由于人类活动的累计影响,地下水脆弱性不仅在空间上变化,在时间上也发生变化。本文从三个阶段对滹沱河流域地下水脆弱性进行了评价,证明了地下水脆弱性随时间的变化,并分析了其演化趋势和演化特征以及演变机理。结果表明:由于地下水的长期大量开采,使地下水脆弱性影响因素(如,地下水位埋深、包气带厚度和降雨入渗系数等)发生了变化,而使地下水脆弱性发生变化。 Due to the cumulative effects of human activities, groundwater vulnerability not only varies in space but also in time. This paper evaluates the vulnerability of groundwater in Hutuo River Basin from three stages, and proves the change of groundwater vulnerability with time, and analyzes its evolution trend, evolution characteristics and evolution mechanism. The results show that the vulnerability of groundwater changes due to the change of groundwater vulnerability factors (such as the depth of groundwater table, the thickness of aeration zone and the rainfall infiltration coefficient) due to long-term large-scale exploitation of groundwater.