新疆塔里木河下游应急输水植被阶段恢复分析

Vegetation restoration after emergent water conveyance to lower reach of Tarim River.

根据塔里木河下游第4次应急输水后不同断面、不同离河距离植被生长调查数据,分析塔里木河下游输水河道两侧不同地下水埋深梯度地表相应植物的生态恢复指征,结果表明,经4次应急输水后胡杨萌蘖更新发生在离河150m且地下水埋深<4m的条件下,研究确定了植被种类、长势与离河距离和地下水埋深之间的量化关系以及植被恢复等级与离河距离的量化关系,为应急输水后生态恢复范围的确定和输水方案的调整提供科学依据。

Based on the vegetation survey on different cross section at different distance from Tarim River after the fourth emergent water conveyance to the lower reach of the River, this paper analyzed the relationships between the underground water depth on the both sides of the lower reach of Tarim River and the ecological restoration of vegetation, The results showed that after the fourth emergent water conveyance, the regenera- tion of Populus euphratica occurred at the places about 150 m away from the fiver, with a groundwater depth 〈4 m. A quantitative relationship was found between vegetation recovery, species composition and growth status, distance from the fiver, and underground water depth, which supplied a scientific basis for determining the ecological restoration range and the adjustment of water conveyance scheme after emergent water conveyance to the lower reach of Tarim fiver.