季節性集水區動態儲水特性評估

動態儲水量為對於外在因素（如氣候與人為活動）較為敏感的地下水儲存量，其扮演著維持生態與人類用水以及減緩環境變遷影響的重要角色，但動態儲水量實際可能由貢獻河川、蒸發散或其他地下水損失的水文分量所組成。因此，本研究透過流量延時曲線解析模型與水平衡方法推估季節性消退特徵與動態儲水量，探討動態儲水組成與模型對於集水區尺度之適用性。結果說明消退特徵的季節性差異與動態儲水通過的含水層以及流域特徵有關。動態儲水組成則顯示乾濕季額外地下水儲存的明顯差異，本研究成果可作為水文模擬與預測及未來水資源管理決策所參考。

關鍵字

動態儲水量；乾濕季；流量延時曲線；水平衡

並列摘要

Dynamic storage is the part of groundwater storage that is more sensitive to the external factors (e.g. climate change, human activities). It plays a critical role on maintaining the ecological habitat and human water use and mediating the hydrological impact from environmental change. Previous studies have widely explored the storage-discharge relationship through the simple water balance, applying to estimate the groundwater storage at the catchment or basin scale. However, the dynamic storage consists not only streamflow generation but also evapotranspiration, and other possible paths for groundwater loss. Therefore, the aim of this study is using the flow duration curve model to estimate the seasonal recession characteristics and direct storages which represent the aquifer discharge contribute to river, understanding the model applicability to the catchment scale. We then combine the water balance method to estimate the indirect storage which is insensitive to streamflow, exploring the seasonal dynamic storage components. The results showed that the seasonal difference in the recession characteristics is related to the aquifer range that the dynamic storage passes through and the catchment characteristics. The dynamic storage components show a significant difference in additional groundwater storage between the dry and wet seasons. These results can be used as a reference for hydrological simulation and prediction, and future water resources management.

並列關鍵字

dynamic storage ； dry and wet seasons ； flow duration curve ； water balance

國際替代計量

季節性集水區動態儲水特性評估

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