| Titre | Applications of unmanned aerial vehicles for mapping coastal processes and intertidal marine habitats |
| Télécharger | Téléchargement (publication entière) |
| Auteur | Ierodiaconou, D; Murfitt, S; Allan, B; Bellgrove, A; Rattray, A; Kennedy, D; Howe, S; Schimel, A; Young, M |
| Source | Program and abstracts: 2017 GeoHab Conference, Dartmouth, Nova Scotia, Canada; par Todd, B J; Brown, C J; Lacharité, M; Gazzola, V; McCormack, E; Commission géologique du Canada, Dossier public 8295,
2017 p. 60, https://doi.org/10.4095/305860 (Accès ouvert) |
| Liens | GeoHab 2017
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| Année | 2017 |
| Éditeur | Ressources naturelles Canada |
| Réunion | 2017 GeoHab: Marine Geological and Biological Habitat Mapping; Dartmouth, NS; CA; mai 1-4, 2017 |
| Document | dossier public |
| Lang. | anglais |
| DOI | https://doi.org/10.4095/305860 |
| Media | en ligne; numérique |
| Référence reliée | Cette publication est contenue dans Todd, B J;
Brown, C J; Lacharité, M; Gazzola, V; McCormack, E; (2017). Program and abstracts: 2017 GeoHab Conference, Dartmouth, Nova Scotia, Canada, Commission géologique du Canada, Dossier public 8295 |
| Formats | pdf |
| Sujets | techniques de cartographie; océanographie; milieux marins; études côtières; conservation; organismes marins; écologie marine; gestion des ressources; peuplements biologiques; etudes de l'environnement;
écosystèmes; milieu intertidal; climat; télédétection; levés photogrammétriques; tempêtes; établissement de modèles; érosion côtière; sables; plages; récifs; biote; topographie du fond océanique; sédiments marins; dispersion des sédiments; biologie;
changement climatique; surveillance; véhicules aériens sans pilote; géologie marine; géologie des dépôts meubles/géomorphologie; géologie de l'environnement; géophysique; géologie de l'ingénieur; Nature et environnement |
| Illustrations | geophysical images |
| Programme | Géoscience de la gestion des océans, Géoscience en mer |
| Diffusé | 2017 09 26 |
| Résumé | (disponible en anglais seulement)
To address increasingly complex research questions and global challenges (e.g. climate change and biodiversity loss), the development, refinement and need of
new technology for monitoring marine coastal environments is increasing rapidly. Rapid advances in low-cost unmanned aerial vehicle (UAV) technology now allow for collection of centimetre resolution aerial imagery and topography suitable for
assessing change in coastal ecosystems. We demonstrate the utility of UAV-based photogrammetry to quantify storm-driven sediment dynamics on sandy beaches and assess biotic communities on intertidal platforms by comparing on ground measurements to
those that can be achieved with UAVs.
Aerial imagery collected before and after major storm events is ideal for the assessment of coastal landscape change. High-resolution aerial imagery and digital surface models were acquired and
change-detection techniques used to quantify change in the beachface following a high-magnitude event. An average beach erosion of 12.24 m3/m with a maximum of 28.05 m3/m was observed, and the volume of sand cut from the beachface and retreat of the
foredune are clearly illustrated. Following the storm event, erosion was estimated at 7,256± 504 m3 along 550 m of beach.
We also tested the utility of UAV remote sensing of intertidal reef platforms to traditional on-ground quadrat surveys for
monitoring intertidal marine protected areas (MPA), and investigated the role of UAV derived geomorphological variables in explaining observed intertidal algal and invertebrate assemblages. Sub centimetre aerial imagery and digital surface models
were acquired from intertidal reef platforms, and on-ground quadrat surveys collected intertidal biotic data for comparison. UAV's provided reliable estimates of dominant canopy-forming fucoid alga such as Hormosira banksii, however understorey
species were often obscured and underestimated. UAV derived geomorphic variables showed elevation and distance to seaward platform edge explained 19.7% and 15.9% of the variation in algal and invertebrate assemblage observed.
We demonstrate the
benefits of low-cost UAVs through rapid data collection, full coverage census, and generation of UAV geomorphic derivatives for characterising intertidal biological variation and sediment dynamics in the coastal zone. |
| GEOSCAN ID | 305860 |
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