The influence of heterogeneity on coastal groundwater flow - physical and numerical modeling of fringing reefs, dykes and structured conductivity fields

The influence of heterogeneity on coastal groundwater flow - physical and numerical modeling of... •Heterogeneity strongly influences coastal groundwater flow.•Physical and numerical models were done for discrete (Dykes, fringing reef) and spatially distributed heterogeneity.•Dykes lead to compartmentalization of aquifer and preserve saline water on the landward side for longer periods of time.•Fringing reefs lead to bimodal freshwater flow to the ocean, (a) at the beach face, (b) in submarine springs at the reef bottom. This play a major role for nutrient transport into coastal ecosystems. Bimodal flow confirmed by field data.•For structured conductivity fields, longer aquifer compartments lead to a higher resulting hydraulic conductivity and a movement of the wedge toe further inland. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Advances in Water Resources Elsevier

The influence of heterogeneity on coastal groundwater flow - physical and numerical modeling of fringing reefs, dykes and structured conductivity fields

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Publisher
Elsevier
Copyright
Copyright © 2017 Elsevier Ltd
ISSN
0309-1708
eISSN
1872-9657
D.O.I.
10.1016/j.advwatres.2017.11.024
Publisher site
See Article on Publisher Site

Abstract

•Heterogeneity strongly influences coastal groundwater flow.•Physical and numerical models were done for discrete (Dykes, fringing reef) and spatially distributed heterogeneity.•Dykes lead to compartmentalization of aquifer and preserve saline water on the landward side for longer periods of time.•Fringing reefs lead to bimodal freshwater flow to the ocean, (a) at the beach face, (b) in submarine springs at the reef bottom. This play a major role for nutrient transport into coastal ecosystems. Bimodal flow confirmed by field data.•For structured conductivity fields, longer aquifer compartments lead to a higher resulting hydraulic conductivity and a movement of the wedge toe further inland.

Journal

Advances in Water ResourcesElsevier

Published: Mar 1, 2018

References

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