NADIR AND OBLIQUE UAV PHOTOGRAMMETRY TECHNIQUES FOR QUANTITATIVE ROCK FALL EVALUATION IN THE RIMROCKS OF SOUTH-CENTRAL MONTANA
As our cities expand into geologically sensitive areas across the greater Rocky Mountain region and beyond, quantitative methods of assessment are increasingly critical for the development of evidence-based alternatives to avoid or mitigate geologic hazards. Unmanned Aerial Vehicle (UAV) photogramme...
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ftmontanatech:oai:digitalcommons.mtech.edu:grad_rsch-1243 2023-05-15T17:08:23+02:00 NADIR AND OBLIQUE UAV PHOTOGRAMMETRY TECHNIQUES FOR QUANTITATIVE ROCK FALL EVALUATION IN THE RIMROCKS OF SOUTH-CENTRAL MONTANA Gregory-Lederer, Micah 2020-04-01T07:00:00Z application/pdf https://digitalcommons.mtech.edu/grad_rsch/243 https://digitalcommons.mtech.edu/cgi/viewcontent.cgi?article=1243&context=grad_rsch unknown Digital Commons @ Montana Tech https://digitalcommons.mtech.edu/grad_rsch/243 https://digitalcommons.mtech.edu/cgi/viewcontent.cgi?article=1243&context=grad_rsch Graduate Theses & Non-Theses Unmanned aerial vehicles photogrammetry rock fall Rimrocks geologic hazards Geological Engineering text 2020 ftmontanatech 2022-05-30T16:10:43Z As our cities expand into geologically sensitive areas across the greater Rocky Mountain region and beyond, quantitative methods of assessment are increasingly critical for the development of evidence-based alternatives to avoid or mitigate geologic hazards. Unmanned Aerial Vehicle (UAV) photogrammetry can improve these geologic investigations by enabling remote visual inspection, measurement, and spatial analysis while eliminating many of the physical access limitations that contribute to field sampling bias and human error. UAV photogrammetry technology was employed to evaluate fragmental rock fall hazards at two locations in the Rimrocks region of south-central Montana, Zimmerman Trail Road and Phipps Park. At these sites, active retrogressive rock slope instability caused by differential erosion has produced damaging rock fall. Nadir and oblique imagery of the 35-acre Zimmerman Trail Road and 13-acre Phipps Park study areas was acquired with a DJI Phantom 4 Pro UAV and processed into digital photogrammetry with Pix4Dmapper. Remote methods of analysis were employed to measure the orientation of discontinuities in rock fall source areas and to quantify rock fall susceptibility. At Zimmerman Trail Road, photogrammetry data products were used to numerically differentiate rock fall hazard zones along the 0.3-mile long rock slope in accordance with the detailed Rock Fall Hazard Rating System (Pierson, 1991). At Phipps Park, photogrammetry was used to measure the size, run out distance, and change in elevation of high energy rock fall and to generate 2D and 3D slope profiles, which were used to model potential future rock fall. The methods and findings demonstrate how nadir and oblique UAV photogrammetry can be used to implement quantitative, defensible approaches for evaluating rock fall susceptibility and run out potential in geologic investigations of fragmental rock fall hazard areas. Text Long Rock Digital Commons @ Montana Tech Long Rock ENVELOPE(-61.198,-61.198,-62.689,-62.689) Zimmerman ENVELOPE(167.167,167.167,-73.300,-73.300) |
institution |
Open Polar |
collection |
Digital Commons @ Montana Tech |
op_collection_id |
ftmontanatech |
language |
unknown |
topic |
Unmanned aerial vehicles photogrammetry rock fall Rimrocks geologic hazards Geological Engineering |
spellingShingle |
Unmanned aerial vehicles photogrammetry rock fall Rimrocks geologic hazards Geological Engineering Gregory-Lederer, Micah NADIR AND OBLIQUE UAV PHOTOGRAMMETRY TECHNIQUES FOR QUANTITATIVE ROCK FALL EVALUATION IN THE RIMROCKS OF SOUTH-CENTRAL MONTANA |
