Cited by 34Groundwater flow and contamination studiesGroundwater and Isotope GeochemistryKarst Systems and Hydrogeology

Theoretical head decay in closed basin aquifers: an insight into fossil groundwater and recharge events in the Andes of northern Chile

Houston, John, Hart, Dan·2004·Quarterly Journal of Engineering Geology and Hydrogeology

Abstract

Many small to moderate-sized, closed aquifer basins in northern Chile show a groundwater gradient indicating flow despite an apparent lack of recharge under current climatic conditions. An examination of the mechanisms that might produce such flow suggests that the only realistic possibility is head decay from an earlier higher water level caused by ancient recharge. Model studies suggest that for small basins, such recharge must have taken place within the last 1000 years and possibly within the last few hundred years, calling into question whether such resources should be labelled fossil. Recent palaeoclimatic studies of northern Chile show several pluvial periods throughout the Late Pleistocene and Holocene, inaddition to long return period storm events, which continue to the present and which might have led to a series of pulsed flushing events in aquifers. Hence, it is incorrect to label groundwater resources as either fossil or actively recharged, as there is, in reality, a continuum between the two, and all such aquifers require site-specific evaluation and new, more flexible guidelines for development.

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Crossref · 10.1144/1470-9236/04-007

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Authors
Houston, J., & Hart, D.
Affiliations
Avda. Las Condes 10373, Of. 60, Las Condes, Santiago, Chile (e-mail: houston@entelchile.net)
Venue
Quarterly Journal of Engineering Geology and Hydrogeology
Published
2004-05
Volume
37
Issue
2
Pages
131-139
ISSN
  • 1470-9236 (ISSN-L)
  • 2041-4803
OpenAlex
W2067493521
Cited by
34
References
29
Citations by year
2025: 1 · 2022: 4 · 2021: 6 · 2020: 4 · 2019: 1 · 2018: 4 · 2017: 1 · 2016: 2 · 2015: 2 · 2013: 1 · 2012: 4
FWCI
1.36
Type
journal article
Language
en
Open access
closed
Locations
Quarterly Journal of Engineering Geology and Hydrogeology (publishedVersion)
Topics
  • Physical Sciences › Environmental Science › Environmental Engineering › Groundwater flow and contamination studies
  • Physical Sciences › Earth and Planetary Sciences › Geochemistry and Petrology › Groundwater and Isotope Geochemistry
  • Physical Sciences › Earth and Planetary Sciences › Earth-Surface Processes › Karst Systems and Hydrogeology
Keywords
fossil groundwater, groundwater recharge, groundwater flow, Late Pleistocene, storms, groundwater age

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