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GroMoPo Metadata for Grande Glorieuse coral island model

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Created: Feb 07, 2023 at 7:51 p.m.
Last updated: Feb 07, 2023 at 7:52 p.m.
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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.

Subject Keywords



Coordinate System/Geographic Projection:
WGS 84 EPSG:4326
Coordinate Units:
Decimal degrees
Place/Area Name:
North Latitude
East Longitude
South Latitude
West Longitude


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 Link
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
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

GroMoPo, D. Zamrsky (2023). GroMoPo Metadata for Grande Glorieuse coral island model, HydroShare,

This resource is shared under the Creative Commons Attribution CC BY.


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