Evaluation Research Of Running Condition And Sustainable Development For Irrigation Area

China is a large agricultural country, meanwhile, it is an irrigated country, so the irrigation areas take a very important position in our national economy. However, now the aging and destruction of most irrigation structures in our courtry have been a widespread phenomenon. The irrigation areas are difficult to run, so it is imperative to perform the rebuilding and water-saving project. In view of that, this article conducts a comprehensive evaluation of running condition and sustainable development level for Donggang irrigation area in Liaoning. So that it can offer the basis of rebuilding order and fund allocation of irrigation areas. The main research contents and conclusions are as follows:(1) This acticle introduces the basic situation of irrigation area in our country, including the definition, classification and development process, generalizes the position and function of irrigation area in our national economy, and points out the difficulties and opportunities.(2) This acticle generalizes the establishment principles and problems of evaluation indexes system, and introduces a method of establishing evaluation indexes: in order to satisfy integrality and representative, the spearman rank correlation coefficient is introduced based on the evaluation indexes system of irrigation area proposed by China Irrigation & Drainage Development Centre. Combined with experts consulting method, the paper proposes a set of evaluation index system of irrigation areas. This method is innovative and generalized. Based on comparing with various evaluation models, this article points out the existing problems and development trend of irrigation area evaluation research.(3) Several representative weight determined methods are provided in this paper, which includes expert evaluating method, analytic hierarchy process, rank correlation analysis method, method of defining weight based on rough sets theory, variation coefficient method, entropy method, grad scale-up method, simple correlation function method. This acticle generalizes the advantages and disadvantages of them and their application conditions. Based on these, this acticle puts forward a comprehensive weight defining method based on game theory. Through the method, index weight can be more reasonable.(4) Fuzzy comprehensive evaluation model is an effective multi-factor decision model, and it is widely used in every aspect of national economy. In this peper, the model is used to evaluate irrigation area's running condition. The objective weight is defined by variation coefficient method, the subjective weight is defined by rank correlation analysis method, and the comprehensive weight is defined by game theory method. The evaluation result shows that the running condition of Donggang irrigation area is increased, and the increased range of Youyi irrigation area is the most significant. Through the relative result, irrigation areas are compared not only in horizontal orientation but also in longitudinal orientation, and the result fits the actual condition well.(5) By means of extension, a formalized tool, extension assessment model can be used to reflect whole level of irrigation area by establishing evaluation model of multi-index parameters. The improved matter-element extension assessment model is introduced in this paper. At first, in order to eliminate the evaluation effect of different unit and dimension, the indexes data are normalized; secondly, the method uses the game theory to determine the index weight. Compared with the calculating weight method in original matter-element extension assessment model, it overcomes the deficiency of relying on index data whereas ignoring the importance of indexes. The improved model is developed to evaluate the running condition of irrigation areas, and the grade variable characteristic values are obtained. Compared with other methods, this method gives out grade of irrigation area exactly.(6) A sustainable development evaluation model of irrigation area based on I.D.C. trend degrees of set pair analysis is put forward in this acticle. With simple form and theory, this model is not limitted on the numbers of evaluation indexes, and it is not necessary to define index weight in calculation process. An exponent model of coordinative development between the project condition, economy profit and eco-environment is set up, in which the coordinated development relationship of mutual influence and limit is revealed. The evaluation result shows that the whole trend of sustainable development level of irrigation area is increased, and it is approximately coordinative in 2006. The evaluation result is reasonable, so the model provides a feasible method for sustainable development evaluation for irrigation area, and supplies a new way for irrigation area evaluation.(7) At last, this acticle summarizes the research conclusions, and gives out the characteristics and innovations. Besides, the problems needing further research are proposed in this acticle.