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Airborne electromagnetic and magnetic survey, western Hualapai Indian Reservation near Grand Canyon West and Peach Springs, Arizona, 2018: Inverted resistivity models

Metadata Updated: July 6, 2024

Airborne electromagnetic (AEM) and magnetic survey data were collected during March 2018 along 1,637 line kilometers over the western Hualapai Indian Reservation and surrounding areas. The survey was conducted as part of a study of the groundwater resources of the Truxton basin and Hualapai Plateau. The survey was designed to improve the understanding of the geometry of major hydrostratigraphic contacts of the study area.
Deterministic laterally constrained inversion of the processed AEM data ( was conducted using the AarhusINV code (Auken and others, 2014) implemented in Aarhus Workbench software (Aarhus Geosoftware, Aarhus, Denmark). Inversion parameters were selected by running a series of test models with varying starting model resistivity values, layer discretization, horizontal/lateral constraints, and other inversion parameters. A 32-layer fixed-depth smooth inversion model was developed with layer top depths ranging between 5 and 700 meters and layer thickness increasing with depth Inversions were run with vertical and lateral constraints of values of 4.0 and 1.6, respectively, and a 300 ohm-meter homogenous half-space starting model. Sensor altitude was treated as a free parameter after the 7th iteration. Depth of investigation was calculated with a minimum and maximum depth of 5 and 800 meters. The data provided include inverted resistivity models and plotted depth sections along all flight lines. Digital data are described in the data dictionary, additional details regarding data inversion are described in the metadata processing steps.

Access & Use Information

Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Metadata Created Date June 1, 2023
Metadata Updated Date July 6, 2024

Metadata Source

Harvested from DOI EDI

Additional Metadata

Resource Type Dataset
Metadata Created Date June 1, 2023
Metadata Updated Date July 6, 2024
Publisher U.S. Geological Survey
Identifier USGS:5d606026e4b01d82ce985590
Data Last Modified 20200820
Category geospatial
Public Access Level public
Bureau Code 010:12
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Harvest Object Id 88f5ad1c-abc6-4214-ad02-de684a7280ba
Harvest Source Id 52bfcc16-6e15-478f-809a-b1bc76f1aeda
Harvest Source Title DOI EDI
Metadata Type geospatial
Old Spatial -113.9995,35.2981,-113.1799,36.0351
Publisher Hierarchy White House > U.S. Department of the Interior > U.S. Geological Survey
Source Datajson Identifier True
Source Hash db114418db69458d9a11570cc4c19a191affce7f7e394c473a12a2aeac6eb767
Source Schema Version 1.1
Spatial {"type": "Polygon", "coordinates": -113.9995, 35.2981, -113.9995, 36.0351, -113.1799, 36.0351, -113.1799, 35.2981, -113.9995, 35.2981}

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