Study On Evolution Of Water Resources Characteristics In Manas River Basin Under Conditions Of Climate Change

In the global climate warming background, with glacier snow melt water based in aridinland river basin water resources system is very fragile and sensitive: temperature will causethe snowmelt runoff seasonal changes causing alteration of water resources. Waterconservancy infrastructure is not perfect and the backward management technology hasincreasingly prominent contradictions between water resources supply and demand isrestricting the development of regional economy. At the same time, due to the extreme climateevent frequency and intensity are increased, and this is exacerbated by climate warming onthe arid inland river effect. The results show that, climate change is likely to continue toincrease the basin water resources shortage and instability, development of climate change onthe impact of inland river has the reality urgency.In this paper, through the collection of historical runoff data, meteorological data, studiesthe main pass in the runoff change and different area precipitation, surface water resourcesanalysis in periodic in time, discussing the ground water resources in the space distribution ofthe variation, revealing the evolution characteristics of the quantitative relations; and to theriver Mosuowan irrigation basin groundwater monitoring data as the breakthrough point,research area within human primary active region underground water level changes in timeand space, according to the main agricultural area pumping water and underground waterlevel descending deep relations, analyzes the groundwater dynamic equilibrium relation, anddetermine the stability of the equilibrium of node. The main conclusions are as follows:(1) In recent50years in Manasi River to swat station pass water runoff series, trendvariation significantly, variation for the1995. The main driving forces for the climatewarming caused by glacial melting volume increase. In27years as the runoff of first maincycles, the main2-5cycle in the order of16,20,9and2years.(2)In recent50years, the Manasi River Watershed--Gold River basin the annual averagetemperature of the overall increase evidently, annual precipitation is overall and smooth, theannual runoff of the overall increase evidently, gold river basin climate warming, watershedrunoff increased significantly. With the valley climate warming, the temperature of GoldRiver Annual Runoff contribution rate increased gradually, and the increased precipitation torunoff contribution rate is not.(3) Irrigation groundwater level dynamic by irrigation, evaporation and the exploitation ofcommon control, in which artificial exploitation mainly for irrigation, and the artificial mininghybrid feature. The highest water level appeared in4~May, this period, snow melt water,agricultural irrigation and collection medium, resulting in rising ground water levels, resultingin May4, when the highest level, after6~August, evaporation increased, it is crop needs waterpeak, overexploitation of groundwater, cause subterranean water level to drop continuously, toin September8, the lowest water level, with lateral runoff recharge, groundwater level rise.(4) Mosuowan irrigation area is basically in Gobi with a lower oasis, away from thePiedmont, the groundwater mainly accept lateral runoff supply and irrigation water infiltration.Irrigation area groundwater level years of declining water level for many years, basically reflect the characteristics of dynamic variation of groundwater exploitation in interannualcharacteristics on changing. Through the analysis of irrigation area from1998to2007a seriesof dynamic data of groundwater, groundwater level was significantly affected by irrigationwater use and artificial exploitation quantity control, especially artificial exploitation ofunderground water level changes effect.