CGRG Bibliography of Canadian Geomorphology
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Author : Cote. M.M.; and Burn, C.R.
Date : 2001.
Title : A GIS-based analysis of the oreinted lakes on eastern Tuktoyaktuk Peninsula, Northwest Territories.
Publication : Canadian Quaternary Association/ Association canadienne pour l'etude du Quaternaire, Annual Meeting 2001. Whitehorse, Yukon Territory, August 20 – 24, 2001.
Issue :
Page(s) :
Abstract
The orientation, size and shape of 600 lakes on Tuktoyaktuk Peninsula were obtained from 1:250,000 digital NTS sheets 107C, D and E by ArcView GIS. These lakes are outside the glacial limits in a tundra plain with <15 m relief. The lakes range from1800 to 20 ha, and are of mean orientation N06°E, with standard deviation 38°. 145 former lake basins are identified on the maps, and smaller lakes are inset in 130 of these. The mean orientations of the former lake basins and inset lakes are not significantly different at the 0.01 level. The orientation of the lakes has been attributed to cross winds establishing currents which preferentially erode the ends of the lakes. Wind data from Tuktoyaktuk and Nicholson for 1970-95 indicate a consistent wind regime within the region. A wind-driven model of lake morphology provides an orientation of N15°E for all winds, and N13°E for winds above 20 km/h. The coincidence of the modeled orientation and the lake statistics supports the efficacy of wind-induced orientation. The similarity in orientation of existing lakes and former lake basins suggests that these processes have been effective for at least several centuries.
Bibliography of Canadian Geomorphology