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GroMoPo Metadata for NE Tunisia Saltwater Intrusion model
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Created: Apr 13, 2023 at 2:04 p.m.
Last updated: Apr 13, 2023 at 2:05 p.m.
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Abstract

In overexploited coastal aquifers threatened or affected by saline intrusion, managed aquifer recharge (MAR) is increasingly applied in the aim of maintaining or recovering freshwater quantity and quality. The long-term regional-scale effectiveness of MAR, however, lacks field examples. The Korba coastal aquifer (Tunisia) has been increasingly overexploited since the 1960s and intensively studied over the last few decades. Groundwater abstraction has resulted in a decline of groundwater levels and a dramatic increase in salinity through both lateral seawater intrusion and shallow salinization from irrigation. MAR strategies, including freshwater injection wells and sewage-water infiltration basins, have been progressively implemented since 1990. Using 50 years of groundwater head and salinity records, a regional three-dimensional numerical groundwater model is calibrated to study the spatiotemporal dynamics of groundwater salinization including the past and future impact of the MAR operations. Results suggest that lateral seawater intrusion from the coast and shallow infiltration of evapoconcentrated saline irrigation water are the two interlinked dominant regional processes of groundwater salinization, equivalent in magnitude. In accordance with the groundwater observations, simulated historical MAR operations are shown to have contributed to slowdown and stabilized the regional salinization, which contrasts with the steady rise that is obtained in the hypothetical absence of MAR. The future MAR simulation scenarios suggest that spatial management of irrigation supplies and injection points from dam freshwater has a potential for further reducing the salinization of shallow groundwater and potentially reversing the inland progression of the seawater front. Further works should look at reconciling modelling recommendations with management practice options.

Subject Keywords

Coverage

Spatial

Coordinate System/Geographic Projection:
WGS 84 EPSG:4326
Coordinate Units:
Decimal degrees
Place/Area Name:
Tunisia
North Latitude
36.8000°
East Longitude
10.9000°
South Latitude
36.6000°
West Longitude
10.8000°

Content

Additional Metadata

Name Value
DOI 10.2112/JCOASTRES-D-17-00174.1
Depth 210 meters
Scale 101 - 1 000 km²
Layers 21
Purpose Salt water intrusion
GroMoPo_ID 2018
IsVerified True
Model Code SEAWAT
Model Link https://doi.org/10.2112/JCOASTRES-D-17-00174.1
Model Time 1961 - 2014
Model Year 2019
Creator Email sachawruzzante@gmail.com
Model Country Tunisia
Data Available Report/paper only
Developer Email sarabachtouli@yahoo.fr
Dominant Geology Unconsolidated sediments
Developer Country Tunisia; Scotland
Publication Title Regional-Scale Analysis of the Effect of Managed Aquifer Recharge on Saltwater Intrusion in Irrigated Coastal Aquifers: Long-Term Groundwater Observations and Model Simulations in NE Tunisia
Original Developer No
Additional Information N/A
Integration or Coupling Solute transport
Evaluation or Calibration Dynamic water levels, Groundwater chemistry
Geologic Data Availability No

How to Cite

GroMoPo, S. Ruzzante (2023). GroMoPo Metadata for NE Tunisia Saltwater Intrusion model, HydroShare, http://www.hydroshare.org/resource/12fa56fc0d524bb98c7e4cb459743a59

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

 http://creativecommons.org/licenses/by/4.0/
CC-BY

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