title: A Combination of Geographically Weighted Regression, Particle Swarm Optimization and Support Vector Machine for Landslide Susceptibility Mapping: A Case Study at Wanzhou in the Three Gorges Area, China.
abstract: In this study, a novel coupling model for landslide susceptibility mapping is presented. In practice, environmental factors may have different impacts at a local scale in study areas. To provide better predictions, a geographically weighted regression (GWR) technique is firstly used in our method to segment study areas into a series of prediction regions with appropriate sizes. Meanwhile, a support vector machine (SVM) classifier is exploited in each prediction region for landslide susceptibility mapping. To further improve the prediction performance, the particle swarm optimization (PSO) algorithm is used in the prediction regions to obtain optimal parameters for the SVM classifier. To evaluate the prediction performance of our model, several SVM-based prediction models are utilized for comparison on a study area of the Wanzhou district in the Three Gorges Reservoir. Experimental results, based on three objective quantitative measures and visual qualitative evaluation, indicate that our model can achieve better prediction accuracies and is more effective for landslide susceptibility mapping. For instance, our model can achieve an overall prediction accuracy of 91.10%, which is 7.8%-19.1% higher than the traditional SVM-based models. In addition, the obtained landslide susceptibility map by our model can demonstrate an intensive correlation between the classified very high-susceptibility zone and the previously investigated landslides.
authors.affiliation: Faculty of Information Engineering, China University of Geosciences, Wuhan 430074, China. yuxianyu1987@126.com.|Institute of Geophysics and Geomatics, China University of Geosciences, Wuhan 430074, China. yuxianyu1987@126.com.
authors.forename: Xianyu
authors.initials: X
authors.lastname: Yu
authors.affiliation: Institute of Geophysics and Geomatics, China University of Geosciences, Wuhan 430074, China. cug.yi.wang@gmail.com.
authors.forename: Yi
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Institute of Geophysics and Geomatics, China University of Geosciences, Wuhan 430074, China. rqniu@163.com.
authors.forename: Ruiqing
authors.initials: R
authors.lastname: Niu
authors.affiliation: Faculty of Information Engineering, China University of Geosciences, Wuhan 430074, China. hyj_06@163.com.
authors.forename: Youjian
authors.initials: Y
authors.lastname: Hu
mesh_terms: D000465:Algorithms; D002681:China; D005544:Forecasting; D055876:Landslides; D008962:Models, Theoretical; D000068916:Spatial Regression; D060388:Support Vector Machine
keywords: Three Gorges Reservoir; geographically weighted regression; landslide susceptibility mapping; particle swarm optimization; support vector machine