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    Erosion processes in calanchi in the Upper Orcia Valley, Southern Tuscany, Italy based on multitemporal high-resolution terrestrial LiDAR and UAV surveys

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    Neugirg, Fabian ; Stark, Manuel ; Kaiser, Andreas ; Vlácilová, Markéta ; Della Seta, Marta ; Vergari, Francesca ; Schmidt, Jürgen ; Becht, Michael ; Haas, Florian:
    Erosion processes in calanchi in the Upper Orcia Valley, Southern Tuscany, Italy based on multitemporal high-resolution terrestrial LiDAR and UAV surveys.
    In: Geomorphology. 269 (21. Juni 2016). - S. 8-22.
    ISSN 0169-555x ; 1872-695x

    Volltext

    Volltext Link zum Volltext (externe URL):
    https://doi.org/10.1016/j.geomorph.2016.06.027

    Kurzfassung/Abstract

    A 125,000 m2 calanchi badland in the Province of Siena (Tuscany) was monitored with an unmanned aerial vehicle (UAV) and terrestrial laser scanning over the period of one year. TLS (terrestrial laser scanning) was carried out on two sample slopes, whereas the image acquisition of the UAV covered the entire catchment. In combination with ground control points, the UAV images were used to create orthophotos and 3D point clouds using the Structure from Motion (SfM) software Photoscan. The TLS surface models indicate seasonal differences in erosion and deposition. The surface change measured with SfM showed nearly 6.700 m3 of net material loss, resulting from 8.700 m3 erosion and 2.000 m3 deposition. These values reveal a mean annual surface lowering of 5.3 cm for the catchment. Additionally, several geomorphological processes, such as rill erosion, slope wash and translational slides could be detected in the one-year monitoring period. A comparison of TLS and SfM results showed differences in the calculated volumes of mobilised material. These discrepancies resulted from shadowing effects and low point densities of the TLS point clouds.

    Forschungsprojekte

    Quantifizierung, Analyse und Modellierung von Hangabtrag auf steilen Erosionshängen in unterschiedlichen klimatischen Räumen durch Ground-based Laserdaten

    Weitere Angaben

    Publikationsform:Artikel
    Schlagwörter:Calanchi; UAV; TLS; SfM
    Sprache des Eintrags:Englisch
    Institutionen der Universität:Mathematisch-Geographische Fakultät > Geographie > Lehrstuhl für Physische Geographie
    DOI / URN / ID:10.1016/j.geomorph.2016.06.027
    Open Access: Freie Zugänglichkeit des Volltexts?:Nein
    Peer-Review-Journal:Ja
    Verlag:Elsevier
    Die Zeitschrift ist nachgewiesen in:
    Titel an der KU entstanden:Ja
    KU.edoc-ID:18316
    Eingestellt am: 13. Jul 2016 14:51
    Letzte Änderung: 18. Jan 2024 09:20
    URL zu dieser Anzeige: https://edoc.ku.de/id/eprint/18316/
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