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GroMoPo Metadata for Guarani Aquifer System model


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Created: Feb 07, 2023 at 2:31 p.m.
Last updated: Feb 07, 2023 at 2:31 p.m.
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Abstract

The Guarani Aquifer System (GAS) is a strategic transboundary aquifer system shared by Brazil, Argentina, Paraguay and Uruguay. This article presents a groundwater flow model to assess the GAS system in terms of regional flow patterns, water balance and overall recharge. Despite the continental dimension of GAS, groundwater recharge is restricted to narrow outcrop zones. An important part is discharged into local watersheds, whereas a minor amount reaches the confined part. A three-dimensional finite element groundwater-flow model of the entire GAS system was constructed to obtain a better understanding of the prevailing flow dynamics and more reliable estimates of groundwater recharge. Our results show that recharge rates effectively contributing to the regional GAS water balance are only approximately 0.6 km(3)/year (about 4.9 mm/year). These rates are much smaller than previous estimates, including of deep recharge approximations commonly used for water resources management. Higher recharge rates were also not compatible with known(81)Kr groundwater age estimates, as well as with calculated residence times using a particle tracking algorithm.

Subject Keywords

Coverage

Spatial

Coordinate System/Geographic Projection:
WGS 84 EPSG:4326
Coordinate Units:
Decimal degrees
Place/Area Name:
Brazil, Argentina, Paraguay, Uruguay
North Latitude
-18.0000°
East Longitude
-47.0000°
South Latitude
-32.0000°
West Longitude
-60.0000°

Content

Additional Metadata

Name Value
DOI 10.3390/w12092323
Depth 1200
Scale 1.2 million km2
Layers 2-5 layers
Purpose groundwater resources;regional flow patterns, water balance and overall recharge
GroMoPo_ID 50
IsVerified True
Model Code Feflow
Model Link https://doi.org/10.3390/w12092323
Model Time steady state flow regime
Model Year 2020
Model Authors R. Gonçalves 1 , E. Teramoto 2, H. Chang 3
Model Country Brazil, Argentina, Paraguay, Uruguay
Data Available report/paper only
Developer Email chang.hung-kiang@unesp.br
Dominant Geology volcanic
Developer Country Brasil
Publication Title Regional Groundwater Modeling of the Guarani Aquifer System
Original Developer No
Additional Information The Guarani Aquifer System (GAS) is a strategic transboundary aquifer system shared by Brazil, Argentina, Paraguay and Uruguay. This article presents a groundwater flow model to assess the GAS system in terms of regional flow patterns, water balance and overall recharge. Despite the continental dimension of GAS, groundwater recharge is restricted to narrow outcrop zones. An important part is discharged into local watersheds, whereas a minor amount reaches the confined part. A three-dimensional finite element groundwater-flow model of the entire GAS system was constructed to obtain a better understanding of the prevailing flow dynamics and more reliable estimates of groundwater recharge. Our results show that recharge rates effectively contributing to the regional GAS water balance are only approximately 0.6 km3/year (about 4.9 mm/year). These rates are much smaller than previous estimates, including of deep recharge approximations commonly used for water resources management. Higher recharge rates were also not compatible with known 81Kr groundwater age estimates, as well as with calculated residence times using a particle tracking algorithm.
Integration or Coupling None of the above
Evaluation or Calibration static water levels
Geologic Data Availability

How to Cite

GroMoPo, D. Serrano (2023). GroMoPo Metadata for Guarani Aquifer System model, HydroShare, http://www.hydroshare.org/resource/4c25ebbb8fdd41f7a5d2a2d2a84ca72b

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

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

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