Modelling permafrost distribution in the Canadian Rocky Mountains: a GIS-based approach
DOI:
https://doi.org/10.26485/BP/2000/39/5Keywords:
geographical information system, predicting permafrost distribution, Western CanadaAbstract
The vastness in size of permafrost regions in North America, together with the country's harsh climates and rugged terrain, present considerable problems for determining permafrost distribution. Direct methods for determining distribution are expensive and time consuming, so there is a need for indirect methods of prediction.
This study addresses the problem of predicting permafrost distribution. It represents a preliminary effort to develop an indirect method of predicting permafrost distribution in a mountainous region of Western Canada. The study area is Plateau Mountain, which is located about 80 km southwest of Calgary, Alberta, Canada in the outer ranges of the Rocky Mountains. The problem is addressed by using spatial analysis conducted within the geographical information system ARC/INFO. Specific criteria used to predict the probable location of permafrost are primarily derived from: 1) a digital elevation model of Plateau Mountain and 2) a landcover classification.
The results of the analysis are tested against known locations of permafrost to establish accuracy of the methodology. Results suggest 70% accuracy. This study is the impetus for further development of the methodology to predict permafrost distribution in Jasper National Park, Alberta, Canada - a project currently in progress.
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