黑河下游额济纳河流域生态环境现状及发展趋势

本文通过资料和监测数据阐述了2006—2011年黑河下游额济纳河流域生态环境现状及其变化趋势。土地覆盖监测数据结果表明，截至2011年额济纳河流域绿洲面积达3232km^2，水域湿地面积达118km^2，额济纳绿洲植被覆盖度总体呈增加趋势，局部地区增加显著，而个别地区植被呈缓慢退化。水资源调查数据说明。额济纳河流域绿洲的维持和恢复仍取决于黑河水的补给量，近几年黑河水在额济纳境内的进入量基本能维持额济纳现有绿洲规模。

Current ecological status and its trend of the Ejin River of the downstream Hei He River

Based on literatures and monitoring data, we studied current status and its trend of ecological environments in the Ejin River during 2006 and 2011. Land cover data suggest that oasis area of the Ejin River is up to 3232 km^2 to 2011, wetland area along the river is 118 km^2. Vegetation cover of oasis in the Ejin is increasing in general, this trend is remarkable in a few restricted locations, but it is decreasing slowly in a few other locations. Monitoring data of water resources indicate that maintenance and recovery of oasis in the Ejin River depend on supplementary amount of water from the Hei He River, and current amounts of river flow of the Hei He River in the Ejin River can maintain the current oasis in the Ejin.