Transient change in groundwate
- journal_title：Geology
- Contributor：Chi-yuen Wang ; Michael Manga ; Chung-Ho Wang ; Chieh-Hung Chen
- Publisher：Geological Society of America
- Date：2012-
- Format：text/html
- Language：en
- Identifier：10.1130/G32565.1
- journal_abbrev：Geology
- issn：0091-7613
- volume：40
- issue：2
- firstpage：119
- section：Articles
摘要
Postseismic decrease in groundwater temperature was documented on the upper rim of a large alluvial fan near the epicenter of the 1999 Mw 7.5 Chi-Chi earthquake (Taiwan). We use a model of coupled heat transport and groundwater flow, constrained by documented water-level changes, to interpret this change. We show that groundwater temperature is sensitive to earthquake-induced flow and the observed temperature decrease may be explained by increased groundwater discharge due to earthquake-enhanced vertical permeability. The result implies that heat flow near active mountain fronts may be lowered by recurrent earthquakes.