A dynamic evaluation method of water resources benefit based on variable fuzzy decision theory

Abstract

The invention relates to a dynamic evaluation method of water resources benefit based on variable fuzzy decision theory, which comprises the following steps: step 1, constructing a dynamic evaluationmodel of water resources benefit; 2, carrying out dimensionless processing on the index value in the step 1; 3, determining the weight vector of the qualitative index and the quantitative index; 4, evaluating the comprehensive benefits of water resources by using the variable fuzzy decision theory, and obtaining the relative membership degree of each scheme; The invention considers the influence of qualitative index on water resources benefit evaluation, a dynamic evaluation index system of water resources benefit is established, which includes both quantitative and qualitative indexes, By using the variable fuzzy decision model of variable fuzzy set theory, through the change of model parameters such as index weight, index standard value and the solution of model set, the problems of difficult quantification, incomplete evaluation index and simplification of evaluation model in the selection of water resources benefit evaluation method are solved, and the credibility and reliability of optimization decision-making are improved.

Description

technical field [0001] The patent of the invention belongs to the comprehensive field of water resources management, and specifically relates to a dynamic evaluation method of water resources benefits based on variable fuzzy decision-making theory. Background technique [0002] Water resources are a prerequisite for the survival of human beings and all living things, and an essential material for promoting social development, social progress, and ecological environment improvement; It is of great significance to evaluate the degree of coordination between social benefit evaluation and social economic development. [0003] The comprehensive benefit evaluation of water resources involves related indicators in various fields such as economy, ecological environment, society, technology, resources, etc. Some of the indicators are quantitative, such as the increase of grain output and industrial output value, and some are qualitative indicators that are difficult to quantify, such...

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Problems solved by technology

[0003] The comprehensive benefit evaluation of water resources involves related indicators in various fields such as economy, ecological environment, society, technology, resources, etc. Some of the indicators are quantitative, such as the increase of grain output and industrial output value, and some are qualitative indicators that are difficult to quantify, such as water The comprehensive utilization of resources improves the life satisfaction of local people, etc. Therefore, the water resources comprehensive benefit evaluation system is a multi-level, multi-objective semi-structural evaluation system with both quantitative indicators and qualitative indicators; currently, small watersheds in the Loess Plateau, The evaluation system of water resource utilization benefits such as the Liyuan irrigation area in the middle reaches of the Heihe River has been established, and the AHP is used to evaluate; The complex multi-objective evaluation model is solved by a single evaluation model; second, the evaluation index system mostly involves the analysis of quantitative indicators, and some qualitative indicators that are difficult to quantify in the ecological environment and social benefits are rarely mentioned or simply described in words. It is not included in the index system, which affects the reliability of the evaluation; therefore, a dynamic evaluation method of water resources benefit based on variable fuzzy decision-making theory is provided that considers the impact of qualitative indicators on the evaluation of water resources benefits and constructs both quantitative and qualitative indicators. is very necessary

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