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Comprehensive assessment on landslides and debris flows in Sichuan Province based on GIS and RS
Zhang, BL1; Zhang, SM2; Zhou, WC3
Corresponding AuthorZhang, BL
Author of SourceChen, CL ; Major, JJ
meeting4th International Conference on Debris-Flow Hazards Mitigation - Mechanics, Prediction and Assessment
Conference DateSEP 10-13, 2007
Conference PlaceChengdu
Publication PlaceROTTERDAM
Contribution Rank3
Funding OrganizationAmer Geophys Union, Assoc Engn Geol, Amer Soc Civil Engineers, Environm & Water Resources Inst Amer, Amer Soc Civil Engineers, Geo-Inst, Geol Soc Amer, Int Assoc Hydraul Engn & Res, Int Assoc Hydrol Sci, Int Ctr Integrated Mt Dev, Int Consortium Landsides, Int Eros Control Assoc, Int Union Forest Res Org, Japan Landslides Soc, Japan Soc Eros Control Engn, US Geol Survey, Chinese Acad Sci, Chinese Govt Sichuan Province, Natl Nat Sci Fdn China
AbstractIntegrating the technology of remote sensing (RS) and geographic information systems (GIS), we built a comprehensive assessment information system for geo-hazards (landslides and debris flows). Locations of landslides and debris flows were established by manual interpretation after preprocessing RS images, and environmental factors were obtained through a method of GIS spatial analysis. Relationships between geo-hazard locations and each type of environmental factor were analyzed, and the factors closely related to geo-hazards were selected as the basic factors for a risk zonation. The values of the selected factors were evaluated through expert evaluation according to their relationships with geo-hazard locations, and the risk zonation was established using a method of analogy. Results indicated that the numbers of landslides and debris flows having areas >900 m(2) were 435 and 715, respectively, and that they were distributed mainly in the middle and southern parts of Sichuan Province. Slope, hypsography, lithology and rainfall were important conditions for both landslides and debris flows. Distance to a river and the degree of vegetation coverage were important for debris flows, but were of less importance for the occurrence of landslides. The regions with high risk degree were mainly in the south of Sichuan Province, especially near Panxi, and across a broad section of the middle of Sichuan Province. This research has done an effective exploration on an assessment of geological disasters using integrated RS and GIS technology, so as to provide a scientific basis for methods to prevent geological disasters.
Keywordlandslides and debris-flows comprehensive assessment Geographic Information Systems remote sensing Sichuan Province
Indexed ByEI ; CPCI
Accession numberAccession number:20085211816276
WOS IDWOS:000267333300047
Citation statistics
Document Type会议论文
Corresponding AuthorZhang, BL
Affiliation1.Shandong Normal University, Jinan, China;
2.Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China;
3.Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, China
Recommended Citation
GB/T 7714
Zhang, BL,Zhang, SM,Zhou, WC. Comprehensive assessment on landslides and debris flows in Sichuan Province based on GIS and RS[C]//Chen, CL, Major, JJ. ROTTERDAM:MILLPRESS SCIENCE PUBLISHERS,2007:491-500.
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