| Taking Baojixia Irrigation District as a research object based on on-the-spot investigation and research both home and abroad, the concept of economical water-use model is proposed, and the frame system is conducted from three aspects: total quantity control of water use constraints, water-saving irrigation model and economical water distribution model.In the process of study, combining qualitative and quantitative analysis, a multi-objective programming mathematical model whose object function is to maximize economic and social benefits is set up based on the factor weight method.In this model at normal years (P=50%) water shortage is 0.0398×108m3, water saving 0.3972×108m3;at dry years (P=75%) water shortage is 3.2858×108m3, water saving 3.2035×108m3.With the irrigation district history data comparison, the model has high matching rate and applicability. |