Debris flow and landslide hazard mapping and risk analysis in China

• Published in: Frontiers of earth science 2012-09, Vol.6 (3), p.306-313
• Main Authors: LIU, Xilin, YU, Chengjun, SHI, Peijun, FANG, Weihua
• Format: Article
• Language: English
• Subjects: Debris flow; debris flow and landslide hazards; Detritus; Earth and Environmental Science; Earth Sciences; Emergency preparedness; Geographic information systems; Geological hazards; GIS mapping; hazardousness; Landslides; Landslides & mudslides; Research Article; Risk analysis; risk assessment and analysis; Risk factors; vulnerability; 中国; 制图; 危险性; 地理信息系统; 山体滑坡; 泥石流; 评估模型; 风险分析
• ISSN: 2095-0195; 2095-0209
• DOI: 10.1007/s11707-012-0328-9

This paper assesses the hazardousness, vulnerability and risk of debris flow and landslide in China and compiles maps with a scale of 1：6000000, based on Geographical Information System （GIS） technology, hazard regionalization map, socioeconomic data from 2000. Integrated hazardousness of debris flow and landslide is equivalent to the sum of debris flow hazardousness and landslide hazardousness. Vulnerability is assessed by employing a simplified assessment model. Risk is calculated by the following formula： Risk = Hazardousness × Vulnerability. The analysis results of assessment of hazardousness, vulnerability and risk show that there are extremely high risk regions of 104 km2, high risk regions of 283008 km2, moderate risk regions of 3161815 km2, low risk regions of 3299604km2, and extremely low risk regions of 2681709 km2. Exploitation activities should be prohibited in extremely high risk and high risk regions and restricted in moderate risk regions. The present study on risk analysis of debris flow and landslide not only sheds new light on the future work in this direction but also provides a scientific basis for disaster prevention and mitigation policy making.