Comprehensive Evaluation Investigation For Regional Water-saving Irrigation Development Level

Water saving irrigation Promoted vigorously is the strategic choice and a basic state policy of our country to ease the shortage of water resources. An accurate evaluation of regional water saving irrigation development level is of developing of them with scientific planning and construction. And, it is the key to relieve the tense situation of water, promote the efficient of water resources usage and ensure the sustainable development of agricultural production in the region. It is also of great significance for promoting the scientific development of water saving irrigation, ensuring regionalwater security and food security.Sichuan is a province with more grain production in china. In this paper, many main resluts are acquired by combining influence factors of water saving irrigation development and detailed investigation of real situation of different water saving developing regions of sichuan province in2010, main conclusions of the study are as follows:(1)According to influence factors of water saving irrigation developing in Sichuan province, Evaluation system of regional engineering, agronomy and management water saving development is constructed with33items of indices selected. Then,14comprehensive evaluation indexes were selected by reducing the dimensions of33indices, and the comprehensive evaluation system of regional water saving irrigation is constructed. Three evaluation models of comprehensive evaluation are established based on similarity to ideal solution evaluation method (TOPSIS),variable fuzzy assessment method (VFT) and set pair analysis method (SPA). The results of three models indicate coincidently that water saving irrigation development level in Sichuan is "poorer", the level in various regions is different, and the development potential is large.(2)There are some differences of evaluation results by three models. But, all of the results reflect the real situation by them. TOPSIS model most close to the real situation. SPA evaluation method is simple and calculation is concise, but it is difficult to compare the water saving level in different regions of the same rank. The evaluation result by VFT model is better than the former two methods.(3)Three kinds of evaluation models can be applied in comprehensive evaluation investigation for regional water-saving irrigation development level in Sichuan province,the evaluation results by the three models can accurately reflect the regional water saving irrigation development level. TOPSIS model is the most accurate, followed by VFT model and the last is SPA model. TOPSIS model can be applied to comprehensively evaluate the water saving irrigation development level in different areas.(4)The main aspects of development in different water saving irrigation regions in future are as follows:The development priorities of different water saving irrigation areas in Sichuan in future different are as follows, Under the premise of full and rational usage of local runoff, water can be transferred from the mountain areas around the Sichuan basin to the abdominal area of the basin. Many new projects of large and middle-scale irrigated area are established. Channel impervious and field projects are also established for large and middle-scale irrigated area established in past times. In region of mountain areas around Sichuan basin, the development keys are field engineering auxiliary projects, seepage prevention projects for channel built in past times, constructions of key counties of small-scale irrigation and water conservancy, development of technology of delivering water and irrigating with low-pressure pipes, engineering renovation of all kinds of irrigation areas. In PanXi mountain region, the development keys are water saving reform of all kinds of irrigation areas and water source engineering renovation, constructions of key counties of small-scale irrigation and water conservancy. In the western mountain plateau area, under the premise of ecological environmental protection, the development keys are the water conservancy construction accelerated in pastoral areas, constructions of key counties of small-scale irrigation and water conservancy, extending the more efficient technology of water saving irrigation of irrigating with pipes and sprinkling irrigation.