Chalk Cliffs Channel Surveys derived from Structure-from-Motion
February 12, 2020
This data release contains two point clouds derived from structure-from-motion photogrammetry. The first survey was conducted on 10 September 2015 and the second survey was conducted on 1 June 2016. Each survey was designed to capture a 35-meter channel reach using digital photos (1187 photos were taken in the first survey and 1085 photos were taken in the second survey). Twenty-five bolts were drilled into the bedrock channel to serve as ground control points. We used a local coordinate system to create a reference frame, but the location of all of the ground control points are attached in the file called: GCPs_exported.txt. Agisoft photoscan was used to construct point clouds from the digital photos, and then sub-sampled the point clouds to a 1 cm spacing. The two subsampled point clouds are provided here in a las format. The .las files are open-source point cloud files and can be opened by any open-source point cloud viewer. Finally, the latitude/longitude of the center of the study area is: 38.733318, -106.187409.
This data was used in the paper: Rengers, F., Kean, J., Reitman, N., Smith, J., Coe, J., McGuire, L. 2020. The Influence of Frost Weathering on Debris Flow Sediment Supply in an Alpine Basin. Journal of Geophysical Research: Earth Surface. 10.1029/2019JF005369
This data was used in the paper: Rengers, F., Kean, J., Reitman, N., Smith, J., Coe, J., McGuire, L. 2020. The Influence of Frost Weathering on Debris Flow Sediment Supply in an Alpine Basin. Journal of Geophysical Research: Earth Surface. 10.1029/2019JF005369
Citation Information
Publication Year | 2020 |
---|---|
Title | Chalk Cliffs Channel Surveys derived from Structure-from-Motion |
DOI | 10.5066/F7CZ36BS |
Authors | Francis K Rengers |
Product Type | Data Release |
Record Source | USGS Asset Identifier Service (AIS) |
USGS Organization | Landslide Hazards Programs |
Rights | This work is marked with CC0 1.0 Universal |
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The influence of frost weathering on the debris flow sediment supply in an alpine basin
Rocky, alpine mountains are prone to mass wasting from debris flows. The Chalk Cliffs study area (central Colorado, USA) produces debris flows annually. These debris flows are triggered when overland flow driven by intense summer convective storms mobilizes large volumes of sediment within the channel network. Understanding the debris flow hazard in this, and similar alpine settings...
Authors
Francis K. Rengers, Jason W. Kean, Nadine G. Reitman, Joel B. Smith, Jeffrey A. Coe, Luke McGuire
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The influence of frost weathering on the debris flow sediment supply in an alpine basin
Rocky, alpine mountains are prone to mass wasting from debris flows. The Chalk Cliffs study area (central Colorado, USA) produces debris flows annually. These debris flows are triggered when overland flow driven by intense summer convective storms mobilizes large volumes of sediment within the channel network. Understanding the debris flow hazard in this, and similar alpine settings...
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Francis K. Rengers, Jason W. Kean, Nadine G. Reitman, Joel B. Smith, Jeffrey A. Coe, Luke McGuire