Abstract
A logistic regression model is developed within the framework of a Geographic Information System (GIS) to map landslide hazards in a mountainous environment. A case study is conducted in the mountainous southern Mackenzie Valley, Northwest Territories, Canada. To determine the factors influencing landslides, data layers of geology, surface materials, land cover, and topography were analyzed by logistic regression analysis, and the results are used for landslide hazard mapping. In this study, bedrock, surface materials, slope, and difference between surface aspect and dip direction of the sedimentary rock were found to be the most important factors affecting landslide occurrence. The influence on landslides by interactions among geologic and geomorphic conditions is also analyzed, and used to develop a logistic regression model for landslide hazard mapping. The comparison of the results from the model including the interaction terms and the model not including the interaction terms indicate that interactions among the variables were found to be significant for predicting future landslide probability and locating high hazard areas. The results from this study demonstrate that the use of a logistic regression model within a GIS framework is useful and suitable for landslide hazard mapping in large mountainous geographic areas such as the southern Mackenzie Valley.
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Acknowledgements
This research was partially funded by a Natural Science and Engineering Research Council of Canada (NSERC) Discovery Grant awarded to Dr. Wang. The Landsat TM image was obtained from GeoGratis, Natural Resources Canada. The authors greatly acknowledge Professors John J. Claque and Paul M. Santi for their valuable comments on the manuscript.
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Chen, Z., Wang, J. Landslide hazard mapping using logistic regression model in Mackenzie Valley, Canada. Nat Hazards 42, 75–89 (2007). https://doi.org/10.1007/s11069-006-9061-6
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DOI: https://doi.org/10.1007/s11069-006-9061-6