scholarly journals Active Layer Growth, Illisarvik Experimental Drained Lake Site, Richards Island, Northwest Territories

1982 ◽  
Author(s):  
J R Mackay
Keyword(s):  
Northwest Territories ◽  
Active Layer ◽  
Layer Growth ◽  
Lake Site

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

Radiological Monitoring Activities in the Northwest Territories, Canada

1987 ◽  
Vol 22 (4) ◽  
pp. 596-603
Author(s):  
A.S. Baweja ◽  
S.R. Joshi ◽  
D.J. Sutherland ◽  
B. Olding
Keyword(s):  
Surface Water ◽  
Northwest Territories ◽  
Uranium Mining ◽  
Mining Waste ◽  
Government Agencies ◽  
Radiological Monitoring ◽  
Similar Program ◽  
Baker Lake ◽  
Monitoring Activities ◽  
Lake Site

Abstract Results from the radiological monitoring activities relating to surface water and old uranium mining waste sites in the Northwest Territories are described. Data from the Baker Lake site reveal that the radionuclide levels in the surface water are quite low. In view of limited monitoring data, three new stations have been established in the Northwest Territories. Initiation of a similar program for the Yukon is recommended. Studies carried out at uranium mining waste sites by government agencies and private consultants concluded that the present levels of radionuclides in the associated waters were posing no health hazards.

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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