SwePub
Sök i LIBRIS databas

  Utökad sökning

onr:"swepub:oai:DiVA.org:su-223929"
 

Sökning: onr:"swepub:oai:DiVA.org:su-223929" > Grain size estimati...

  • Wong, Tyler (författare)

Grain size estimation in fluvial gravel bars using uncrewed aerial vehicles : A comparison between methods based on imagery and topography

  • Artikel/kapitelEngelska2024

Förlag, utgivningsår, omfång ...

  • 2024
  • printrdacarrier

Nummerbeteckningar

  • LIBRIS-ID:oai:DiVA.org:su-223929
  • https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-223929URI
  • https://doi.org/10.1002/esp.5709DOI

Kompletterande språkuppgifter

  • Språk:engelska
  • Sammanfattning på:engelska

Ingår i deldatabas

Klassifikation

  • Ämneskategori:ref swepub-contenttype
  • Ämneskategori:art swepub-publicationtype

Anmärkningar

  • Grain size assessments are necessary for understanding the various geomorphological, hydrological and ecological processes that occur within rivers. Recent research has shown that the application of Structure-from-Motion (SfM) photogrammetry to imagery from uncrewed aerial vehicles (UAVs) shows promise for rapidly characterising grain sizes along rivers in comparison to traditional field-based methods. Here, we evaluated the applicability of different methods for estimating grain sizes in gravel bars along a study reach in the Olentangy River in Columbus, Ohio. We collected imagery of these gravel bars with a UAV and processed those images with SfM photogrammetry software to produce three-dimensional point clouds and orthomosaics. Our evaluation compared statistical models calibrated on topographic roughness, which was computed from the point clouds, and to those based on image texture, which was computed from the orthomosaics. Our results showed that statistical models calibrated on image texture were more accurate than those based on topographic roughness. This might be because of site-specific patterns of grain size, shape and imbrication. Such patterns would have complicated the detection of topographic signatures associated with individual grains. Our work illustrates that UAV-SfM approaches show potential to be used as an accessible method for characterising surface grain sizes along rivers at higher spatial and temporal resolutions than those provided by traditional methods.

Ämnesord och genrebeteckningar

Biuppslag (personer, institutioner, konferenser, titlar ...)

  • Khanal, Sami (författare)
  • Zhao, Kaiguang (författare)
  • Lyon, Steve W.,1978-Stockholms universitet,Institutionen för naturgeografi,Ohio State University, USA(Swepub:su)stlyo (författare)
  • Stockholms universitetInstitutionen för naturgeografi (creator_code:org_t)

Sammanhörande titlar

  • Ingår i:Earth Surface Processes and Landforms49:1, s. 374-3920197-93371096-9837

Internetlänk

Hitta via bibliotek

Till lärosätets databas

Sök utanför SwePub

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

 
pil uppåt Stäng

Kopiera och spara länken för att återkomma till aktuell vy