Evaluation of deep learning algorithms for national scale landslide susceptibility mapping of Iran |
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| Authors: | Phuong Thao Thi Ngo Mahdi Panahi Khabat Khosravi Omid Ghorbanzadeh Narges Kariminejad Artemi Cerda Saro Lee |
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| Institution: | Institute of Research and Development,Duy Tan University,Da Nang,550000,Viet Nam;Division of Science Education,Kangwon National University,Chuncheon-si,Gangwon-do,24341,Republic of Korea;Geoscience Platform Division,Korea Institute of Geoscience and Mineral Resources (KIGAM),124,Gwahak-ro Yuseong-gu,Daejeon,34132,Republic of Korea;Department of Watershed Management Engineering,Sari Agricultural Science and Natural Resources University,Sari,Iran;Department of Geoinformatics–Z_GIS,University of Salzburg,Salzburg,5020,Austria;Department of Watershed and Arid Zone Management,Gorgan University of Agricultural Sciences and Natural Resources,Gorgan,49189-434,Iran;Soil Erosion and Desertification Research Group,Department of Geography,University of Valencia,Valencia,Spain;Geoscience Platform Division,Korea Institute of Geoscience and Mineral Resources (KIGAM),124,Gwahak-ro Yuseong-gu,Daejeon,34132,Republic of Korea;Department of Geophysical Exploration,Korea University of Science and Technology,217 Gajeong-ro Yuseong-gu,Daejeon,34113,Republic of Korea |
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| Abstract: | The identification of landslide-prone areas is an essential step in landslide hazard assessment and mitigation of landslide-related losses.In this study,we applied two novel deep learning algorithms,the recurrent neural network(RNN) and convolutional neural network(CNN),for national-scale landslide susceptibility mapping of Iran.We prepared a dataset comprising 4069 historical landslide locations and 11 conditioning factors(altitude,slope degree,profile curvature,distance to river,aspect,plan curvature,distance to road,distance to fault,rainfall,geology and land-sue) to construct a geospatial database and divided the data into the training and the testing dataset.We then developed RNN and CNN algorithms to generate landslide susceptibility maps of Iran using the training dataset.We calculated the receiver operating characteristic(ROC) curve and used the area under the curve(AUC) for the quantitative evaluation of the landslide susceptibility maps using the testing dataset.Better performance in both the training and testing phases was provided by the RNN algorithm(AUC=0.88) than by the CNN algorithm(AUC=0.85).Finally,we calculated areas of susceptibility for each province and found that 6% and 14% of the land area of Iran is very highly and highly susceptible to future landslide events,respectively,with the highest susceptibility in Chaharmahal and Bakhtiari Province(33.8%).About 31% of cities of Iran are located in areas with high and very high landslide susceptibility.The results of the present study will be useful for the development of landslide hazard mitigation strategies. |
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| Keywords: | CNN RNN Deep learning Landslide Iran |
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