River health evaluation method based on natural and social influence

Abstract

The invention discloses a river health evaluation method based on natural and social influence. The river health evaluation method comprises the following steps that (a) an evaluation index system is established, and an evaluation factor set is determined; (b) according to the established river health evaluation index standard and determined river and lake level-5 health degree, and each level corresponds to one fuzzy subset evaluation set; (c) a single-factor subordinating degree function is determined; (d) a fuzzy relation matrix is established; (e) fuzzy weight vectors of rating factors are determined; (f) fuzzy comprehensive assessment is performed; (g) vector analysis is conducted on fuzzy comprehensive evaluation results. By the adoption of the river health evaluation method, the comprehensive evaluation results can be obtained, health degrees of single indexes can be also provided, accordingly convenience is brought to diagnosis performed by a drainage basin manager on a drainage basin water environment, and an accurate and effective management measure is implemented.

Description

technical field [0001] The invention relates to the field of water area monitoring, in particular to a river health evaluation method based on natural and social influences. Background technique [0002] As we all know, the chemical characteristics, physical habitat and aquatic organisms of water body constitute the integrity of river ecosystem. Existing studies are basically based on these three aspects to complete the river health assessment, and can be divided into three types: (a) based on the presence or absence of a single indicator species or the concentration of specific chemical indicators; (b) based on the ecological Functional integrity, using the process rate as an evaluation index (such as plant respiration and photosynthesis rate); (c) based on multiple evaluation factors, combined with comprehensive indicators of water quality, biodiversity and physical habitat to evaluate the health of the water environment. Among them, the evaluation method using a single i...

AI Technical Summary

Problems solved by technology

In addition, although the predictive model method is currently a widely used river health assessment method, it also has many limitations

For example, under the current state of the domestic environment, it is difficult for us to find an original environmental reference point that has not been damaged by human beings at all.

Even when such reference points exist, sampling and data collection of the reference points is time-consuming and costly

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