GIS-based support vector machine model in shallow landslide hazards prediction: A case study on Ilam dam watershed, Iran
- سال انتشار: 1400
- محل انتشار: مجله طبیعت و علوم مکانی، دوره: 1، شماره: 1
- کد COI اختصاصی: JR_JONASS-1-1_001
- زبان مقاله: انگلیسی
- تعداد مشاهده: 407
نویسندگان
MAGTA Development Center Company
Centro de Investigaciones en Geografía Ambiental, Universidad Nacional Autónoma de México, Mexico
Faculty of Natural Resources, Yazd University, Yazd, Iran
Faculty of Natural Resources, Yazd University, Yazd, Iran
چکیده
Background and objective: The SVM algorithm is an applied method that has been considered in recent years to study landslides. The main purpose of this study is to evaluate the mapping power of the GIS-based SVM model with kernel functions analysis for spatial prediction of landslides at the Ilam dam watershed. Materials and methods: According to review sources, ۱۴ underlying factors including elevation, slope, aspect, plan curvature, profile curvature, LS factor, TWI, SPI, Lithologic units, land cover, NDVI, road distance, distance to the drainage channel, distance to fault were selected as factors affecting the occurrence of landslides in the study area and the mentioned layers were prepared in the GIS. In the present study, the non-linear two-class SVM method was used, the two-class SVM requires both datasets representing the occurrence of landslides and non-occurrence of landslides. The landslide inventory was randomly divided into a training dataset of ۷۵% for building the models and the remaining ۲۵% for the validation of the models. Results and conclusion: The validation results showed that the area of the prediction-rate curve under the curve (AUC) for landslide susceptibility maps produced by the SVM linear function, SVM polynomial function, SVM radial basic function, and SVM sigmoid function are ۰.۹۴۶, ۰.۹۳۱, ۰.۹۱۲, and ۰.۸۷۱ respectively. To assess the influences of factors on the landslide susceptibility map were used the Cohen’s kappa index of the model. The result shows that the most effective factors are the distance to roads, distance to drainages, and plan curvature in this area.کلیدواژه ها
Landslide susceptibility mapping, Support vector machines (SVM), GIS, Ilam damاطلاعات بیشتر در مورد COI
COI مخفف عبارت CIVILICA Object Identifier به معنی شناسه سیویلیکا برای اسناد است. COI کدی است که مطابق محل انتشار، به مقالات کنفرانسها و ژورنالهای داخل کشور به هنگام نمایه سازی بر روی پایگاه استنادی سیویلیکا اختصاص می یابد.
کد COI به مفهوم کد ملی اسناد نمایه شده در سیویلیکا است و کدی یکتا و ثابت است و به همین دلیل همواره قابلیت استناد و پیگیری دارد.