GEOSCAN, résultats de la recherche


TitreGreat Slave TRACS - transportation risk in the Arctic to climatic sensitivity
AuteurWolfe, S A; Fraser, R; Kokelj, S V
Source39th Annual Yellowknife Geoscience Forum, abstracts of talks and posters; par Fischer, B J; Watson, D M; Northwest Territories Geoscience Office, Yellowknife Geoscience Forum Abstracts Volume vol. 2011, 2011 p. 124
LiensOnline - En ligne
Séries alt.Secteur des sciences de la Terre, Contribution externe 20110262
Réunion2011 Yellowknife Geoscience Forum; Yelloknife; CA; Novembre 15-17, 2011
Documentpublication en série
Mediapapier; en ligne; numérique
ProvinceTerritoires du Nord-Ouest
Sujetsdépôts glaciaires; elements glaciaires; topographie glaciaire; pergélisol; sensitivité de terrain; types de terrain; gestion de terrains; techniques de cartographie; cartographie par ordinateur; télédétection; géologie des dépôts meubles/géomorphologie; géologie de l'environnement; géologie de l'ingénieur
ProgrammeGestionaire de programme - sciences de changements climatiques, Géosciences de changements climatiques
Résumé(disponible en anglais seulement)
Great Slave - TRACS (Transportation Risk in the Arctic to Climate Sensitivity) is a collaborative project established to reduce the costs and risk of transportation infrastructure in the resource-rich area of the Northwest Territories, north of Yellowknife. Ground transportation infrastructure is critical to northern development. Economic development in the North is largely centred on mineral resources in the Slave Geological Province, north of Yellowknife, NWT. Ground transportation to the south requires all-weather road access across discontinuous permafrost terrain and winter-road access primarily across frozen lakes. Climate warming in the region poses risks to existing road and highway road infrastructure and requires adaptation measures to find alternatives to increasingly unreliable ice-roads.
Despite the mineral-rich nature of this region, surficial sediment maps, knowledge of permafrost, land cover, and geotechnical conditions are still rudimentary. This lack of basic geoscience information hinders the understanding of present and future terrain risks to roads, airports and other infrastructure which are vital to northern development. Through TRACS, federal, territorial, industry and academic collaborators will provide the geoscientific expertise to reduce risks and aid in adaptation solutions for land-based transportation infrastructure. This project aims to develop a geoscientific approach for terrain-climatic risk mapping to aid in maintenance and remediation of existing road infrastructure and land-based options to the present winter road corridor.
Four main activities represent the focus of TRACS over the next five years. These include a surficial geological context for terrain stability in the Great Slave region; land cover and change mapping for permafrost terrain conditions; permafrost sensitivity analysis to complex thermal and hydrological changes via modeling and field investigations; and risk assessments of highway infrastructure and proposed transportation corridors.
These activities require a range of geoscience data integration, including remote predictive mapping of surficial sediments and predictive ecological mapping using Landsat 7 and SPOT 5 satellite imagery; subsidence and lake ice mapping using RADARSAT-2; and detailed terrain mapping and using LiDAR and related optical imagery. These mapping initiatives are supported by field validations, geophysical surveys and measurements of permafrost geothermal and geotechnical characteristics to provide geoscience information needed for adaptation planning.