標題: Basin-scale groundwater response to precipitation variation and anthropogenic pumping in Chih-Ben watershed, Taiwan
作者: Hsu, Kuo-Chin
Yeh, Hsin-Fu
Chen, You-Cheng
Lee, Cheng-Haw
Wang, Chung-Ho
Chiu, Feng-Sheng
土木工程學系
Department of Civil Engineering
關鍵字: Numerical modeling;Basin-scale groundwater response;Precipitation variation;Anthropogenic pumping;Taiwan
公開日期: 1-May-2012
摘要: The sustainable use of groundwater has become increasingly challenging due to extreme hydrological events and anthropogenic activity. In this study, the basin-scale groundwater response to precipitation variation was analyzed using an integrated model that comprises lumped models for land and river recharges and a distributed model for groundwater. The integrated model was applied to the Chih-Ben watershed, Taiwan, using 20 years (1988-2007) of data. The hydrological data were analyzed for trends using statistical tests. Based on decreasing trends in precipitation and groundwater levels and an increasing trend in stream flow, the oblique-cut method was applied to precipitation and excess infiltration to assess land and streambed recharge. Distributed numerical groundwater modeling was used to simulate the basin-scale groundwater responses to precipitation variation and anthropogenic pumping. The model was calibrated using stable-isotope and groundwater-level data. The safe yields were estimated for the Chih-Ben watershed for dry, wet, and normal precipitation scenarios. The safe yield of groundwater was shown to vary with precipitation, which does not guarantee the sustainable use of groundwater resources. Instead, water resources should be assessed at a basin scale, taking into account the whole ecosystem, rather than only considering water for human consumption in the alluvium.
URI: http://hdl.handle.net/11536/15997
ISSN: 1431-2174
期刊: HYDROGEOLOGY JOURNAL
Volume: 20
Issue: 3
結束頁: 499
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