Study On Reasonable Allocation Pattern Of Water Resources In Heihe Basin

Heihe is the second biggest inland river in North-west of China, It's downstream is about500km long in the Ejin County. There are national military research base and the Jiuquan satellitelaunch center in there. Ejin Oasis is the natural barrier to prevent the desertification of Juyanhaidelta, also it is very important to native inhabitants, national defense research and frontier defense.Because of unreasonable water resources allocation between environment and socio-economysystem, especially the excessive exploitation of water resources, the original weak eco-environmentof the arid area becomes more and more deteriorated. Not only does this unreasonable waterresources allocation lead to intensifying of series contradictions, but also does harm to nativestability and development. So, the reasonable allocation of water resources is one of the importantstrategies of the development of Heihe Basin. Protection and resume of local eco-environment isnot only beneficial to development of this basin, but also beneficial to the eco-environment qualityof North-west China and North China, which is very important to the ethnic solidarity, societystabilityand national defense steady. In this paper, reasonable allocation of water resources is researched with efficient waterutilization, society and economic development and protection of eco-environment on thebackground of the whole water resources system evolvement and the eco-environment change,which considers the water demand of ecology and reasonably allocate it with the water demand ofnational economy. Problems about local water resources exploitation and water environmentprotection are analyzed and the water demand and supply in the future development are forecastedunder the basin factual conditions. By way of abstraction and generalization, the network of waterresources allocation system is conformed based on the water resources system characteristic and theposition of the hydraulic projects. On the basis of the network, simulation model of water balancebetween demand and supply is designed by means of long series hydrological simulation, and theReasonable Water Resources Allocation Model (RWRAM) is founded by nesting simulation modeland groundwater numeric model each other. According to different ways of water resourcesexploitation, different structures of technologies, different combinations of hydraulic projects anddifferent aims of protecting eco-environment, different programs are planed and simulated by usingRWRAM under the restrictionof State Council Water DistributionPlan about Heihe. By simulating,water balance of demand and supply in different calculating units, regulation of reservoirs, waterflow in river and channels, transformation between surface water and groundwater, process of waterreleasing to downstream are figured out about these programs. These programs are analyzed fromwater resources properties of nature, society, economy and ecology, the reasonable program isrecommended which gives attention to principles of efficiency, justice, systematic etc. and achievesharmonic development between human, eco-environment, society and economy. So, the reasonablewater resources allocation between economic and ecological water demand is realized. On the problems of hydrologic cycle, water and eco-environment, other inland river basins aremore similitude with Heihe. So, the modeling and researching way in Heihe are worthily referredby researchers in other basins with conditions near to Heihe.