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The issue of water resources is important constraints for China to achieve the development strategy of the new century. Both from population and economic growth, or from urban development and food security needs, the need to provide important support and protection of water resources. Especially of widespread drought and water shortage, floods and deterioration of water environment three water problems, the overall impact on the national economy and social development. The water resources of scientific research has become the focus of attention and focus by the international academic community and the Governments and even the public. Do this need to further strengthen the sustainable use of water resources strategy, through the study of the balance between supply and demand of water resources and the carrying capacity situation, the effective management of water resources, to achieve the sustainable use of water resources, the protection and the promotion of sustainable economic and social development. Daqing City, the study area is the largest oil and gas production base, composed of the Saar map, Xingshugang, 48 oil and gas fields, oil-bearing area of ??over 6000 square kilometers. Since 1960, the development and construction of the Daqing Oilfield create a Chinese oil industry, \Daqing City, a relative shortage of water resources, and the obvious contradiction between supply and demand, the water quality of the environment is not optimistic. Native large area of ??low-quality groundwater, the obvious secondary water pollution, poor water quality conditions. Daqing City is facing a resource-exhausted cities to the transformation of the economically developed cities, the demand for water is more urgent. Therefore, in the Daqing City water supply and demand balance on the basis of analysis and forecast, in-depth research in the area of ??water resources carrying capacity and optimal allocation problem is particularly important to improve the sustainable carrying capacity of water resources to achieve ecological sustainable use of resources. At the same time, great significance to the promotion of oil field of sustainable development and build a resource-saving and environment-friendly society, also provide strong protection for high and stable yield of Daqing Petroleum. Daqing City, water resources development and utilization of systems analysis, the main contents and results are as follows: (1) combined with relevant research data, analysis of the Daqing City, water resources development and utilization, Daqing surface water resources during the year with significant abundance dry alternating characteristics, precipitation, runoff distribution is uneven. Utilization of water resources the main outer cited the Nenjiang water formed off of water resources. Groundwater after years of mining, and has formed two things groundwater drawdown funnel. Agricultural irrigation water irrigation quota, low coefficient of irrigation water use; industrial, domestic water, water consumption has increased year by year, and wasting in serious condition. (2) In accordance with the pattern of socio-economic development of Daqing City predictable and sustainable development of water resources demand forecast for the next decade Daqing water demand respectively Trend epitaxy, the recycling rate increased law, defined industry, agriculture analysis, living and ecological environment water demand is calculated. Been calculated, 2008,2015,2020 total water districts and counties in Daqing City life, industrial, agricultural, ecological 1.34 billion m, to 3,15.92 one hundred million m ~ 3,18.21 Billion m to 3. Water demand \the amount of 1.006 billion m to meet the Daqing City to meet the water needs of national economic development and urban construction. (3) using the analytic hierarchy process, namely the use of a computational model of macroeconomic indicators, the calculation model of individual indicators, the composite indicator calculated evaluation model of water resources bearing capacity of Daqing City in 2008, to predict the water resources carrying capacity in Daqing City in 2015 and 2020 . Daqing City in 2008 bearing capacity index calculated an average of 0.718, the Harmonized Index of 0.693, resources carrying capacity in Daqing City as a whole has exceeded the carrying capacity of the reference to the evaluation of regional development and utilization potential is relatively low, at the same time to develop the use of unreasonable resulting in poor coordination situation. Adjust according to the situation of water resources in Daqing City, economic development, planning, evaluation index system in terms of water resources carrying capacity, drawn by the predicted results: integrated water-saving measures in 2015 and 2020 to improve water use efficiency , the city's districts and counties are water resources are hosted.
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