| Baicheng city is located in the low plain of west Jilin, where is a transitional zone of drought from semi-arid to semi-humid temperate climate, from semi-humid forest grassland to semi-arid and desert area due to its special geographical position, and always responses environmental and climate change of sensitive areas. It collects drought and waterlogging, salt, water and degeneration, worsening ecological environment problems in an area.There are nine years with drought in ten years in Baicheng city, mainly spring drought, second summer and autumn drought. The annual maen precipitation is 400 mm of which mainly concentrated in July to September accounting for about 70%of the annual precipitation. The annual average evaporation is 1800 mm, mainly focused in April and September and accounting for 80%. Domestic main rivers include Nenjiang river, Tao'er rive, Huolin rive, Jiaoliu river, Hu'erda river, Erlongtao river, Emutai river and Wenniugechi river.There are over 700 lakes with different size and most of them have been dried in recent years. Groundwater resource become the main source of life and production.From the northwest to the southeast of Baicheng City, where there are low mountains, hills, mesas and plains in order, the geomorphologic division is obvious. Hills District Physiognomy is mainly tectonic denudation topography, but Plain District landform is mainly erosion deposits topography and accumulation terrain. Stratums distribute from the old to new, which are from Cretaceous Mingshui Formation, Tertiary Da'an group and Taikang group, Quaternary lower Pleistocene series Clay Hill group, mid Pleistocene series DaQinggou group, to upper Pleistocene series Guxiang Village group and Holocene.The plain terrain of Baicheng City located the north-central of the basin between Songyuan city and Liaoning Province. The basin formed in the late Jurassic and the early Cretaceous, depositing sedimentary thick the Cretaceous strata inside. Law of deposition is bottom-up and from the coarse to fine, where the top is mainly clay-shale. Growth strata contain mainly Carboniferous Permian, Jurassic, Cretaceous, Tertiary and Quaternary, except Paleogene. The main aquifers in the region are:the upper Pleistocene series-Holocene alluvial gravel, sand and gravel table water aquifer, alluvial lake sand and loess-like sandy loam table water aquifer of Guxiang Village group except Hills District and Tao'er River Alluvial Fan area, Clay Hill group lacustrine sand gravel Semi-confined aquifer, and sandstone,sandy conglomerate porous fractured confined aquifer of Upper Tertiary Taikang-Da'an group without Hills District.The main chemical types of groundwater in the whole city are heavy calcium carbonate type and sodium bicarbonate type. During this period, it appeared heavy magnesium carbonate-based water, and found hloride-type water in some individual lots. Besides this, it emerged calcium sulfate-based water in 2009. Therefore, it is easy to find that the chemical types of the groundwater in Baicheng City are diverse.Total water resource of the city is 22.72 billion m3 per year, including:natural groundwater resources are estimated to 20.83 billion m3 per year, surface water resources are 1.89 billion m3 per years. The available groundwater resource is 15.39 billion m3 per year, accounting for the amount of groundwater natural resources 73.88%. The city's main supply of groundwater sources: precipitation recharge, river leakage supplies, field supplies and areas outside the irrigation supplies, in which, the average years of precipitation recharge capacity is 18.64 billion m3 per year; water seepage recharge 1.69 billion m3 per year; field irrigation infiltration recharge back to 3200 million m3 per year; lateral to the recharge zone for the 1800 million m3 per years. Mainly excrete as evaporation and groundwater exploitation. Comprehensive assessment of centralized drinking water and industrial and agricultural use of water according to water quality monitoring data gather from quality monitoring wells:PH value 7.3～8.0; mineralization in the 124 2474mg/L between; turbidity, NH4+, Fe, Cl" ions in the city generally exceeded; NO2-, NO3-, As, total coli forms exceeded in some areas in the city.Consider 2008 as status quo, under Baicheng City "Eleventh Five-Year Plan" Program and according to different economic, population growth and water use in different standards, this paper forecasted 2011 and 2020 water demand and then analysis supply-demand balance. In 2011, the total water demand is 59.11 billion m3,of which agricultural water demand is 48.45 billion m3, industrial water demand is 1.60billion m3, domestic water demand is 6100 million m3, eco-environmental water demand is 8.45 billion m3; 2020, the city total water demand is 60.68 billion m3, of which agricultural water demand is 48.39 billion m3, industrial water demand is 3.13 billion m3, domestic water demand is 7100 million m3, eco-environmental water demand is 8.45 billion m3. Through analysis of supply and demand balance,2011, available quantity of water is 29.32 billion m3, of which the available groundwater is 15.39 billion m3, the amount of surface water is only 4000 million m3 per year, transit utilization of water resources is 13.53 billion m3, of which:Chaersen reservoir at Tao'er River upstream provider 2.80 billion m3, regional run-off provider 1.70 billion m3, the existing hydraulic pump 9.03 billion m3 from Nenjiang River. Not consider eco-environmental water demand, the total short of water is 21.34 billion m3, such as to consider the eco-environmental water demand, the total short of water is 29.79 billion m3; 2020, available quantity of water is 37.19 billion m3, of which the available groundwater is 15.39 billion m3, surface water is 4000 million m3, transit utilization of water resources is 21.40 billion m3, of which Tao'er River is 4.50 billion m3, Nengjiang River is 16.90 billion m3. Not consider eco-environmental water demand, the total short of water is 15.04 billion m3,such as considering the eco-environmental water demand, the total short of water is 23.49 billion mj.Over the years, agricultural water use accounted for 85%of the amount of groundwater development and utilization in the study area. According to the control theory and legal basis of water resource development and utilization, and base on deep analysis of the irrigation district development and agricultural water demand, in this paper, the work is calculated the exploitable water resources of each administrative division and hydrogeology division in the study area use of rainfall infiltration and evaporation difference method, through dynamic factors on groundwater analysis. This paper determined a control program of water resource development and utilization and delimited the groundwater lever management for Tao'er River alluvial fan area. This paper developed a plan of Tao'er River alluvial fan area groundwater level management and brought up a configuration of surface water and groundwater in the study area.In short, all possible technical and management measures should be taken to improve the city's water reuse, control the high consumption of water industry, improve the technology and equipment to reduce water consumption per unit of product, adjust agricultural distribution, control the development of large water crop acreage. Water-saving irrigation technology should be promoted to improve water use efficiency. All these are to protect the water resource of Baicheng City and achieve sustainable economic and social development through sustainable use of water resources.
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