Snow depth mapping with unpiloted aerial system lidar observations: a case study in Durham, New Hampshire, United States
Terrestrial and airborne laser scanning and structure from motion techniques have emerged as viable methods to map snow depths. While these systems have advanced snow hydrology, these techniques have noted limitations in either horizontal or vertical resolution. Lidar on an unpiloted aerial vehicle...
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Copernicus Publications
2021
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Online Access: | https://doi.org/10.5194/tc-15-1485-2021 https://tc.copernicus.org/articles/15/1485/2021/tc-15-1485-2021.pdf https://doaj.org/article/02a8258edd6c463cbf6685d3e3a94271 |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:02a8258edd6c463cbf6685d3e3a94271 2023-05-15T18:32:18+02:00 Snow depth mapping with unpiloted aerial system lidar observations: a case study in Durham, New Hampshire, United States J. M. Jacobs A. G. Hunsaker F. B. Sullivan M. Palace E. A. Burakowski C. Herrick E. Cho 2021-03-01 https://doi.org/10.5194/tc-15-1485-2021 https://tc.copernicus.org/articles/15/1485/2021/tc-15-1485-2021.pdf https://doaj.org/article/02a8258edd6c463cbf6685d3e3a94271 en eng Copernicus Publications doi:10.5194/tc-15-1485-2021 1994-0416 1994-0424 https://tc.copernicus.org/articles/15/1485/2021/tc-15-1485-2021.pdf https://doaj.org/article/02a8258edd6c463cbf6685d3e3a94271 undefined The Cryosphere, Vol 15, Pp 1485-1500 (2021) geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2021 fttriple https://doi.org/10.5194/tc-15-1485-2021 2023-01-22T17:37:18Z Terrestrial and airborne laser scanning and structure from motion techniques have emerged as viable methods to map snow depths. While these systems have advanced snow hydrology, these techniques have noted limitations in either horizontal or vertical resolution. Lidar on an unpiloted aerial vehicle (UAV) is another potential method to observe field- and slope-scale variations at the vertical resolutions needed to resolve local variations in snowpack depth and to quantify snow depth when snowpacks are shallow. This paper provides some of the earliest snow depth mapping results on the landscape scale that were measured using lidar on a UAV. The system, which uses modest-cost, commercially available components, was assessed in a mixed deciduous and coniferous forest and open field for a thin snowpack (< 20 cm). The lidar-classified point clouds had an average of 90 and 364 points/m2 ground returns in the forest and field, respectively. In the field, in situ and lidar mean snow depths, at 0.4 m horizontal resolution, had a mean absolute difference of 0.96 cm and a root mean square error of 1.22 cm. At 1 m horizontal resolution, the field snow depth confidence intervals were consistently less than 1 cm. The forest areas had reduced performance with a mean absolute difference of 9.6 cm, a root mean square error of 10.5 cm, and an average one-sided confidence interval of 3.5 cm. Although the mean lidar snow depths were only 10.3 cm in the field and 6.0 cm in the forest, a pairwise Steel–Dwass test showed that snow depths were significantly different between the coniferous forest, the deciduous forest, and the field land covers (p < 0.0001). Snow depths were shallower, and snow depth confidence intervals were higher in areas with steep slopes. Results of this study suggest that performance depends on both the point cloud density, which can be increased or decreased by modifying the flight plan over different vegetation types, and the grid cell variability that depends on site surface conditions. Article in Journal/Newspaper The Cryosphere Unknown The Cryosphere 15 3 1485 1500 |
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geo envir J. M. Jacobs A. G. Hunsaker F. B. Sullivan M. Palace E. A. Burakowski C. Herrick E. Cho Snow depth mapping with unpiloted aerial system lidar observations: a case study in Durham, New Hampshire, United States |
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geo envir |
description |
Terrestrial and airborne laser scanning and structure from motion techniques have emerged as viable methods to map snow depths. While these systems have advanced snow hydrology, these techniques have noted limitations in either horizontal or vertical resolution. Lidar on an unpiloted aerial vehicle (UAV) is another potential method to observe field- and slope-scale variations at the vertical resolutions needed to resolve local variations in snowpack depth and to quantify snow depth when snowpacks are shallow. This paper provides some of the earliest snow depth mapping results on the landscape scale that were measured using lidar on a UAV. The system, which uses modest-cost, commercially available components, was assessed in a mixed deciduous and coniferous forest and open field for a thin snowpack (< 20 cm). The lidar-classified point clouds had an average of 90 and 364 points/m2 ground returns in the forest and field, respectively. In the field, in situ and lidar mean snow depths, at 0.4 m horizontal resolution, had a mean absolute difference of 0.96 cm and a root mean square error of 1.22 cm. At 1 m horizontal resolution, the field snow depth confidence intervals were consistently less than 1 cm. The forest areas had reduced performance with a mean absolute difference of 9.6 cm, a root mean square error of 10.5 cm, and an average one-sided confidence interval of 3.5 cm. Although the mean lidar snow depths were only 10.3 cm in the field and 6.0 cm in the forest, a pairwise Steel–Dwass test showed that snow depths were significantly different between the coniferous forest, the deciduous forest, and the field land covers (p < 0.0001). Snow depths were shallower, and snow depth confidence intervals were higher in areas with steep slopes. Results of this study suggest that performance depends on both the point cloud density, which can be increased or decreased by modifying the flight plan over different vegetation types, and the grid cell variability that depends on site surface conditions. |
format |
Article in Journal/Newspaper |
author |
J. M. Jacobs A. G. Hunsaker F. B. Sullivan M. Palace E. A. Burakowski C. Herrick E. Cho |
author_facet |
J. M. Jacobs A. G. Hunsaker F. B. Sullivan M. Palace E. A. Burakowski C. Herrick E. Cho |
author_sort |
J. M. Jacobs |
title |
Snow depth mapping with unpiloted aerial system lidar observations: a case study in Durham, New Hampshire, United States |
title_short |
Snow depth mapping with unpiloted aerial system lidar observations: a case study in Durham, New Hampshire, United States |
title_full |
Snow depth mapping with unpiloted aerial system lidar observations: a case study in Durham, New Hampshire, United States |
title_fullStr |
Snow depth mapping with unpiloted aerial system lidar observations: a case study in Durham, New Hampshire, United States |
title_full_unstemmed |
Snow depth mapping with unpiloted aerial system lidar observations: a case study in Durham, New Hampshire, United States |
title_sort |
snow depth mapping with unpiloted aerial system lidar observations: a case study in durham, new hampshire, united states |
publisher |
Copernicus Publications |
publishDate |
2021 |
url |
https://doi.org/10.5194/tc-15-1485-2021 https://tc.copernicus.org/articles/15/1485/2021/tc-15-1485-2021.pdf https://doaj.org/article/02a8258edd6c463cbf6685d3e3a94271 |
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The Cryosphere |
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The Cryosphere |
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The Cryosphere, Vol 15, Pp 1485-1500 (2021) |
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doi:10.5194/tc-15-1485-2021 1994-0416 1994-0424 https://tc.copernicus.org/articles/15/1485/2021/tc-15-1485-2021.pdf https://doaj.org/article/02a8258edd6c463cbf6685d3e3a94271 |
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https://doi.org/10.5194/tc-15-1485-2021 |
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