Susceptibility Evaluation of Debris-Flow in China Based on GIS
详细信息
- 责任者：Zhang Ruolin (China Institute of Geo-Environmental Monitoring ; Beijing 100081 ; China) ; Meng Hui
- 刊名：Journal of Chengdu University of Technology
- 出版年：2013
- 卷期：40(4)
- 关键词：泥石流 ; debris flows ; 中国 ; China
- 页码：p.379-386
- 图表：2 illus., 3 tables, 19 refs.
- 分类号：1800
- issnNo：ISSN1671-9727
- isbnNo：CN51-1634/N
摘要
The paper discusses the susceptibility degree of debris-flow throughout the country to provide basic evidences for the prevention and planning of geological disasters,the spatial layout of lands at a macro level,etc.In this study,taking Mainland China(not including Hong Kong,Macau and Taiwan) as the research area,the susceptibility evaluation is conducted based on 1 km×1 km evaluation unit,by selecting six factors such as relief amplitude,geomorphic type,active rift distance,petrofabric(lithology),rainstorm days(the average rainfall is ≥50 mm) and land use degree and using the probability ratio model.The sub-areas subject to the susceptibility degree of debris-flow throughout the country are formed and the results are tested.The results from the evaluation indicate that the area with high susceptibility accounts for 7% and the number of the debris-flow accounts for 52.50% of the total quantity of the debris-flows;the area with medium susceptibility accounts for 28% and the number of the debris-flow accounts for 33.51%;the area with low susceptibility accounts for 28% and the number of the debris-flow accounts for 11.45%;the area with little susceptibility accounts for 37% and the number of the debris-flow accounts for 2.55%.