Study on eco-environmental water use of soil and water conservation in loess plateau

From the point of view of realizing the sustainable socio economic development in loess plateau,this paper discusses the def init ion of the eco-environmental water demand and the framework for computing eco-environmental water demand in loess plateau,aiming at sustainable development of eco-environment.Taking Jinghe river basin in loess plateau as an example,the average yearly ecological water ewquirement for soil conservation measures is estmated as 6.5368×10⁸m³ in 1970-1996.The research not only enriches the theory of the eco-environmental water demand,but also provides a scientific basis for the eco-environmental construction and the exploitation and utilization of water resources.