巴音河冲洪积扇前缘地下水位上升灾害特征及影响因素

Disaster characteristics and influencing factors of groundwater level rise in front edge of the Bayin River alluvial fan

针对柴达木盆地巴音河冲洪积扇前缘地下水位上升,严重影响到该地区百姓日常生活及生命安全的问题,开展了水资源利用现状调查、水文地质补充钻探、水文物探及水土样测试等勘察工作,阐明了研究区地下水位上升的灾害特征,并从水文气象、地形地貌特征、水文地质条件和人类活动等方面,采用层次分析法计算导致地下水上升灾害的各影响因素权重。结果表明,研究区径流量、降水量、引水灌溉和地下水动力条件是地下水位上升的主要因素,4者权重之和为0.7642。

In response to the issue of the rising groundwater level in the front edge of the Bayin River alluvial fan in the Qaidam Basin,which seriously affects the daily life and safety of the people in the area,investigations on the current status of water resource utilization,hydrogeological supplementary drilling,hydrogeological exploration,and soil and water sample testing were conducted and the disaster characteristics of the rising groundwater level in the study area were clarified.The analytic hierarchy process(AHP)was used to study the weights of various influencing factors leading to groundwater rise disasters from the perspectives of hydrological meteorology,terrain and geomorphological characteristics,hydrogeological conditions,and human activities.The results show that the increase in runoff,increase in precipitation of the study area,water diversion irrigation and groundwater dynamic conditions are the main factors contributing to the increase in groundwater level,with a total weight of 0.7642.