River basin-based river health evaluation method and device

Abstract

The invention relates to a river health evaluation method and device based on a drainage basin. The method comprises the steps of obtaining index data of multiple evaluation indexes of river health of the drainage basin in a preset time period; determining the possibility function distribution of the value of each evaluation index according to the index data of each evaluation index; according to the possibility function distribution of each evaluation index value, calculating an information entropy value corresponding to the evaluation index; correcting the information entropy value by using a preset correction algorithm to obtain a corrected information entropy value; calculating according to the corrected information entropy value of each evaluation index and the number of the evaluation indexes to obtain an information entropy weight corresponding to the evaluation index; calculating a river health index of the drainage basin according to the corrected information entropy value of each evaluation index and the corresponding information entropy weight; analyzing the river health index, and evaluating the river health development trend. According to the technical scheme, the river health index is obtained through entropy weight analysis and calculation, and a scientific basis is provided for drainage basin system governance decision making.

Description

technical field [0001] The present disclosure relates to the technical field of watershed development evaluation, in particular to a watershed-based river health evaluation method and device. Background technique [0002] A river system is a huge system covering elements such as water resources, floods, and sediments. There are many elements, and the relationships between elements, between elements and systems, and between river systems and other systems are intricate. The concept of river health is a biological and ecological extension of the concept of human health. River health is an important research content in the field of water governance. [0003] The Yellow River is the mother river of the Chinese nation. Its basin spans the eastern, central and western parts of my country. It is an ecological corridor connecting the Qinghai-Tibet Plateau, the Loess Plateau, and the North China Plain. It constitutes an important ecological barrier and economic zone in my country. T...

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Problems solved by technology

The subjective weighting method is based on experience, can express the preference of decision makers, and has strong subjective initiative, but lacks rigorous mathematical derivation formulas and insufficient theoretical basis. Common methods include Delphi method, analytic hierarchy process (AHP) method, and binary comparison. method, etc.; the objective weighting method is based on theory and has a rigorous mathematical derivation process, which can dig out the objective laws hidden in the data set and eliminate the arbitrariness in determining the weight, but it cannot reflect the preferences and wishes of decision makers. Maximum deviation method, CRITIC method, entropy weight method, etc.

Generally speaking, although domestic and foreign studies in recent years have considered river health issues, their diagnosis or evaluation methods have not studied the entire river system from the perspective of system theory, or the determination of the weight of the index system is too subjective. Applicable to the complex water-sediment relationship conditions in the Yellow River Basin

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