Assessment On Water Resources Security In Minqin Oasis

Water resources security is not only an ecological issue, but also an economic,social and political issue directly related to national security. Security issue of water resources has increasingly become the focus of attention around the world, countries put a lot of manpower and material resources to study and solve the security problems of water resources. Tension of water resources for the countries and regions, water has become related to the survival and development of strategic issues, but also affect the national security and international relations. It is therefore necessary to the security of regional water resources issues in-depth study in order to secure regional water resources assessment of objective truth. On the basis of comprehensive understanding of the concept of water resources security, fuzzy optimization model for evaluation of Minqin Oasis water resources security is established upon multi-objective and multilevel fuzzy optimization theory. This work can understand the past 5 years situation of water resources security in Minqin Oasis,understand the natural and man-made factors that affect the security of water resources and its ecological effects and reveal the formation mechanism.The paper wants to give a view to the sustainable development decision-making support in Minqin Oasis. The paper has seven parts.The first part raises the article background and outlines the security of water resources research at home and abroad, on this basis, discusses the purpose of this study and the significance of the theory and methods.The second part provides an overview of the study area about the main natural and socio-economic conditions.The third part describes the security of water resources problems in the study area, including surface water resources decline year by year;excessive exploitation of groundwater;natural vegetation degradation, loss of biodiversity,the strengthening trend of land desertification and other issues.The fourth part establishes the evaluation index system of water resources security in Minqin Oasis which comes from the existing evaluation system and the study area based on the current status of water security to the scientific nature.The fifth part establishes the fuzzy optimization model for evaluation of Minqin Oasis water security upon multi-objective and multilevel fuzzy optimization theory. Based on the degree of water shortage in water resources of the Minqin Oasis safety evaluation showes that: recently 5 years the water in Minqin Oasis in a state of insecurity, of which 2003,2006 and 2007 in a state of insecurity,2004 and 2005 in a state of crisis. Based on multi-objective and multi-level fuzzy optimization model showes that:the situation of Minqin oasis'water resources tends to become good. The past 5 years, the security situation in Minqin oasis water from good to bad is the sort in 2007 (0.7632)→2006(0.6735)→2003(0.5765)→2005(0.5569)→2004(0.5046). In 5 years, the decision-making membership degree in Minqin Oasis in general is gradually increasing, which to some extent from that the situation of Minqin oasis'water resources tends to become good. The decision-making membership degree to 2004 in Minqin Oasis is the smallest degree, which showes that the worst water resources security situation is in 2004. In addition, although the overall situation of water resources in Minqin Oasis tends to become good, the Minqin oasis'water supply and demand contradiction, the environment, food security, drinking water security and control of disasters showes the different characteristics.The sixth part puts forward Minqin Oasis'countermeasures to protect the safety of water resources security from the contradiction between supply and demand of water resources, protecting ecological environment, ensuring food security, protecting drinking water security and strengthening control measures.The seventh part makes a summary of the full text and showes the process of thesis writing deficiencies, as well as future needs to further refine and consider.