Abstract
Debris flow sites were identified at 140 locations in the Xiaojiang Basin in Yunnan province, southwestern China. Their spatial distribution and catchment characteristics are described in detail on the basis of previous research, air photo interpretation, field investigation and mapping using Geographical Information Systems (GIS). Using a statistical approach, a quantitative model of hazards assessment and zonation was developed through synthesis analysis of basin areas, gradients, and the relative reliefs of these debris flow sites. In terms of debris flow hazard assessment, areas within the Xiaojiang Basin can be classified as severe, heavy and light hazard regions.
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Acknowledgements
We thank Liu Hong-Jiang, Chen Xiao-Qing, Hu Kai-Heng, and Yang Zhao-Lin for their field co-investigation and Prof. Tang Chuan, Li Yong and an anonymous reviewer for constructive suggestions. This study was funded by the special support project of Chinese Academy of Sciences for mountain hazards: debris flow and landslide, National Science Fund for Distinguished Young Scholars (40025103), and Special Support project of CAS for graduate student: the practice of science and society—innovation type.
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He, Y.P., Xie, H., Cui, P. et al. GIS-based hazard mapping and zonation of debris flows in Xiaojiang Basin, southwestern China. Env Geol 45, 286–293 (2003). https://doi.org/10.1007/s00254-003-0884-0
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DOI: https://doi.org/10.1007/s00254-003-0884-0