Watershed-based river health assessment method and device

Abstract

The present disclosure relates to a watershed-based river health evaluation method and device. The method includes: obtaining index data of multiple evaluation indicators of river health in the watershed within a preset time period; The probability function distribution of the value; according to the probability function distribution of the value of each evaluation index, calculate the information entropy value corresponding to the evaluation index; use the preset correction algorithm to correct the information entropy value to obtain the corrected information entropy value; calculate according to the corrected information entropy value of each evaluation index and the number of evaluation indexes, and obtain the information entropy weight corresponding to the evaluation index; according to the corrected information entropy value of each evaluation index and the corresponding information entropy weight, calculate The river health index of the basin; analyze the river health index and evaluate the development trend of river health. Through this technical solution, the river health index is obtained through entropy weight analysis and calculation, which provides a scientific basis for the decision-making of river basin system governance.

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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