• Login
    View Item 
    •   Home
    • Conferences, Meetings & Events
    • Seventh International Conference on Debris-Flow Hazards Mitigation - Proceedings
    • View Item
    •   Home
    • Conferences, Meetings & Events
    • Seventh International Conference on Debris-Flow Hazards Mitigation - Proceedings
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

    All of Mines RepositoryCommunitiesPublication DateAuthorsTitlesSubjectsThis CollectionPublication DateAuthorsTitlesSubjects

    My Account

    Login

    Mines Links

    Arthur Lakes LibraryColorado School of Mines

    Statistics

    Display Statistics

    Topographic change detection at Chalk Cliffs, Colorado, USA, using airborne lidar and UAS-based Structure-from-Motion photogrammetry

    • CSV
    • RefMan
    • EndNote
    • BibTex
    • RefWorks
    Thumbnail
    Name:
    02-02_Barnhart.pdf
    Size:
    5.240Mb
    Format:
    PDF
    Download
    Author
    Barnhart, Katherine R.
    Rengers, Francis K.
    Ghent, Jessica N.
    Tucker, Gregory E.
    Coe, Jeffrey A.
    Kean, Jason W.
    Smith, Joel B.
    Staley, Dennis M.
    Kleiber, William
    Wiens, Ashton M.
    Date issued
    2019
    Keywords
    structure-from-motion
    topographic difference map
    Chalk Cliffs
    
    Metadata
    Show full item record
    URI
    https://hdl.handle.net/11124/173233; http://dx.doi.org/10.25676/11124/173233
    Abstract
    The Chalk Cliffs debris-flow site is a small headwater catchment incised into highly fractured and hydrothermally altered quartz monzonite in a semiarid climate. Over half of the extremely steep basin is exposed bedrock. Debris flows occur multiple times per year in response to rainstorm events, typically during the summer monsoon season. The frequency of debris flows, and the uniformity of the underlying rock, make Chalk Cliffs an ideal study catchment for translating mechanistic understanding of natural debris flows to other sites. A 2008 National Center for Airborne Laser Mapping (NCALM) airborne lidar survey provides baseline topography for the site; however, heretofore there has been no systematic effort to collect repeat topography of the entire site. Starting in May 2018, we made repeat surveys of the basin with an unmanned aircraft system (UAS). The UAS-based imagery was processed into (x, y, z) point clouds using Structure-from-Motion (SfM) photogrammetry. We georegistered the point clouds using 12 ground control points placed within and around the study basin. In this study we compare the lidar with one SfM point cloud to assess topographic change over a 10-year time period. The difference map provides observational data relevant to understanding sediment provenance and transport at the Chalk Cliffs. The difference image indicates erosion of colluvial surfaces, with limited deposition in the survey area. Some colluvial hillslopes show spatially uniform erosion while others experienced concentrated erosion of up to 3 m depth over a 10-year period.
    Rights
    Copyright of the original work is retained by the authors.
    Collections
    Seventh International Conference on Debris-Flow Hazards Mitigation - Proceedings

    entitlement

     
    DSpace software (copyright © 2002 - 2023)  DuraSpace
    Quick Guide | Contact Us
    Open Repository is a service operated by 
    Atmire NV
     

    Export search results

    The export option will allow you to export the current search results of the entered query to a file. Different formats are available for download. To export the items, click on the button corresponding with the preferred download format.

    By default, clicking on the export buttons will result in a download of the allowed maximum amount of items.

    To select a subset of the search results, click "Selective Export" button and make a selection of the items you want to export. The amount of items that can be exported at once is similarly restricted as the full export.

    After making a selection, click one of the export format buttons. The amount of items that will be exported is indicated in the bubble next to export format.