DOI: 10.1002/2016GL068888
论文题名: Groundwater recharge mechanisms inferred from isoscapes in a complex tropical mountainous region
作者: Sánchez-Murillo R. ; Birkel C.
刊名: Geophysical Research Letters
ISSN: 0094-9603
EISSN: 1944-9334
出版年: 2016
卷: 43, 期: 10 起始页码: 5060
结束页码: 5069
语种: 英语
英文关键词: groundwater recharge
; isoscapes
; P/GW isotope ratios
; Tropics
; water resources planning tool
Scopus关键词: Evaporation
; Groundwater
; Groundwater flow
; Groundwater resources
; Isotopes
; Precipitation (meteorology)
; Rain
; Surface waters
; Tropics
; Water resources
; Eastern tropical pacific
; Ground water recharge
; Isoscapes
; Isotope ratio
; Moisture transport
; Mountainous regions
; Preferential flows
; Water resources planning
; Recharging (underground waters)
; groundwater
; isotopic ratio
; mountain region
; orographic effect
; oxygen isotope
; preferential flow
; rainfall
; recharge
; separation
; tropical environment
; water planning
; water resource
; Atlantic Ocean
; Caribbean Sea
; Costa Rica
; Pacific Ocean
; Pacific Ocean (Tropical)
英文摘要: Stable isotope variations and groundwater recharge mechanisms remain poorly understood across the tropics, particularly in Central America. Here stable isotopes (δ18O and δ2H) in groundwater, surface water, and rainfall are used to produce high-resolution (100 m2 grid) isoscapes for Costa Rica, from which an isotope ratio of precipitation to groundwater (P/GW) is estimated to elucidate the dominant groundwater recharge processes. Spatially, groundwater and surface water isotope ratios depict the strong orographic separation into the Caribbean and Pacific slopes induced by moisture transport directly from the Caribbean Sea and the eastern tropical Pacific Ocean. P/GW isotope ratios reveal that groundwater recharge is biased toward intensive and more depleted monthly rainfall across the Pacific slope with clear evidence of secondary evaporation indicating slower soil matrix recharge processes. On the other hand, P/GW isotope ratios indicate a weak influence of secondary evaporation across the Caribbean slope suggesting rapid recharge via preferential flow paths. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84971334407&doi=10.1002%2f2016GL068888&partnerID=40&md5=0a0c9d77a9343d7266eb113a43d973fe
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10566
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Stable Isotope Research Group, National University of Costa Rica, Heredia, Costa Rica
Recommended Citation:
Sánchez-Murillo R.,Birkel C.. Groundwater recharge mechanisms inferred from isoscapes in a complex tropical mountainous region[J]. Geophysical Research Letters,2016-01-01,43(10).