塔里木沙漠公路防护林工程抽水的地下水位响应

Responses of Ground Water Level to Pumping Water of the Tarim Desert Highway Shelterbelt Project

为了掌握塔克拉玛干沙漠腹地单井抽水过程中,地下水位的变化过程,为沙漠生态防护林工程可持续供水提供理论依据。通过设置在塔里木沙漠公路防护林生态工程灌溉用第69号水源井处的观测场,观测了一次抽水过程,2个抽水应力期内,观测井中的水位变化情况,确定了研究区域的几个水文地质参数,分析了抽水过程水位变化规律。研究显示:计算所得渗透系数K=13.32m/d;抽水影响半径R=332.04m;给水度μ=5.08%。在2个抽水应力期内,水位急速下降和急速上升过程均可在其开始后的11min内完成,之后转为缓慢变化阶段。停止抽水后,水位可以恢复到未抽水之前的水平,没有引起天然地下水位的持续下降。

In order to clarify the change process of groundwater level in process of single wells withdrawing water in the hinterland of Taklimakan desert,and providing theoretical basis for sustainable water supply,the change of water level was observed in the pumping process at Tarim Desert Highway Shelter-forest Ecological Project No.69 well.Using these experimental data,several hydrogeological parameters of aquifer were determined by empirical Formula.The Law of Temporal and Spatial Variation in the process of pumping water can be demonstrated by experimental data analysis.The result shows that：The calculated permeability coefficient was 13.32 m,influenced radius was 332.04 m,and specific yield was 5.08%.In the two stress periods of pumping water,groundwater level of rapid decline and rapid rise can be completed at the beginning of its 11 minutes during Pumping.Groundwater level changes to the slow phase after 11 minutes.The water level could be restored to the level before pumping,and,the continuous decline of the natural underground water level was not found.