关键词: 塔里木河下游, 应急输水, 地表植被, 生态响应

Abstract: The lower reach of Tarim River is from Qiara to Taitema Lake and with about 428 km in length, it was also called "Green corridor". Since 1970s, the watercourse from Daxihaizi Reservoir has dried up. Consequently, the vegetation mainly live on groundwater in this region almost dies out. The Green corridor shrank sharply and tends to ruin. Urgently, ecological water input was taken in 2000\_2001, which has brought obvious effect on vegetation recover. The average uplift of water level was 5~6 m near the runway, and the influencing scope reached 1 000 m away from watercourse. These have relation to the continual time and the quantity of water transportation. Along with the uplifting of groundwater table, the vegetation condition in lower reaches area has improved. At transverse section of river, the sensitive influenced range of Phragmites communis is about 100~150 m, and that of Populus euphratica is about 200~250 m;Along the river, the average number of leaves on little branch increased by 57%, 22.2% and 9.2% respectively from upper section to lower section when comparing with the end section.

Key words: the lower reaches of Tarim River, water input, vegetation, ecological response