Groundwater Flow in the Permafrost Active Layer, Inuvik, Northwest Territories

1975 ◽  
Author(s):  
A Lissey
Keyword(s):  
Groundwater Flow ◽  
Northwest Territories ◽  
Active Layer

Deformation associated with gypsum karst in the Salt River Escarpment, northeastern Alberta

1984 ◽  
Vol 21 (8) ◽  
pp. 949-959 ◽  
Author(s):  
Po C. Tsui ◽  
David M. Cruden
Keyword(s):  
Groundwater Flow ◽  
Northwest Territories ◽  
Middle Devonian ◽  
Normal Faults ◽  
Gypsum Karst ◽  
Salt River ◽  
Fort Smith ◽  
Devonian Age ◽  
Northeastern Alberta ◽  
Subsurface Cavities

An escarpment formed by the carbonate Keg River and evaporitic Chinchaga formations of Middle Devonian age extends southwards from the Slave River 30 km west of Fort Smith, Northwest Territories. Newly described folds in the bedrock are due to hydration of the anhydrite to gypsum in the Chinchaga Formation underlying the escarpment. Local groundwater flow has also dissolved subsurface cavities in the Chinchaga Formation. As these openings grew, the carbonates of the Keg River Formation subsided along stepped normal faults. Depressions within the fault blocks occurred where subsidence was concentrated along joints.

Active-layer characteristics and summer climatic indices, Mackenzie Valley, Northwest Territories, Canada

2009 ◽  
Vol 20 (2) ◽  
pp. 201-220 ◽  
Author(s):  
Sharon L. Smith ◽  
Stephen A. Wolfe ◽  
Daniel W. Riseborough ◽  
F. Mark Nixon
Keyword(s):  
Northwest Territories ◽  
Active Layer ◽  
Climatic Indices

scholarly journals Report on 2015 field activities and collection of ground thermal and active layer data in the Mackenzie Corridor, Northwest Territories

2016 ◽  
Author(s):  
S L Smith ◽  
J Chartrand ◽  
C Duchesne ◽  
M Ednie
Keyword(s):  
Northwest Territories ◽  
Active Layer

scholarly journals Active Layer Groundwater Flow: The Interrelated Effects of Stratigraphy, Thaw, and Topography

2019 ◽  
Vol 55 (8) ◽  
pp. 6555-6576 ◽  
Author(s):  
Michael T. O'Connor ◽  
M. Bayani Cardenas ◽  
Bethany T. Neilson ◽  
Kindra D. Nicholaides ◽  
George W. Kling
Keyword(s):  
Groundwater Flow ◽  
Active Layer

Till behavior and its relationship to active-layer hydrology, District of Keewatin, Northwest Territories

1988 ◽  
Vol 25 (1) ◽  
pp. 167-172 ◽  
Author(s):  
Larry Dyke ◽  
Paul Egginton
Keyword(s):  
Groundwater Flow ◽  
Bearing Capacity ◽  
Key Words ◽  
Active Layer ◽  
Canadian Arctic ◽  
Density Condition ◽  
Groundwater Seepage ◽  
Freeze Thaw ◽  
Bearing Strength ◽  
Somerset Island

Well-graded tills are a common surficial material over much of the Canadian Arctic from northern Manitoba to Somerset Island. The compactibility and bearing strength of these tills when thawed appear to be controlled by groundwater flow in the active layer. Water seeping from bedrock outcrops flanked by till enters the till active layer and flows via macropores formed as ice lenses thaw. This flow appears to retard consolidation of the till. Slopes having no seepage source consolidate more rapidly. This seepage maintains the till in a state highly susceptible to liquefaction and would yield material with a moisture–density condition unsuitable for construction use. Key words: till, surficial, compactibility, bearing capacity, groundwater, seepage, freeze–thaw, liquefaction.

The influence of snow cover, air temperature, and groundwater flow on the active-layer thermal regime of Arctic hillslopes drained by water tracks

2020 ◽  
Vol 28 (6) ◽  
pp. 2057-2069 ◽  
Author(s):  
Caitlin R. Rushlow ◽  
Audrey H. Sawyer ◽  
Clifford I. Voss ◽  
Sarah E. Godsey
Keyword(s):  
Groundwater Flow ◽  
Snow Cover ◽  
Active Layer ◽  
Air Temperature ◽  
Thermal Regime

Form and internal structure of active-layer detachment slides, Fosheim Peninsula, Ellesmere Island, Northwest Territories, Canada

1993 ◽  
Vol 30 (8) ◽  
pp. 1708-1714 ◽  
Author(s):  
Charles Harris ◽  
Antoni G. Lewkowicz
Keyword(s):  
Northwest Territories ◽  
Internal Structure ◽  
Shear Zone ◽  
Active Layer ◽  
Material Properties ◽  
Slope Failure ◽  
Shallow Landslides ◽  
Ellesmere Island ◽  
Basal Shear ◽  
Hydrological Regimes

Three recent shallow landslides over permafrost are described. Slides occur in low- to medium-plasticity clays containing some bands of silts and fine sands. Slope failure results from rapid thaw at the base of the active layer of soil that is ice-rich due to antecedent two-sided freezing. Displaced slide blocks retain their integrity because of hardening of the active layer by cryodesiccation and summer evaporation. Blocks move over a soft basal shear zone a few millimetres to several centimetres thick. Compression in the toe zone of slides is low at sites where runout is possible, but in other locations causes emergent shears and complex folding. Failure histories are varied and range from simple unitary slides to complex sequential failures in which active-layer segments are mobilized progressively higher up the slope. This study demonstrates the importance of active-layer thermal and hydrological regimes, in addition to material properties, in determining the mode of slope failure.

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