关键词: 地下水位动态, 地下水流系统, 水文地质结构, 降雨入渗滞后, 地下水资源管理, 江汉平原

Abstract: By identifying the hydrogeological structure of aquifer system, the dynamic characteristics of groundwater level and its influencing factors were analyzed, and then we revealed the temporal and spatial evolution process of groundwater in Jianghan plain. First, we researched the rainfall-runoff relationship and dynamic type of groundwater by partitioning groundwater flow system. Then, we applied mathematical statistics to analyze the relation of cumulative increase of ground water level and cumulative rainfall. The results indicate that the surface water of study area is the discharge area of shallow groundwater except in wet season when surface water of study area recharged groundwater. The general tendency of groundwater level in different aquifers descends as deep pore pressure level, middle pore confined water, shallow pore water. Moreover, the rise of groundwater level lags behind the rainfall infiltration, and the lag time of low stand and high stand are 1-2 days and 5-7 days, respectively. The results have important directions to groundwater resources assessment and management in JiangHan plain.

Key words: groundwater level dynamic characteristics, groundwater flow system, hydrogeologic structure, rainfall infiltration lag effect, groundwater resoures management, Jianghan plain