Large-area agricultural irrigation area water resource balanced and efficient allocation method for coping with climate change

Abstract

The invention discloses a large-area agricultural irrigation area water resource balanced and efficient allocation method for coping with climate changes. The method comprises the following steps: S1, collecting basic data; S2, constructing a crop water utilization efficiency function, and quantifying crop water resource allocation in the research area; S3, constructing an economic benefit function of crops, and quantifying economic benefit distribution fairness based on a user jeay value; S4, constructing a social welfare function, establishing a multi-objective optimization model, and balancing the water resource allocation efficiency and economic benefit fairness of the irrigation area; S5, setting a model boundary; S6, constructing a Bayesian network, and determining meteorological variables influencing the runoff of the research area; S7, constructing a multi-objective optimization model, and calculating large-area agricultural irrigation area water resource allocation data coping with climate changes. According to the method, the comprehensive effect of multiple targets is considered, the economic benefit relation is processed from subjective and objective angles, the uncertainty of the influence of multiple factors on runoff is comprehensively considered from the current situation and the future, and therefore sustainable and efficient management of water resources in an irrigation area is achieved.

Description

technical field [0001] The invention belongs to the technical field of agricultural water management, and in particular relates to a method for balancing and efficiently allocating water resources in large-area agricultural irrigation areas in response to climate change. Background technique [0002] Agricultural water resources are important strategic resources to ensure agricultural production. At present, the shortage and uneven distribution of water resources in time and space are important constraints on my country's food security and ecological security. With the increasing demand of the people for food, the contradiction between the supply and demand of agricultural water resources has become increasingly prominent. In addition, extreme weather conditions exacerbate the uncertainty of water resources and restrict the sustainable development of agriculture. As the center of agricultural production in my country, agricultural irrigation areas are an important pillar to...

AI Technical Summary

Problems solved by technology

The existing optimal allocation model of water resources, when dealing with the relationship of economic benefits, only calculates the economic income and output from an objective point of view, fails to consider the subjective factors of customers and the fairness of resource allocation, and timely evaluate the actual situation of each water use unit. Appropriate adjustments are made, so there is no universality and flexibility

In addition, the existing optimal allocation models of water resources seldom take into account the coupling uncertainty among various hydrometeorological elements, while changes in natural conditions such as rainfall and runoff caused by climate change lead to stochastic uncertainties in the supply of water resources , which limits the calculation accuracy and application range of existing models

Images