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TitreDelineation of lakes and channels in the Mackenzie Delta, NWT, using airborne LiDAR
AuteurCrasto, N; Hopkinson, C; Marsh, P; Forbes, D L; Spooner, I
SourceProceedings of Remote Sensing and Hydrology; International Association of Hydrological Sciences, Publication 352, 2012 p. 359-362
LiensOnline - En ligne
Séries alt.Secteur des sciences de la Terre, Contribution externe 20120055
RéunionRemote Sensing and Hydrology Symposium; Jackson Hole, Wyoming; US; Septembre 2010
Documentpublication en série
Mediapapier; en ligne; numérique
ProvinceTerritoires du Nord-Ouest
RégionInuvik; Fleuve Mackenzie
Lat/Long OENS-134.0833 -134.0000 68.3333 68.2500
Sujetshydrologie; télédétection; Nature et environnement
ProgrammeGéosciences de changements climatiques, Gestionaire de programme - sciences de changements climatiques
Résumé(disponible en anglais seulement)
A terrain-based method using locally adaptive thresholds that adjust to slope and orientation of banks was tested to delineate lake and channel banks in the Mackenzie Delta, NWT, Canada. Results will contribute to an improved understanding of the local hydrology, the development of a hydraulic model and studies on subsidence impacts of planned natural gas extraction projects in the area. In addition to prevalent terrain-based methods that use point elevations alone, an approach based on using a water mask was tested. Water masks can improve the accuracy of terrain-based bank delineation by: (a) suppressing the effect of low signal-to-noise areas; and (b) prioritizing regions around existing water bodies that are most likely to contain sill points.