topic_facet |
Unmanned aerial vehicles photogrammetry rock fall Rimrocks geologic hazards Geological Engineering |
description |
As our cities expand into geologically sensitive areas across the greater Rocky Mountain region and beyond, quantitative methods of assessment are increasingly critical for the development of evidence-based alternatives to avoid or mitigate geologic hazards. Unmanned Aerial Vehicle (UAV) photogrammetry can improve these geologic investigations by enabling remote visual inspection, measurement, and spatial analysis while eliminating many of the physical access limitations that contribute to field sampling bias and human error. UAV photogrammetry technology was employed to evaluate fragmental rock fall hazards at two locations in the Rimrocks region of south-central Montana, Zimmerman Trail Road and Phipps Park. At these sites, active retrogressive rock slope instability caused by differential erosion has produced damaging rock fall. Nadir and oblique imagery of the 35-acre Zimmerman Trail Road and 13-acre Phipps Park study areas was acquired with a DJI Phantom 4 Pro UAV and processed into digital photogrammetry with Pix4Dmapper. Remote methods of analysis were employed to measure the orientation of discontinuities in rock fall source areas and to quantify rock fall susceptibility. At Zimmerman Trail Road, photogrammetry data products were used to numerically differentiate rock fall hazard zones along the 0.3-mile long rock slope in accordance with the detailed Rock Fall Hazard Rating System (Pierson, 1991). At Phipps Park, photogrammetry was used to measure the size, run out distance, and change in elevation of high energy rock fall and to generate 2D and 3D slope profiles, which were used to model potential future rock fall. The methods and findings demonstrate how nadir and oblique UAV photogrammetry can be used to implement quantitative, defensible approaches for evaluating rock fall susceptibility and run out potential in geologic investigations of fragmental rock fall hazard areas. |
format |
Text |
author |
Gregory-Lederer, Micah |
author_facet |
Gregory-Lederer, Micah |
author_sort |
Gregory-Lederer, Micah |
title |
NADIR AND OBLIQUE UAV PHOTOGRAMMETRY TECHNIQUES FOR QUANTITATIVE ROCK FALL EVALUATION IN THE RIMROCKS OF SOUTH-CENTRAL MONTANA |
title_short |
NADIR AND OBLIQUE UAV PHOTOGRAMMETRY TECHNIQUES FOR QUANTITATIVE ROCK FALL EVALUATION IN THE RIMROCKS OF SOUTH-CENTRAL MONTANA |
title_full |
NADIR AND OBLIQUE UAV PHOTOGRAMMETRY TECHNIQUES FOR QUANTITATIVE ROCK FALL EVALUATION IN THE RIMROCKS OF SOUTH-CENTRAL MONTANA |
title_fullStr |
NADIR AND OBLIQUE UAV PHOTOGRAMMETRY TECHNIQUES FOR QUANTITATIVE ROCK FALL EVALUATION IN THE RIMROCKS OF SOUTH-CENTRAL MONTANA |
title_full_unstemmed |
NADIR AND OBLIQUE UAV PHOTOGRAMMETRY TECHNIQUES FOR QUANTITATIVE ROCK FALL EVALUATION IN THE RIMROCKS OF SOUTH-CENTRAL MONTANA |
title_sort |
nadir and oblique uav photogrammetry techniques for quantitative rock fall evaluation in the rimrocks of south-central montana |
publisher |
Digital Commons @ Montana Tech |
publishDate |
2020 |
url |
https://digitalcommons.mtech.edu/grad_rsch/243 https://digitalcommons.mtech.edu/cgi/viewcontent.cgi?article=1243&context=grad_rsch |
long_lat |
ENVELOPE(-61.198,-61.198,-62.689,-62.689) ENVELOPE(167.167,167.167,-73.300,-73.300) |
geographic |
Long Rock Zimmerman |
geographic_facet |
Long Rock Zimmerman |
genre |
Long Rock |
genre_facet |
Long Rock |
op_source |
Graduate Theses & Non-Theses |
op_relation |
https://digitalcommons.mtech.edu/grad_rsch/243 https://digitalcommons.mtech.edu/cgi/viewcontent.cgi?article=1243&context=grad_rsch |
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1766064121332105216 |