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摘要: 地下水可更新能力是评价地下水开发可持续性的关键指标，可更新能力可以用地下水年龄来定量表达。在人类活动影响下，地下水的实际更新状况已与自然条件下截然不同。基于台兰河流域地下水库建设和人工回灌工作现状，通过物理试验和数值模拟相结合的方法分别研究了入渗池位置，回灌强度和包气带厚度对地下水年龄分布规律的影响。结果表明：人工回灌使地下水年龄整体变年轻；入渗池位置和回灌强度的改变对地下水年龄分布的影响显著；包气带厚度的增大使回灌水滞留时间延长，导致地下水年龄增大，该研究可为合理评价区域地下水可更新能力提供技术指导。Abstract: Groundwater renewable capacity is a key indicator of the sustainability of groundwater development, and renewable capacity can be expressed quantitatively by groundwater age. Under the influence of human activities, the actual status of groundwater is quite different from that under natural conditions. Based on the status of underground reservoir construction and artificial recharge in the Tailan River Basin, the influence of infiltration basin location, recharge intensity and thickness of the unsaturated zone on the distribution of groundwater age is examined with the physical experiment and numerical simulation. The results show that the artificial recharge has reduced the regional mean groundwater age. The change of infiltration basin location and recharge intensity has a significant effect on the distribution of groundwater age. Increase of the thickness of the unsaturated zone increases the residence time of the recharge water and the mean age of the groundwater. This study can provide technical guidance for rational evaluation of the regional groundwater renewability capacity.
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Key words:
- groundwater reservoir /
- artificial recharge /
- groundwater age /
- groundwater renewal
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