Portland State University PDXScholar Dissertations and Theses Dissertations and Theses 1990 Terrain disturbances by winter roads in the lower and central Mackenzie River Valley, N.W.T., Canada Christoph Gnieser Portland State University Follow this and additional works at: https://pdxscholar.library.pdx.edu/open_access_etds Part of the Geography Commons Let us know how access to this document benefits ou.y Recommended Citation Gnieser, Christoph, "Terrain disturbances by winter roads in the lower and central Mackenzie River Valley, N.W.T., Canada" (1990). Dissertations and Theses. Paper 4165. https://doi.org/10.15760/etd.6037 This Thesis is brought to you for free and open access. It has been accepted for inclusion in Dissertations and Theses by an authorized administrator of PDXScholar. Please contact us if we can make this document more accessible:
[email protected]. AN ABSTRACT OF THE THESIS OF Christoph Gnieser for the Master of Science in Geography presented August 8, 1990. Title: Terrain Disturbances by Winter Roads in the Lower and Central Mackenzie River Valley, N.W.T., Canada. APPROVED BY THE MEMBERS OF THE THESIS COMMITTEE: Robert 0. Tinnin Winter roads, built from compacted snow and I or ice, are common throughout the circumpolar North. They are considered effective and economical means of providing seasonal access into permafrost terrain while minimizing the potential for environmental damage. 2 The purpose of this study is an appraisal of long-term environmental impacts of winter roads by comparative assessment of terrain morphology, microclimate, permafrost, soils, and vegetation, on winter road right-of-ways and in adjacent undisturbed control areas.