额济纳绿洲1992—2015年地下水埋深变化分析

Analysis of Groundwater Depth Change in Ejina Oasis from 1992 to 2015

以黑河下游额济纳绿洲为研究区,基于1992-2015年绿洲东河、西河上、中、下段不同区域地下水埋深观测数据,分析了黑河调水后额济纳绿洲地下水埋深变化特征.结果表明:东河、西河3月、4月地下水埋深最小,8月、9月地下水埋深最大;1992-2003年地下水位以下降为主,1999-2015年大部分区域地下水位呈回升趋势,局部区域地下水变幅不大或轻微下降,通过15a的生态补水,研究区地下水埋深逐步趋于稳定,额济纳绿洲地下水位下降趋势得到很大程度遏制.

Taking Ejina Oasis in the lower reaches of Heihe River as the research area, based on the groundwater depth observation data of different regions in the east branch and west branch of the Oasis from 1992 to 2015, the groundwater depth variation characteristics of Heihe Oasis after the Ecological Dispatching Water were analyzed. The results indicated that the groundwater level of east branch and west branch in March and April is the smallest, and that of August and September is the largest. From 1992 to 2003, the groundwater level decreases main-ly. From 1999 to 2015, the groundwater level in most regions shows a rising trend, while the groundwater level in some regions does not change much or slightly decline. With the deepening of the Ecological Dispatching Water, the groundwater depth in the research area gradual-ly tends to be stable, and after 15 years of the Ecological Dispatching Water, the downward trend of groundwater level in Ejina Oasis has been greatly curbed.