Title

Dataset for UAV-Based Quantification of Lahar Channel Dynamics at Volcán de Fuego, Guatemala

Summary & Purpose

This study quantifies erosional and depositional processes for secondary lahars at intermediate distances (~5-10 km) from the summit of Volcán de Fuego, Guatemala over the 2021 rainy season in the Las Lajas drainage. Volcán de Fuego in Guatemala erupts pyroclastic material in small Strombolian eruptions occurring every ~10 minutes as well as during paroxysmal eruptions producing larger pyroclastic currents at intervals from months to years. This intermediate distance is commonly where lahars impact infrastructure, agricultural resources, and can threaten local populations. A study region 5-10 km from the summit was surveyed with an Unoccupied Aerial Vehicle (UAV) at semi-regular monthly time intervals. Acquired imagery was processed into time-lapse structure from motion digital elevation models and stitched together to cover the target region. Repeat missions were differenced to find volumetric changes to time lapse digital elevation models. Analysis of morphological changes is binned in 500 m sections to track the evolution of the channel over time. This study’s objective is to determine how much material is mobilized by lahars during a typical rainy season at Fuego (May through October), and how that movement changes the morphology of the drainage. The largest secondary lahar volume changes at Fuego were a net 493 m^3/day loss in the upper reach and a net 438 m^3/day gain in the lower reach. The natural channel constriction and immediate widening of Las Lajas controls the behavior and stability of the stream below that point. Above that point, the channel is downcutting and meandering within an old flood plain, which was filled by a set of pyroclastic currents in 2018 spanning 16 hours with the main phase accounting for 5 hours, causing a diversion from the previous flow path.

Author Identifier

Jeffrey B. Johnson, ORCID: https://orcid.org/0000-0003-4179-8592

Date of Publication or Submission

6-5-2023

DOI

https://doi.org/10.18122/geo_data.7.boisestate

Funding Citation

NSF EAR 1914491

Single Dataset or Series?

Single Dataset

Data Format

*.tif

File Size

147Gb

Data Attributes

Each filename represents the region, date, and file type. For example "SA210607_DEM" is Section A (SA), date YYMMDD (210607), and digital elevation model (DEM). Orthomosaics will have the suffix "ORT" after the underscore. All DEMs and orthomosaics are at 10 cm resolution with no vertical exaggeration.

Map Area

14.409036, 14.436786

Map Area

-90.815189, -90.840251

Time Period

June 02, 2021 - October 12, 2021

Update Frequency

Other

Privacy and Confidentiality Statement

Boise State is explicitly compliant with federal and state laws surrounding data privacy including the protection of personal financial information through the Gramm-Leach-Bliley Act, personal medical information through HIPAA, HITECH and other regulations. All human subject data (e.g., surveys) has been collected and managed only by personnel with adequate human subject protection certification.

Use Restrictions

Users are free to share, copy, distribute and use the dataset; to create or produce works from the dataset; to adapt, modify, transform and build upon the dataset as long as the user attributes any public use of the dataset, or works produced from the dataset, referencing the author(s) and DOI link. For any use or redistribution of the dataset, or works produced from it, the user must make clear to others the license of the dataset and keep intact any notices on the original dataset.

Disclaimer of Warranty

BOISE STATE UNIVERSITY MAKES NO REPRESENTATIONS ABOUT THE SUITABILITY OF THE INFORMATION CONTAINED IN OR PROVIDED AS PART OF THE SYSTEM FOR ANY PURPOSE. ALL SUCH INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. BOISE STATE UNIVERSITY HEREBY DISCLAIMS ALL WARRANTIES AND CONDITIONS WITH REGARD TO THIS INFORMATION, INCLUDING ALL WARRANTIES AND CONDITIONS OF MERCHANTABILITY, WHETHER EXPRESS, IMPLIED OR STATUTORY, FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT.

IN NO EVENT SHALL BOISE STATE UNIVERSITY BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF INFORMATION AVAILABLE FROM THE SYSTEM.

THE INFORMATION PROVIDED BY THE SYSTEM COULD INCLUDE TECHNICAL INACCURACIES OR TYPOGRAPHICAL ERRORS. CHANGES ARE PERIODICALLY ADDED TO THE INFORMATION HEREIN. COMPANY AND/OR ITS RESPECTIVE SUPPLIERS MAY MAKE IMPROVEMENTS AND/OR CHANGES IN THE PRODUCT(S) AND/OR THE PROGRAM(S) DESCRIBED HEREIN AT ANY TIME, WITH OR WITHOUT NOTICE TO YOU.

BOISE STATE UNIVERSITY DOES NOT MAKE ANY ASSURANCES WITH REGARD TO THE ACCURACY OF THE RESULTS OR OUTPUT THAT DERIVES FROM USE OF THE SYSTEM.

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