UAV-Based Quantification of Dynamic Lahar Channel Morphology at Volcán de Fuego, Guatemala
This study quantified erosional and depositional processes for secondary lahars in Las Lajas drainage at Volcán de Fuego, Guatemala, during the rainy season from May to October 2021. Abundant pyroclastic material from ongoing eruptive activity is remobilized seasonally during heavy precipitation, wh...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-07-01
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| Series: | Remote Sensing |
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| Online Access: | https://www.mdpi.com/2072-4292/15/15/3713 |
| _version_ | 1797586122160734208 |
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| author | Jerry C. Mock Jeffrey B. Johnson Armando Pineda Gustavo Bejar Amilcar Roca |
| author_facet | Jerry C. Mock Jeffrey B. Johnson Armando Pineda Gustavo Bejar Amilcar Roca |
| author_sort | Jerry C. Mock |
| collection | DOAJ |
| description | This study quantified erosional and depositional processes for secondary lahars in Las Lajas drainage at Volcán de Fuego, Guatemala, during the rainy season from May to October 2021. Abundant pyroclastic material from ongoing eruptive activity is remobilized seasonally during heavy precipitation, which can impact infrastructure and populations living near Fuego. Our region of focus was in an agricultural zone 6 to 10 km from the summit, surveyed with an unoccupied aerial vehicle (UAV) quadcopter at monthly intervals. Imagery was processed into overlapping time-lapse structure from motion digital elevation models (DEMs). DEMs were differenced to find volumetric changes as a function of the channel flow path distance (quantified in 500 m sections) to track channel morphology changes over time. The largest measured volume changes were a 490 m<sup>3</sup>/day loss in the upper section (~6 km from summit) and a 440 m<sup>3</sup>/day gain in the lower sections (~10 km from summit). We discussed how the natural channel’s constriction and widening of Las Lajas in more distal sections control the behavior and stability of the stream evolution. Above the constriction, the channel is primarily downcutting and meandering within an old flood plain, which had been filled in by pyroclastic materials deposited by the June 2018 paroxysm. |
| first_indexed | 2024-03-11T00:18:47Z |
| format | Article |
| id | doaj.art-cbd89dd0e36c4479a8bb1b8063541c62 |
| institution | Directory Open Access Journal |
| issn | 2072-4292 |
| language | English |
| last_indexed | 2024-03-11T00:18:47Z |
| publishDate | 2023-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Remote Sensing |
| spelling | doaj.art-cbd89dd0e36c4479a8bb1b8063541c622023-11-18T23:29:50ZengMDPI AGRemote Sensing2072-42922023-07-011515371310.3390/rs15153713UAV-Based Quantification of Dynamic Lahar Channel Morphology at Volcán de Fuego, GuatemalaJerry C. Mock0Jeffrey B. Johnson1Armando Pineda2Gustavo Bejar3Amilcar Roca4Department of Geosciences, Boise State University, Boise, ID 83725, USADepartment of Geosciences, Boise State University, Boise, ID 83725, USAIndependent Researcher, Guatemala City 01013, GuatemalaDepartment of Geological and Mining Engineering and Science, Michigan Technological University, Houghton, MI 49931, USAInstituto Nacional de Sismología, Vulcanologia, Meteorologia e Hidrología (INSIVUMEH), Guatemala City 01013, GuatemalaThis study quantified erosional and depositional processes for secondary lahars in Las Lajas drainage at Volcán de Fuego, Guatemala, during the rainy season from May to October 2021. Abundant pyroclastic material from ongoing eruptive activity is remobilized seasonally during heavy precipitation, which can impact infrastructure and populations living near Fuego. Our region of focus was in an agricultural zone 6 to 10 km from the summit, surveyed with an unoccupied aerial vehicle (UAV) quadcopter at monthly intervals. Imagery was processed into overlapping time-lapse structure from motion digital elevation models (DEMs). DEMs were differenced to find volumetric changes as a function of the channel flow path distance (quantified in 500 m sections) to track channel morphology changes over time. The largest measured volume changes were a 490 m<sup>3</sup>/day loss in the upper section (~6 km from summit) and a 440 m<sup>3</sup>/day gain in the lower sections (~10 km from summit). We discussed how the natural channel’s constriction and widening of Las Lajas in more distal sections control the behavior and stability of the stream evolution. Above the constriction, the channel is primarily downcutting and meandering within an old flood plain, which had been filled in by pyroclastic materials deposited by the June 2018 paroxysm.https://www.mdpi.com/2072-4292/15/15/3713DEMorthomosaicUAVvolcanolaharSfM |
| spellingShingle | Jerry C. Mock Jeffrey B. Johnson Armando Pineda Gustavo Bejar Amilcar Roca UAV-Based Quantification of Dynamic Lahar Channel Morphology at Volcán de Fuego, Guatemala Remote Sensing DEM orthomosaic UAV volcano lahar SfM |
| title | UAV-Based Quantification of Dynamic Lahar Channel Morphology at Volcán de Fuego, Guatemala |
| title_full | UAV-Based Quantification of Dynamic Lahar Channel Morphology at Volcán de Fuego, Guatemala |
| title_fullStr | UAV-Based Quantification of Dynamic Lahar Channel Morphology at Volcán de Fuego, Guatemala |
| title_full_unstemmed | UAV-Based Quantification of Dynamic Lahar Channel Morphology at Volcán de Fuego, Guatemala |
| title_short | UAV-Based Quantification of Dynamic Lahar Channel Morphology at Volcán de Fuego, Guatemala |
| title_sort | uav based quantification of dynamic lahar channel morphology at volcan de fuego guatemala |
| topic | DEM orthomosaic UAV volcano lahar SfM |
| url | https://www.mdpi.com/2072-4292/15/15/3713 |
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