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A GIS Based Approach to Map Wind Exposure for Windthrow Hazard Rating

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Wind exposure is one of the most important factors influencing the incidence of windthrow. A proper windthrow hazard management approach should include a method for assessing wind exposure as influenced by topography. This article discusses the design of a routine that enables the user to automatically map wind exposure over a landscape.

The routine is written for ArcView and is based on the distance-limited topex developed by the British Forestry Commission. It can calculate wind exposure over management units based on digital terrain models. Validation with a wind tunnel study has shown that it provides realistic estimates of wind exposure that can be used at the forest management level.
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Keywords: Topex; Wind exposure; topography; windthrow

Document Type: Miscellaneous

Affiliations: 1: Département des sciences du bois et de la forêt, Sainte-Foy, Université Laval, Québec, Canada, G1K 7P4, 2: UBC Forest Sciences, 3rd Floor Forest Sciences Centre, 3035-2424 Main Mall, Vancouver, BC, Canada, 3: Chemin de la croix de Valay, 70140 PESMES, France,

Publication date: 2002-12-01

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  • Each regional journal of applied forestry focuses on research, practice, and techniques targeted to foresters and allied professionals in specific regions of the United States and Canada. The Northern Journal of Applied Forestry covers northeastern, midwestern, and boreal forests in the United States and Canada.
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