Representing Glaciations and Subglacial Processes in Hydrogeological Models: A Numerical Investigation
Joint Authors
Sterckx, Arnaud
Lemieux, Jean-Michel
Vaikmäe, Rein
Source
Issue
Vol. 2017, Issue 2017 (31 Dec. 2017), pp.1-12, 12 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2017-04-04
Country of Publication
Egypt
No. of Pages
12
Main Subjects
Abstract EN
The specific impact of glacial processes on groundwater flow and solute transport under ice-sheets was determined by means of numerical simulations.
Groundwater flow and the transport of δ18O, TDS, and groundwater age were simulated in a generic sedimentary basin during a single glacial event followed by a postglacial period.
Results show that simulating subglacial recharge with a fixed flux boundary condition is relevant only for small fluxes, which could be the case under partially wet-based ice-sheets.
Glacial loading decreases overpressures, which appear only in thick and low hydraulic diffusivity layers.
If subglacial recharge is low, glacial loading can lead to underpressures after the retreat of the ice-sheet.
Isostasy reduces considerably the infiltration of meltwater and the groundwater flow rates.
Below permafrost, groundwater flow is reduced under the ice-sheet but is enhanced beyond the ice-sheet front.
Accounting for salinity-dependent density reduces the infiltration of meltwater at depth.
This study shows that each glacial process is potentially relevant in models of subglacial groundwater flow and solute transport.
It provides a good basis for building and interpreting such models in the future.
American Psychological Association (APA)
Sterckx, Arnaud& Lemieux, Jean-Michel& Vaikmäe, Rein. 2017. Representing Glaciations and Subglacial Processes in Hydrogeological Models: A Numerical Investigation. Geofluids،Vol. 2017, no. 2017, pp.1-12.
https://search.emarefa.net/detail/BIM-1155586
Modern Language Association (MLA)
Sterckx, Arnaud…[et al.]. Representing Glaciations and Subglacial Processes in Hydrogeological Models: A Numerical Investigation. Geofluids No. 2017 (2017), pp.1-12.
https://search.emarefa.net/detail/BIM-1155586
American Medical Association (AMA)
Sterckx, Arnaud& Lemieux, Jean-Michel& Vaikmäe, Rein. Representing Glaciations and Subglacial Processes in Hydrogeological Models: A Numerical Investigation. Geofluids. 2017. Vol. 2017, no. 2017, pp.1-12.
https://search.emarefa.net/detail/BIM-1155586
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1155586