Water exchange, mixing and transient storage between a saturated karstic conduit and the surrounding aquifer: Groundwater flow modeling and inputs from stable water isotopes

详细信息    查看全文

• 作者：S. Binet^a ; ^c ; ^{stephane.binet@univ-orleans.fr} ; E. Joigneaux^a ; ^b ; H. Pauwels^b ; P. Albé ; ric^a ; Ch. Flé ; hoc^b ; A. Bruand^a
• 关键词：Karst hydrology ; Stable isotopes ; Water exchanges ; Saturated conduit ; Coupled flow model
• 刊名：Journal of Hydrology
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：544
• 期：Complete
• 页码：278-289
• 全文大小：1777 K
• 卷排序：544

文摘

Water exchanges between karstic conduit and aquifer are driven by pressure gradient. Isotopic signature determination and water head measurements were conducted on a karstic aquifer. Exchanges from aquifer water to conduit take place even in pseudo-steady state conditions. The model evidences steady-state exchanges evolving from recharge to discharge areas. With floods, these exchanges fluctuate around the equilibrium and create an underground hyporheic zone.