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GroMoPo Metadata for Guarani Aquifer Uruguay-Brazil border region model


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Created: Feb 08, 2023 at 2:51 a.m.
Last updated: Feb 08, 2023 at 2:51 a.m.
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Abstract

The cities of Rivera and Santana do Livramento are located on the outcropping area of the sandstone Guarani Aquifer on the Brazil-Uruguay border, where the aquifer is being increasingly exploited. Therefore, recharge estimates are needed to address sustainability. First, a conceptual model of the area was developed. A multilayer, heterogeneous and anisotropic groundwater-flow model was built to validate the conceptual model and to estimate recharge. A field campaign was conducted to collect water samples and monitor water levels used for model calibration. Field data revealed that there exists vertical gradients between confining basalts and underlying sandstones, suggesting basalts could indirectly recharge sandstone in fractured areas. Simulated downward flow between them was a small amount within the global water budget. Calibrated recharge rates over basalts and over outcropping sandstones were 1.3 and 8.1% of mean annual precipitation, respectively. A big portion of sandstone recharge would be drained by streams. The application of a water balance yielded a recharge of 8.5% of average annual precipitation. The numerical model and the water balance yielded similar recharge values consistent with determinations from previous authors in the area and other regions of the aquifer, providing an upper bound for recharge in this transboundary aquifer.

Subject Keywords

Coverage

Spatial

Coordinate System/Geographic Projection:
WGS 84 EPSG:4326
Coordinate Units:
Decimal degrees
Place/Area Name:
Brazil, Uruguay
North Latitude
-30.8000°
East Longitude
-55.4000°
South Latitude
-31.1000°
West Longitude
-55.7000°

Content

Additional Metadata

Name Value
DOI 10.1007/s10040-010-0630-0
Depth 350
Scale 101 - 1 000 km²
Layers 2-5 layers
Purpose Groundwater resources
GroMoPo_ID 141
IsVerified True
Model Code MODFLOW
Model Link https://doi.org/10.1007/s10040-010-0630-0
Model Time SS
Model Year 2010
Model Authors A. Gomez, L. B. Rodríguez, L. S. Vives
Model Country Brazil, Uruguay
Data Available Report/paper only
Developer Email aagomez@fich1.unl.edu.ar
Dominant Geology Model focuses on multiple geologic materials
Developer Country Argentina
Publication Title The Guarani Aquifer System: estimation of recharge along the Uruguay-Brazil border
Original Developer No
Additional Information The cities of Rivera and Santana do Livramento are located on the outcropping area of the sandstone Guarani Aquifer on the Brazil–Uruguay border, where the aquifer is being increasingly exploited. Therefore, recharge estimates are needed to address sustainability. First, a conceptual model of the area was developed. A multilayer, heterogeneous and anisotropic groundwater-flow model was built to validate the conceptual model and to estimate recharge. A field campaign was conducted to collect water samples and monitor water levels used for model calibration. Field data revealed that there exists vertical gradients between confining basalts and underlying sandstones, suggesting basalts could indirectly recharge sandstone in fractured areas. Simulated downward flow between them was a small amount within the global water budget. Calibrated recharge rates over basalts and over outcropping sandstones were 1.3 and 8.1% of mean annual precipitation, respectively. A big portion of sandstone recharge would be drained by streams. The application of a water balance yielded a recharge of 8.5% of average annual precipitation. The numerical model and the water balance yielded similar recharge values consistent with determinations from previous authors in the area and other regions of the aquifer, providing an upper bound for recharge in this transboundary aquifer.
Integration or Coupling
Evaluation or Calibration Static water levels
Geologic Data Availability

How to Cite

GroMoPo, S. Ruzzante (2023). GroMoPo Metadata for Guarani Aquifer Uruguay-Brazil border region model, HydroShare, http://www.hydroshare.org/resource/7a2470dffc9d4ccdaecc9789a45fe23a

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

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

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