Journal Article10.1007/S10040-020-02300-0
An analytical methodology to estimate the changes in fresh groundwater resources with sea-level rise and coastal erosion in strip-island unconfined aquifers: illustration with Savary Island, Canada
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TL;DR: In this paper, the authors focused on the case of strip oceanic islands when three combined effects of climate change are observed to affect the freshwater lens volume and its groundwater resource renewal: sea-level rise, erosion and change in groundwater recharge rates.
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Abstract: Closed-form analytical solutions for assessing the consequences of climate change on fresh groundwater oceanic island lenses have been developed by hydrogeologists during the last decade. Based on existing equations, this study focuses on the case of strip oceanic islands when three combined effects of climate change are observed to affect the freshwater lens volume and its groundwater resource renewal: sea-level rise, erosion, and change in groundwater recharge rates. New equations, integrating these combined effects of climate change on fresh groundwater resources are provided. These equations are solved by a novel methodology based on a Dupuit-Forchheimer groundwater flow model that allows for determination of the hydrogeological parameters included in the equations. The approach is illustrated with the strip island of Savary, which is located along the Pacific Coast of Canada in the province of British Columbia. This example illustrates, on the one hand, the volume depletion of the island freshwater lens and, on the other hand, the decrease of the renewal rate of groundwater. The proposed approach can be applied to any strip islands worldwide to assess the cumulative effects of sea-level rise and shore erosion on groundwater resources, depending on the predicted climate change scenarios. The results can then help decision-makers to anticipate the effects of climate change on the groundwater availability in strip oceanic islands and plan future groundwater use accordingly.
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Citations
Impacto del cambio climático en las lentes de agua dulce de las islas de barrera y sus zonas de transición: un estudio multiparamétrico
Lena Thissen,Janek Greskowiak,Lidia Gaslikova,Gudrun Massmann +3 more
TL;DR: Climate change affects freshwater lenses and their transition zones on barrier islands. Sea-level rise and groundwater recharge influence freshwater volume and transition zone thickness. Model predictions show a decrease in freshwater lens volume and depth and an increase in transition zone thickness.
Laboratory-scale study of mixed barriers in stratified layers with an inclined ocean aquifer boundary
Vikas Kumar Sharma,Sumedha Chakma +1 more
TL;DR: This laboratory study investigates mixed barriers in stratified layers with an inclined ocean aquifer boundary, exploring the effects of low-permeability obstacles and preferred flow routes on seawater intrusion in shoreline aquifers under diverse extraction conditions.
Comment on sp-2023-38
Claudia Romagnoli
- 31 Jan 2024
TL;DR: Sea level rise impacts Europe with flooding, erosion and saltwater intrusion leading to damage to assets, environment and people.
Tourism-Related Pressure on the Freshwater Lens of the Small Coral Island Gili Air, Indonesia
Jarrid M. P. Tschaikowski,Doni P. E. Putra,Atas Pracoyo,Nils Moosdorf +3 more
TL;DR: Gili Air has a well-developed freshwater lens with sufficient water volume and high recharge rate. However, unsustainable water withdrawals due to increased tourism have led to concerns about seawater intrusion.
Reply on RC2
Roderik van de Wal
- 03 Apr 2024
TL;DR: Sea level rise impacts Europe with flooding, erosion and saltwater intrusion leading to damage to assets, environment and people.
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Numerical modelling of climate change impacts on freshwater lenses on the North Sea Island of Borkum using hydrological and geophysical methods
H. Sulzbacher,Helga Wiederhold,Bernhard Siemon,M. Grinat,Jan Igel,Thomas Burschil,Thomas Günther,Klaus Hinsby +7 more
TL;DR: In this article, a numerical, density dependent groundwater model is set up for the North Sea Island of Borkum to estimate climate change impacts on coastal aquifers and especially the situation of barrier islands in the Wadden Sea.