GroMoPo Metadata for Pampa del Tamarugal 2016 regional model

Authors:

GroMoPo Sacha Ruzzante

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gromopo_admin

Type:

Resource

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The size of this resource is 3.2 KB

Created:

Feb 07, 2023 at 7:57 p.m.

Last updated:

Feb 07, 2023 at 7:57 p.m.

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Abstract

Aquifers within the Pampa del Tamarugal Basin (Atacama Desert, northern Chile) are the sole source of water for the coastal city of Iquique and the economically important mining industry. Despite this, the regional groundwater system remains poorly understood. Although it is widely accepted that aquifer recharge originates as precipitation in the Altiplano and Andean Cordillera to the east, there remains debate on whether recharge is driven primarily by near-surface groundwater flow in response to periodic flood events or by basal groundwater flux through deep-seated basin fractures. In addressing this debate, the present study quantifies spatial and temporal variability in regional-scale groundwater flow paths at 20.5A degrees S latitude by combining a two-dimensional model of groundwater and heat flow with field observations and delta O-18 isotope values in surface water and groundwater. Results suggest that both previously proposed aquifer recharge mechanisms are likely influencing aquifers within the Pampa del Tamarugal Basin; however, each mechanism is operating on different spatial and temporal scales. Storm-driven flood events in the Altiplano readily transmit groundwater to the eastern Pampa del Tamarugal Basin through near-surface groundwater flow on short time scales, e.g., 10(0)-10(1) years, but these effects are likely isolated to aquifers in the eastern third of the basin. In addition, this study illustrates a physical mechanism for groundwater originating in the eastern highlands to recharge aquifers and salars in the western Pampa del Tamarugal Basin over timescales of 10(4)-10(5) years.

Subject Keywords

Coverage

Spatial

Coordinate System/Geographic Projection:

WGS 84 EPSG:4326

Coordinate Units:

Decimal degrees

Place/Area Name:

Chile

North Latitude

-20.5000°

East Longitude

-68.6000°

South Latitude

-20.5100°

West Longitude

-70.1000°

Streets Terrain Satelite

Spatial Extent

Content

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Additional Metadata

Name	Value
DOI	10.1007/s10040-016-1454-3
Depth	5000
Scale	Other
Layers
Purpose	Scientific investigation (not related to applied problem)
GroMoPo_ID	118
IsVerified	True
Model Code	2D vertical transect model
Model Link	https://doi.org/10.1007/s10040-016-1454-3
Model Time	1000000 years
Model Year	2016
Model Authors	Richard S. Jayne, Ryan M. Pollyea, Justin P. Dodd, Elizabeth J. Olson, Susan K. Swanson
Model Country	Chile
Data Available	Report/paper only
Developer Email	rpollyea@vt.edu
Dominant Geology	Model focuses on multiple geologic materials
Developer Country	United States
Publication Title	Spatial and temporal constraints on regional-scale groundwater flow in the Pampa del Tamarugal Basin, Atacama Desert, Chile
Original Developer	No
Additional Information	Aquifers within the Pampa del Tamarugal Basin (Atacama Desert, northern Chile) are the sole source of water for the coastal city of Iquique and the economically important mining industry. Despite this, the regional groundwater system remains poorly understood. Although it is widely accepted that aquifer recharge originates as precipitation in the Altiplano and Andean Cordillera to the east, there remains debate on whether recharge is driven primarily by near-surface groundwater flow in response to periodic flood events or by basal groundwater flux through deep-seated basin fractures. In addressing this debate, the present study quantifies spatial and temporal variability in regional-scale groundwater flow paths at 20.5Â°S latitude by combining a two-dimensional model of groundwater and heat flow with field observations and Î´18O isotope values in surface water and groundwater. Results suggest that both previously proposed aquifer recharge mechanisms are likely influencing aquifers within the Pampa del Tamarugal Basin; however, each mechanism is operating on different spatial and temporal scales. Storm-driven flood events in the Altiplano readily transmit groundwater to the eastern Pampa del Tamarugal Basin through near-surface groundwater flow on short time scales, e.g., 100â€“101 years, but these effects are likely isolated to aquifers in the eastern third of the basin. In addition, this study illustrates a physical mechanism for groundwater originating in the eastern highlands to recharge aquifers and salars in the western Pampa del Tamarugal Basin over timescales of 104â€“105 years.
Integration or Coupling
Evaluation or Calibration	Unsure
Geologic Data Availability

How to Cite

GroMoPo, S. Ruzzante (2023). GroMoPo Metadata for Pampa del Tamarugal 2016 regional model, HydroShare, http://www.hydroshare.org/resource/bc923c69d680404cb80637f6aa565e2e

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

http://creativecommons.org/licenses/by/4.0/

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