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Fiche 1,  Justifications,  Anglais

Record number: 1, Textual support number: 1 CONT

The proponents’ slope designs for permafrost conditions were based on establishing a series of threshold slope angles. The threshold angle(which can vary based on soil type and thermal region) represents the angle of a slope below which no thermal mitigation is required to ensure stability...  2, fiche 1, Anglais, - threshold%20slope%20angle

Fiche 1,  Justifications,  Français

Record number: 1, Textual support number: 1 CONT

Les plans de pente des promoteurs pour des conditions de pergélisol reposent sur l'établissement d'une série d'angles de seuil de la pente. L'angle limite (qui peut varier en fonction du type de sol et de la région thermique) représente l'angle depente au-dessous duquel aucune atténuation thermique n'est nécessaire en vue d'assurer la stabilité [...]  2, fiche 1, Français, - angle%20de%20seuil%20de%20la%20pente

Fiche 1,  Justifications,  Espagnol

Fiche 2,  Justifications,  Anglais

Record number: 2, Textual support number: 1 DEF

The topmost layer of soil that is subject to freeze/thaw alternations and lies above the permafrost.  2, fiche 2, Anglais, - active%20layer

Record number: 2, Textual support number: 1 CONT

The active layer overlies the permafrost, and comprises earth materials that thaw from the surface and refreeze each year. It forms the interface between permafrost and the atmosphere and biosphere. The thickness of the active layer influences vegetation and soil conditions, thereby influencing hunting, gathering, forestry and agriculture. Thickness, texture and moisture content of the active layer affects foundation conditions, transportation and construction. Changes in the active layer can contribute to problems of slope instability, with subsequent impact on transportation facilities and other structures. Therefore, it is important to understand the manner in which the active layer varies locally and regionally, and to understand its response to environmental change.  3, fiche 2, Anglais, - active%20layer

Record number: 2, Textual support number: 1 OBS

permafrost: Permanently frozen ground; generally with reference to a permanently frozen layer at some depth below the ground surface.  4, fiche 2, Anglais, - active%20layer

Record number: 2, Textual support number: 2 OBS

active layer: term used at Natural Resources Canada - Earth Sciences Sector.  5, fiche 2, Anglais, - active%20layer

Fiche 2,  Justifications,  Français

Record number: 2, Textual support number: 1 DEF

Couche superficielle du sol soumise aux alternances de gel et de dégel au-dessus d'un pergélisol.  3, fiche 2, Français, - couche%20active

Record number: 2, Textual support number: 1 CONT

Le mollisol repose sur le pergélisol et, d'autre part, l'atmosphère et la biosphère. L'épaisseur du mollisol influe sur la végétation et les conditions du sol, et par conséquent sur la chasse, la cueillette, la foresterie et l'agriculture. L'épaisseur, la texture et la teneur en humidité du mollisol influent sur la stabilité des fondations, le transport et la construction. Les changements subis par le mollisol peuvent causer l'instabilité des talus et avoir des répercussions sur les installations de transport et d'autres structures. Il est donc important de comprendre comment varie, à l'échelle locale et régionale, le mollisol et la façon dont il réagit aux changements environnementaux.  4, fiche 2, Français, - couche%20active

Record number: 2, Textual support number: 2 CONT

L'envergure des dommages aux infrastructures dans le Nord du Québec causés par tout changement dans la couche active du pergélisol, sa capacité portante et l'instabilité des versants et du relief doit être évaluée [...]  5, fiche 2, Français, - couche%20active

Record number: 2, Textual support number: 1 OBS

mollisol : terme en usage à Ressources naturelles Canada - Secteur des sciences de la Terre.  6, fiche 2, Français, - couche%20active

Fiche 2,  Justifications,  Espagnol

Fiche 3,  Justifications,  Anglais

Record number: 3, Textual support number: 1 CONT

The almost imperceptible slope of most of [Hudson Bay Lowland], its recent emergence, the snowmelt regime, permafrost pockets and even the numerous beaver dams are factors explaining the poorly integrated drainage system.  2, fiche 3, Anglais, - snowmelt%20regime

Fiche 3,  Justifications,  Français

Record number: 3, Textual support number: 1 CONT

Les pentes à peine perceptibles, l'émersion récente, le régime de fusion des neiges, les poches de pergélisol, et même les nombreux barrages de castors expliquent l'inefficacité du drainage [dans les basses terres de la mer d'Hudson].  3, fiche 3, Français, - r%C3%A9gime%20de%20fonte%20des%20neiges

Fiche 3,  Justifications,  Espagnol

Fiche 4,  Justifications,  Anglais

Record number: 4, Textual support number: 1 CONT

Patterned Ground Landforms. ... Thermokarst is a general term that refers to the many landforms that develop in response to the melting of ground ice ... Thawing permafrost creates uneven surfaces that primarily consist of subsidence features that collect water such as collapse scar bogs and small thermokarst lakes ... Two cases are presented to demonstrate the development of thermokarst features.  2, fiche 4, Anglais, - thermokarst%20features

Record number: 4, Textual support number: 2 CONT

Thermokarst features are produced by thawing of ground ice when the climate improves or by fires, disturbance of vegetation, erection of heated buildings, etc. in present-day permafrost areas. Localised collapse produces irregular hollows often with small thaw lakes, which progressively increase in size and coalesce to form large lakes(alases). Enlargment of thaw lakes occurs by thermo-erosion of the permafrost on the shores; this leads to slumping and the sediment released is often spread across the lake floor. The thaw-induced slope failures(ground-ice slumps) cause lake marginal cliffs to retreat at rates of 10 m/year or more. Small thaw lakes often form at the intersection of ice wedge polygons, and when these are joined by water in the marginal furrows of the polygons they form "beaded drainage". Thermokarst features cause many engineering(ground stability) problems encountered in permafrost regions.  3, fiche 4, Anglais, - thermokarst%20features

Fiche 4,  Justifications,  Français

Record number: 4, Textual support number: 1 DEF

Ensemble de formes en bosses et en creux attribuables à la fonte de la glace dans le sol.  1, fiche 4, Français, - model%C3%A9%20thermokarstique

Fiche 4,  Justifications,  Espagnol

Fiche 5,  Justifications,  Anglais

Record number: 5, Textual support number: 1 OBS

The almost imperceptible slope of most of [Hudson Bay Lowland], its recent emergence, the snowmelt regime, permafrost pockets and even the numerous beaver dams are factors explaining the poorly integrated drainage system.  1, fiche 5, Anglais, - permafrost%20pocket

Fiche 5,  Justifications,  Français

Record number: 5, Textual support number: 1 OBS

Les pentes à peine perceptibles, l'émersion récente, le régime de fusion des neiges, les poches de pergélisol, et même les nombreux barrages de castors expliquent l'inefficacité du drainage [dans les basses terres de la mer d'Hudson]  1, fiche 5, Français, - poche%20de%20perg%C3%A9lisol

Fiche 5,  Justifications,  Espagnol