关键词: 黑河下游, 额济纳绿洲, 环境退化, 水资源

Abstract: Ejin oasis located in the lower reaches of Heihe river is a main natural oasis in Alxa Plateau western to Inner Mongolia- There is continuous degradation of eco-environment in the latest half century especially in the last decade because of the effects of unreasonable human activities and harmful natural factors. It has been seriously affecting the sustainable development of this area and nearby regions. Through analysing the present situations and reasons of environment changes, it was suggested that environment protection must be centred on the water problems to popularize water-efficient agriculture in the middle reaches of Heihe river for saving certain water flowing into the lower reaches. Meanwhile, the unreasonable human activities must be controlled so as to realize the favorable cycling of ecoenvironment in 10~15 years.

Key words: The lower reaches of Heihe river, Ejin oasis, Eco-environmental degradation, Water resources