Evaluation Of Drought And Drought Mitigation Model In The Western Region Of HeilongJiang Province

China is a drought-prone countries, with population growth, rapid economic and social development, as well as the water environment of increased stress, drought and water shortage crisis in our country is increasingly becoming the most serious, the most difficult one to solve the security problem. China's total water consumption of more than 70% of water for agriculture, mainly for irrigation, water for irrigation agriculture as a whole accounted for more than 90% of water. Heilongjiang is a major agricultural province, agriculture is an important economic base. The western region is one of the important plant areas in our province, but also the distribution of surface water resources of the region at least, for the most frequent drought in the province areas, drought and water shortage has become the area's economic development one of the factors constraining . To solve the drought in the western region, enhance research capacity and drought mitigation in this area for the mitigation of the imbalance between supply and demand of water resources, improve the comprehensive grain production capacity, the state's key commodity grain base construction, promote the building of new socialist rural areas, improve the income level of farmers, are very important the role and far-reaching significance.This study analyzes the trend of drought and water shortage and the causes of the problem and to the west of Heilongjiang Province as an example an analysis of the drought. Set up a regional drought in the evaluation of the macro model and micro model, and thus give the corresponding decision-making model for drought mitigation. The main job for the following:1. Set up a regional drought in the evaluation of the macro model and micro model, respectively, of the region to carry out a comprehensive assessment of the drought and the region of an industry (mainly agriculture) to evaluate the drought (including the main crops at different growth stages and the whole reproductive evaluation of the drought period), for drought and provide a theoretical basis for evaluation.2. To the western region of Heilongjiang Province in 2002 as an example drought, drought assessment of the use of its macro-model evaluation, and analysis of the results of and departures from the results of a comparative method. Then, in 2004 as the basis of relevant information, through years of drought in arid typical comparison, estimate the volume of its water shortage.3. First of all, set up regional distribution of water resources optimization model, based on dynamic programming to solve the problem; then set up the region of water resources between different crops at different growth stages and crop irrigation water distribution model to optimize the use of the sensitivity coefficient to establish water production function model. The results showed that the application of optimized irrigation water distribution model to determine the actual than the western region 22.4 percent of irrigation water conservation, improved water use efficiency, drought resistance for the western areas of the development plan to provide a scientific basis.4. Application of fuzzy control method to further determine the reproductive stage of crop irrigation water in a moment. The results showed that the application of the original independent optimization distribution model and the fuzzy control method of the combination of organic, you can play more effective role of the two models, a more reasonable distribution of irrigation water to water-saving effects of drought, in order to provide water conservation and drought a new way of thinking.