Abstract
In the Three Gorges of China, there are frequent landslides, and the potential risk of landslides is tremendous. An efficient and accurate method of generating landslide susceptibility maps is very important to mitigate the loss of lives and properties caused by these landslides. This paper presents landslide susceptibility map** on the Zigui-Badong of the Three Gorges, using rough sets and back-propagation neural networks (BPNNs). Landslide locations were obtained from a landslide inventory map, supported by field surveys. Twenty-two landslide-related factors were extracted from the 1:10,000-scale topographic maps, 1:50,000-scale geological maps, Landsat ETM + satellite images with a spatial resolution of 28.5 m, and HJ-A satellite images with a spatial resolution of 30 m. Twelve key environmental factors were selected as independent variables using the rough set and correlation coefficient analysis, including elevation, slope, profile curvature, catchment aspect, catchment height, distance from drainage, engineering rock group, distance from faults, slope structure, land cover, topographic wetness index, and normalized difference vegetation index. The initial, three-layered, and four-layered BPNN were trained and then used to map landslide susceptibility, respectively. To evaluate the models, the susceptibility maps were validated by comparing with the existing landslide locations according to the area under the curve. The four-layered BPNN outperforms the other two models with the best accuracy of 91.53 %. Approximately 91.37 % of landslides were classified as high and very high landslide-prone areas. The validation results show sufficient agreement between the obtained susceptibility maps and the existing landslide locations.
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Acknowledgments
The authors would like to thank Prof. Pradhan and Dr. LaMoreaux for the helpful comments which improved the manuscript greatly. The study is jointly supported by NSFC (41271455/D0108), Open Research Fund of Key Laboratory of Disaster Reduction and Emergency Response Engineering of the Ministry of Civil Affairs (LDRERE20120207), the Fundamental Research Funds for the Central Universities, China University of Geosciences (Wuhan) (CUGL120207), and Open Research Fund Program of Key Laboratory of Digital Map** and Land Information Application Engineering, National Administration of Surveying, Map** and Geoinformation (GCWD201101).
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Wu, X., Niu, R., Ren, F. et al. Landslide susceptibility map** using rough sets and back-propagation neural networks in the Three Gorges, China. Environ Earth Sci 70, 1307–1318 (2013). https://doi.org/10.1007/s12665-013-2217-2
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DOI: https://doi.org/10.1007/s12665-013-2217-2