosystems. my country is the country that buil...

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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 environm

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