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GroMoPo Metadata for Lower Piura Sub-basin Aquifer model


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Created: Feb 07, 2023 at 7:32 p.m.
Last updated: Feb 07, 2023 at 7:33 p.m.
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Abstract

The Lower Piura Sub-basin Aquifer is a vital source of water in the north of Peru. Despite its importance, few local studies describe this formation. Most are limited to reporting hydraulic characteristics and abstraction rates, lacking a broader analysis. This article characterizes the aquifer, presenting the development of a conceptual and mathematical model with sparse data, completed using several assumptions and interpolations. The model will improve understanding of the aquifer system and the impacts of abstraction. The aquifer system includes an unconfined aquifer connected to a confined aquifer through an aquitard. Steady-state and transient-state models from 2004 to 2014 were used. The development and calibration of the model have led to proper identification of hydraulic parameters and boundary conditions, clarifying the dynamics of the system. In the unconfined aquifer, groundwater flows towards the south-west without significant variation in the water table. Conversely, the piezometric surface of the confined aquifer shows a cone of depression with a falling trend of 1.6 m/year between 2004 and 2014. Outflows include abstractions (48.42 x 10(6) m(3)/year), gaining surface waters (6.33 x 10(6) m(3)/year), and sea discharge (18.50 x 10(6) m(3)/year). Inflows are from irrigation return (34.67 x 10(6) m(3)/year) and from the Higher Piura Aquifer (27.23 x 10(6) m(3)/year). The imbalance of 11.24 x 10(6) m(3)/year is abstracted from aquifer storage leading to hydraulic head drops and flow changes, revealing a clearly unsustainable overexploitation scenario that impacts more intensively the confined aquifer. Model results provide the basis to understand how this is happening and help to suggest strategies to alleviate the current aquifer situation.

Subject Keywords

Coverage

Spatial

Coordinate System/Geographic Projection:
WGS 84 EPSG:4326
Coordinate Units:
Decimal degrees
Place/Area Name:
Peru
North Latitude
-5.1035°
East Longitude
-79.7335°
South Latitude
-5.8897°
West Longitude
-80.8531°

Content

Additional Metadata

Name Value
DOI 10.1007/s10040-019-02027-7
Depth 28
Scale 1 001 - 10 000 km²
Layers 2-5 layers
Purpose Groundwater resources
GroMoPo_ID 109
IsVerified True
Model Code MODFLOW
Model Link https://doi.org/10.1007/s10040-019-02027-7
Model Time steady-state
Model Year 2019
Model Authors Arturo Velasco, José E. Capilla
Model Country Peru
Data Available Report/paper only
Developer Email
Dominant Geology Unconsolidated sediments
Developer Country Spain
Publication Title Hydrogeological characterization and assessment of anthropic impacts in the Lower Piura Sub-basin Aquifer in Peru
Original Developer No
Additional Information
Integration or Coupling None of the above
Evaluation or Calibration Static water levels;Dynamic water levels
Geologic Data Availability

How to Cite

GroMoPo, A. Quichimbo (2023). GroMoPo Metadata for Lower Piura Sub-basin Aquifer model, HydroShare, http://www.hydroshare.org/resource/72564f4d10d447bbb65f09f4afd392f2

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

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

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