塔里木河干流生态保护输水成效分析

Analysis of water transfer effectiveness of ecological protection in the main stream of Tarim River

通过对塔里木河下游开展生态输水,恢复河岸地带地下水环境作用,有效改善了下游生态环境,塔河干流下游距主河道1km处的地下水位,由最初的9.8~10.1m升到2.1~5.3m;地下水矿化度由5.3~7.8g/L下降到1.1~38g/L。塔河下游植被恢复和改善的面积达2285km2,其中,新增植被覆盖面积达362km2,沙地面积减少854km2,植物物种由17种增加到46种,物种多样性指数逐年增加。

By carrying out ecological water conveyance in the lower reaches of the Tarim River to restore the groundwater environment in the riparian zone,the ecological environment in the lower reaches has been effectively improved.The groundwater level in the lower reaches of the main stream of the Tarim River has risen from 9.8 to 10.1 meters to 2.1 to 5.3 meters,and the salinity of groundwater has decreased from 5.3 to 7.8 grams per litre to 1.1 to 3 grams per litre.The area of vegetation restoration and improvement in the lower reaches of the Tahe River is 2285 square kilometers.Among them,362 square kilometers are covered by newly added vegetation,854 square kilometers are reduced in sandy land,and the number of plant species has increased from 17 to 46.The index of species diversity has increased year by year.