中文摘要：

从循环、更新和再生的基本定义出发，论述了地下水运动在全球水循环过程中的重要作用及地下水更新能力和再生能力的含义，指出“地下水循环”这一说法存在一定不足；提出地下水更新能力和再生能力是含水层系统的自然属性，地下水在含水层系统中更新和再生同时发生．地下水从含水层系统的界面补给与排泄，通过界面与其他系统发生水量交换，地下水在含水层中更替的多寡不影响含水层系统的更新能力；地下水在含水层中更新的过程中，同时发生自然作用（物理、化学和生物作用等）和人为作用（地下水污染控制与修复），其结果反映出含水层系统的再生能力，该过程受水文地球化学条件影响较大，水位变动带内尤甚，含水层系统的地下水再生能力比更新能力的影响因素要复杂得多．

英文摘要：

This paper discusses connotation of groundwater renewal capacity and reproducibility as well as function of groundwater movement in the global water cycle, and questioned the accuracy of ＂groundwater cycle＂. It is proposed that renewable capacity and reproducibility of groundwater is a kind of natural attribute and intrinsic characteristics of aquifer system. Groundwater is replenished and discharged through outer boundaries, and interacts with surface water, soil and atmosphere system by water transfer. Groundwater quantity in aquifer system does not influence renewable capacity. During groundwater renewal, groundwater is impacted by both natural environment and human activities. The final status of groundwater quality reflects the reproducibility of aquifer system, which is influenced mostly by the hydro-geochemical conditions, especially after serious changes in groundwater level. Factors affecting groundwater reproducibility are more complex than those affecting renewable capacity.