CGRG Bibliography of Canadian Geomorphology
Search Results
Author : Godin, E.; and Fortier, D.
Date : 2010.
Title : Geomorphology of thermo-erosion gullies - case study from Bylot Island, Nunavut, Canada.
Publication : GEO2010: 63rd Canadian Geotechnical Conference & 6th Canadian Permafrost Conference. September 12-16, 2010. Canadian Geotechnical Society: Richmond, B.C.
Issue :
Page(s) : 1540-1547.
Abstract
In the valley of glacier C-79 on Bylot Island, snowmelt water runoff is creating thermo-erosion of permafrost wetlands. This process contributes to the rapid formation of gullies in ice-wedge polygons. One gully had been observed since 1999 and had a growth of 748 m since then. The geomorphology of this gully is characterized by an active thermoerosion zone near the gully head, a poorly-active zone near the outlet and a moderately active zone in-between. Feedback mechanisms contribute to the erosion processes governing the development of the gully, accelerating erosion at its head and stabilizing it at its outlet. Erosion features such as sinkholes, collapses and baydjarakhs were consequently observed in the gully. Thermo-erosion processes have remained active and have had an impact on the ecosystem for more than a decade.
Bibliography of Canadian Geomorphology