GEOSCAN, résultats de la recherche


TitreTRAILS: collaborative permafrost terrain mapping, Dempster and Inuvik to Tuktoyaktuk highways corridor
AuteurSladen, W E; Morse, P D; Kokelj, S V; Smith, S L; Jardine, S; Kokoszka, J; van der Sluijs, J; Parker, R
Source2017 Yellowknife Geoscience Forum, abstract and summary volume; par Irwin, D; Gervais, S D; Terlaky, V; Northwest Territories Geological Survey, Yellowknife Geoscience Forum Abstract and Summary Volume 2017, 2017 p. 111-112 (Accès ouvert)
LiensOnline - En ligne (complete volume - volume complet, pdf, 1.69 MB)
Séries alt.Ressources naturelles Canada, Contribution externe 20180174
ÉditeurCommission géologique des Territoires du Nord-Ouest
Réunion45th Annual Yellowknife Geoscience Forum; Yellowknife, NT; CA; Novembre 13-16, 2017
Documentpublication en série
Mediapapier; en ligne; numérique
ProvinceTerritoires du Nord-Ouest; Yukon
SNRC106E; 106F; 106K; 106L; 106M; 106N; 107B; 107C
Lat/Long OENS-135.0000 -133.0000 69.5000 65.7500
Sujetspergélisol; glace fossile; analyses thermiques; télédétection; climat arctique; infrastructure; changement climatique; gestion; prise de décision; méthodologie; géologie des dépôts meubles/géomorphologie; géologie de l'environnement; géologie de l'ingénieur; Transport; géophysique; Nature et environnement
ProgrammePergélisols, Géosciences de changements climatiques
Diffusé2017 11 01
Résumé(disponible en anglais seulement)
Together, the Dempster (DH) and Inuvik to Tuktoyaktuk (ITH) highways create Canada's northernmost all-season road and the only one to provide access to the Arctic Ocean. The combined 870-km-long corridor traverses a variety of glaciated and non-glaciated terrain through Yukon and Northwest Territories, ranging from the Ogilvie Mountains in the south to the Arctic Coastal Plain in the north. Permafrost is continuous in 91 % of the corridor, but the varied relief, climate, vegetation, forest fire regimes, and landscape histories nevertheless have produced highly variable permafrost conditions. The technology and awareness of climate change in 1979, when the DH opened, contrast sharply with those that prevailed during the development of the soon-to-be-opened ITH, and a number of geotechnical challenges remain. Though the ITH was well investigated, many questions also remain regarding the role of glacial legacy and post-glacial landscape modifications on contemporary terrain sensitivity and embankment performance.
The Transportation Resilience in the Arctic Informed by Landscape Systems (TRAILS) research activity, Natural Resources Canada, operates in partnership with territorial and academic institutions, including the Northwest Territories Geological Survey and Department of Infrastructure, and also with the support of Transport Canada. The purpose is to conduct innovative permafrost research to address questions regarding landscape change in order to inform infrastructure management decisions. The DH-ITH corridor provides a landscape transect for conducting multidisciplinary research on permafrost thermal conditions, terrain sensitivity, and climate change impacts on terrain and infrastructure.
A primary goal of TRAILS is to improve permafrost terrain and surficial geology maps by developing a robust classification scheme and mapping methodology. In May 2017, we initiated a terrain mapping exercise using very high-resolution imagery and LiDAR data to identify geomorphological features and landscape types within the 10-km-wide corridor. The imagery is rendered in 3-D with Summit 3D software, and digitized features are input directly to ArcGIS using DAT/EM's Capture Interface. To date, 13 images, comprising 445 km (51 %) of the corridor, have been orthorectified and pan-sharpened, and 4 images (24 %) have been rendered in 3-D. Six test sections have been mapped to test and refine mapping methodology. Additional feature attributes will be assigned according to available geoscience data including surficial and bedrock geology, fire history, and drainage basin. These data will provide an important platform for understanding ground ice distribution and testing/validating remote sensing tools, and will facilitate assessment of landscape change and revision of the local surficial geology.
Résumé(Résumé en langage clair et simple, non publié)
L'activité de collaboration de la CGC sur la résilience des transports dans l'Arctique informée par les systèmes paysagers (TRAILS) consiste à mener des recherches de pointe sur le pergélisol avec des partenaires territoriaux et universitaires afin de répondre aux questions concernant la gestion des infrastructures. La cartographie du permafrost se concentre sur le corridor routier Dempster-Inuvik-Tutoyaktuk, le considérant comme un transect de paysage permettant d'effectuer des recherches multidisciplinaires sur les conditions thermiques du pergélisol, la sensibilité du terrain et les impacts du changement climatique sur le terrain et les infrastructures. La recherche repose sur le développement de cartes de surface et de terrain de haute qualité en développant un système de classification et une méthodologie de cartographie robustes. La cartographie et la méthodologie à ce jour sont discutées.