Water ecological function zoning based river close-to-nature condition evaluation method

Abstract

The invention discloses a water ecological function zoning based river close-to-nature condition evaluation method, which comprises the steps of (1) selecting a corresponding river on which close-to-nature condition evaluation is performed; (2) selecting reference points; (3) selecting indexes; (4) performing data standardization; (5) determining the weight; (6) determining the scoring standard; and (7) carrying out river close-to-nature condition judgment. The water ecological function zoning based river close-to-nature condition evaluation method adopts a statistical method to determine the index layer weight, is objective, simple and convenient in determination method, not only takes sustainable development and ecological protection into account, but also reduces a result error brought about by expert scoring or technician experience and is consistent with the idea of water environment zoning and grading management in China. According to the invention, the evaluation method is simplified through directly setting the river close-to-nature condition evaluation standard on a target layer, thereby being convenient for an environment manager to establish scoring standard systems for different water bodies quickly, and expanding the application range of the method.

Description

technical field [0001] The invention relates to a method for evaluating the near-natural state of a river based on water ecological function zoning. Background technique [0002] The ecological degradation of rivers has become a global environmental problem and has attracted widespread attention at home and abroad. my country is a country with many rivers, but more than 2 / 3 of the rivers are disturbed by human activities to varying degrees. With the rapid development of social economy and the improvement of national environmental protection awareness, people's requirements for ecological restoration or recovery of degraded river ecosystems are becoming more and more urgent. Traditional river management projects are mostly based on the premise of flood control and drought relief, resulting in poor horizontal and vertical connectivity of the river, which in turn affects the health of the river ecosystem, reduces the self-purification ability, self-recovery ability and ecologi...

AI Technical Summary

Problems solved by technology

Therefore, completely copying the traditional river ecosystem health assessment method will ignore the needs of the sustainable development of human society to a certain extent, not enough to reflect the connotation of "near nature", and the connection with the realistic goal of river ecological restoration is not strong

In addition, my country's current relatively mature near-natural evaluation system is mainly applicable to small rivers and streams, which cannot meet the needs of many rivers in my country for the evaluation of near-natural conditions.

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