张掖盆地分层地下水动态特征及其影响因素研究

Determination of Groundwater Recharge and Discharge Layer by Stratified Groundwater Monitoring Data-A Case Study of Zhangye Basin

地下水动态变化规律受到河流入渗补给、人工开采、蒸发等诸多因素影响,分析其变化规律对于正确进行地下水资源管理具有重要意义,而分层地下水动态变化规律也能反应区域的补给和开采情况。本文以黑河干流中游地区分层地下水监测孔的监测数据为依据,分析了不同层位地下水动态变化规律,并指出了其水文地质意义。对监测数据的分析结果表明:在补给区,上层水位高于下层水,河水首先补给上层水,对上层水的影响要大于下层;在排泄区,下层水位高于上层水,地下水开采以上层水为主;人类活动对局部地下水流动系统影响比较明显。

The dynamic change of groundwater is affected by many factors such as natural recharge,spring discharge and artificial mining,analysis of dynamic changes of groundwater is of great significance to the proper management of groundwater resources,and the stratified groundwater dynamic change can also reflect the recharge and exploitation of the area.Based on the monitoring data of stratified groundwater monitoring wells in the middle reaches of Heihe River,this paper analyzes the dynamic changes of groundwater in different layers and points out its hydrogeological significance.The research show that the upper groundwater level is higher than the lower groundwater level in recharge area,the Heihe river recharge the upper groundwater so there is more obvious influence to the upper groundwater than the lower groundwater.The lower groundwater level is higher than the upper groundwater level in discharge area,groundwater exploitation mainly focused on the upper groundwater.Human activity has obvious influence on local groundwater flow system.