CGRG Bibliography of Canadian Geomorphology
Search Results
Author : Belanger, S.; and Filion, L.
Date : 1991
Title : Niveo-aeolian sand deposition in subarctic dunes, eastern coast of Hudson Bay, Quebec, Canada
Publication : Journal of Quaternary Science
Issue : 6(1):
Page(s) : 27-37
Abstract
Aeolian sand transport during winter and the snow-free season was assessed quantitatively by direct year-round field measurements along transects on the lee side of parabolic dunes in subarctic Quebec. In 1987-1988, niveo-aeolian deposition was more important than aeolian sedimentation in three of the four study sites, and contributed >75% of the total annual accumulation in exposed sites and <25% in protected forest sites. The maximum depth of interstratified snow and sand deposits (3.5 m) was recorded in March. Semi-permanent snow lenses may persist longer than 2 years in the aeolian sediments. After dissipation of snow, 22 cm of sand (as a maximum) accumulated on the slipface of the most active dunes, whereas only minor sand accumulation occurred in distant areas from active sand erosion. Wind-driven sand was dispersed over 7.4 km2 in the Whapmagoostui-Kuujjuarapik area. The accumulation of snow and sand during the snow season, together with spring thaw and collapse of the niveo-aeolian deposit, caused different types of injuries to trees, especially in 1985 and 1987 when a maximum of torn branches was recorded over the last 10 year period.
Bibliography of Canadian Geomorphology