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GroMoPo Metadata for Pampa del Tamarugal 2006 regional model

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Created: Feb 07, 2023 at 7:54 p.m.
Last updated: Feb 07, 2023 at 7:54 p.m.
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The Pampa del Tamarugal Aquifer (PTA) is an important source of groundwater in northern Chile. In this study, a groundwater flow model of this aquifer is developed and calibrated for the period 1983-2004. The model reproduces the observed flow-field and the water balance components reasonably well. Five scenarios are defined to evaluate the response to different pumping situations. These scenarios show that groundwater heads will continue to decrease with the present pumping discharge rates. To account for variations in the model results due to uncertainties in average recharge rates, randomly generated recharge realizations with different levels of uncertainty are simulated. Evaporation flow rates and groundwater flowing out of the modelled area seem unaffected by the recharge uncertainty, whereas the storage terms can vary considerably. For the most intensive pumping scenario under the generated random recharge rates, it is unlikely that the cumulative discharged volume from the aquifer, at the end of the simulation period, will be larger than 12% of the estimated groundwater reserve. Fluctuations in simulated groundwater heads due to uncertainties in the average recharge values are more noticeable in certain areas. These fluctuations could explain unusual behaviour in the observed groundwater heads in these areas.

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/s10040-006-0084-6
Depth 300
Scale 1 001 - 10 000 km²
Layers 1 layer
Purpose Groundwater resources
GroMoPo_ID 116
IsVerified True
Model Code MODFLOW
Model Link
Model Time 1983–2004
Model Year 2016
Model Authors Rojas, R., Dassargues, A.
Model Country Chile
Data Available Report/paper only
Developer Email
Dominant Geology Model focuses on multiple geologic materials
Developer Country Belgium
Publication Title Groundwater flow modelling of the regional aquifer of the Pampa del Tamarugal, northern Chile
Original Developer No
Additional Information
Integration or Coupling
Evaluation or Calibration
Geologic Data Availability

How to Cite

GroMoPo, S. Ruzzante (2023). GroMoPo Metadata for Pampa del Tamarugal 2006 regional model, HydroShare,

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


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