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| Type: | Resource | |
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| Created: | Feb 07, 2023 at 7:51 p.m. | |
| Last updated: | Feb 07, 2023 at 7:52 p.m. | |
| Citation: | See how to cite this resource |
| Sharing Status: | Public |
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| Views: | 596 |
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Abstract
In coral islands, groundwater is a crucial freshwater resource for terrestrial life, including human water supply. Response of the freshwater lens to expected climate changes and subsequent vegetation alterations is quantified for Grande Glorieuse, a low-lying coral island in the Western Indian Ocean. Distributed models of recharge, evapotranspiration and saltwater phytotoxicity are integrated into a variable-density groundwater model to simulate the evolution of groundwater salinity. Model results are assessed against field observations including groundwater and geophysical measurements. Simulations show the major control currently exerted by the vegetation with regards to the lens morphology and the high sensitivity of the lens to climate alterations, impacting both quantity and salinity. Long-term changes in mean sea level and climatic conditions (rainfall and evapotranspiration) are predicted to be responsible for an average increase in salinity approaching 140 % (+8 kg m(-3)) when combined. In low-lying areas with high vegetation density, these changes top +300 % (+10 kg m(-3)). However, due to salinity increase and its phytotoxicity, it is shown that a corollary drop in vegetation activity can buffer the alteration of fresh groundwater. This illustrates the importance of accounting for vegetation dynamics to study groundwater in coral islands.
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Additional Metadata
| Name | Value |
|---|---|
| DOI | 10.1007/s10040-014-1160-y |
| Depth | 100 |
| Scale | 11 - 101 km² |
| Layers | 16-20 layers |
| Purpose | Groundwater resources;Climate change;Salt water intrusion;Sea-level rise scenarios |
| GroMoPo_ID | 114 |
| IsVerified | True |
| Model Code | MODFLOW;SEAWAT |
| Model Link | https://doi.org/10.1007/s10040-014-1160-y |
| Model Time | SS |
| Model Year | 2014 |
| Model Authors | JC. Comte, JL. Join, O. Banton, E. Nicolini |
| Model Country | France |
| Data Available | Report/paper only |
| Developer Email | j.comte@qub.ac.uk |
| Dominant Geology | Unconsolidated sediments |
| Developer Country | UK |
| Publication Title | Modelling the response of fresh groundwater to climate and vegetation changes in coral islands |
| Original Developer | No |
| Additional Information | |
| Integration or Coupling | Solute transport |
| Evaluation or Calibration | Dynamic water levels |
| Geologic Data Availability |
How to Cite
This resource is shared under the Creative Commons Attribution CC BY.
http://creativecommons.org/licenses/by/4.0/
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