塔里木河下游地下水位对生态输水的响应

Response of Groundwater Level to the Ecological Water Conveyance in the Lower Reaches of the Tarim River

以塔里木河下游第12次生态输水为契机,监测输水前后及输水过程中的地下水位动态变化,分析地下水位随时间的变化规律,以及垂直于河道不同距离处的地下水位变化差异。研究表明:距离输水河道越近,地下水位抬升量越大;越靠近下游上段抬升幅度越大。个别断面受河道是否过水及输水量的影响略有差异。进一步分析了输水量与地下水位抬升量的关系,从而使人们从一个侧面再次了解到塔里木河流域近期综合治理规划实施的效果。

In this study, the dynamic change of groundwater level before, after and during the 12th ecological water conveyance to the lower reaches of the Tarim River in Xinjiang, China was researched, the temporal and spa- tial change of groundwater level was analyzed, and the relationship between groundwater level change and distance of monitoring wells away from the river channel was lucubrated. The results show that the raise extent of groundwa- ter level was increased upstream and with the decrease of distance away from the ricer channel, and it was affected by that whether the place was flooded by conveyed water and by conveyed water volume. The analyzed result of the relationship between conveyed water volume and raise extent of groundwater level is of significance for understand- ing the recent effect of ecological water conveyance on groundwater level raise in the lower reaches of the Tarim Riv- er. It is considered that the long-term and stable ecological water conveyance is very important for the growth of nat- ural vegetation and the ecological regeneration in the lower reaches of the Tarim River.