1.Agricultural University of Inner Mongolia, 010019;2.Hydrology and Engineer geology Centre of Inner Mongolia, 010020;3.Forestry Polytechnic of Inner Mongolia, 010010: Huhhot, China
Abstract：In order to prevent eco-environment of Erjina Oasis from deterioration, the natural conditions of the Erjina Oasis at the lower reaches of Heihe River are introduced and the environmental deterioration problems which are degradation of vegetation and decrease of the water resources and desertification of land in this region in recent years are analyzed . The main causes of the environment degeneration are the decrease of the surface water runoff coming from the lower reaches of Heihe River, the secondary reason is destruction caused by human activities. At last, the administrative measure and thinking of controlling the environmental deterioration in this area of taking coordinated management on water resources all over the river basin and using scientific measure of saving water are pointed out.
2003, Vol. 1 
