Study On Optimal Dispatching Of Water Resources And Intelligent Control Strategy In Irrigation District

With the rapid development of social economy,the relationship between water supply and demand produce a serious imbalance.How to coordinate this supply and demand is a hot topic for current researchers.Agricultural water occupies the largest part of water use and which is the main part of agricultural water.Based on the relationship between crop water demand and surface water supply in large-scale irrigation areas in my country,this paper takes irrigation water demand in irrigation areas as the water supply target,and studies the optimal scheduling of water resources in irrigation areas during the crop growth stage with or without external water supply.The specific research content and research results are as follows:1)Combining the growth law of crops,using the water production function to establish a mathematical model of crop water demand and crop yield;using Jensen formula to solve the water sensitivity index of each growth stage of the crop and then obtaining the water sensitivity index weight coefficient are the larger the weight coefficient value.It shows that the more likely the crop is in the critical period of water demand,the greater the demand for water.Two methods are used to calculate crop water demand and combined with the effective rainfall in the irrigation area,and the crop irrigation water demand in the irrigation area is obtained.2)Taking the water supply reservoir of the irrigation area is the research object,with the purpose of solving the problem of water supply dispatching from multiple water sources,constructing the water supply optimization model of the irrigation area with multiple water sources under the condition of insufficient water supply.The objective function is to maximize the overall economic benefit of the irrigation area.The water supply is a variable and the interval programming algorithm is used to solve the model to obtain the optimal economic water supply plan.3)Studying the irrigation area under insufficient irrigation conditions,establishing a scheduling optimization model with the minimum water shortage rate,and introducing the water sensitivity index into the irrigation water shortage rate in the irrigation area,which is suitable for the optimal scheduling of water resources between different growth stages of crops.The purpose of water save in irrigation areas,while achieving higher crop yields.Combined with the characteristics of water supply and demanded in the irrigation area of the lower Luan River,the practical value of the model is verified.Research on the optimal dispatch of water resources is conducive to the control and dispatch decision-making of the irrigation area and has certain reference value for improving the irrigation water utilization rate of the irrigation area and ensuring the sustainable development of water resources.Figure 11;Table 7;Reference 53...