Using Fuzzy Relations and GIS Method to Evaluate Debris Flow Hazard

作     者：SONG Shujun ZHANG Baolei FENG Wenlan ZHOU Wancun 

作者机构：Institute of Mountain Hazards and Environment Chinese Academy of SciencesChengdu 610041SichuanChina Graduate University of Chinese Academy of Sciences Beijing 100049China 

出 版 物：《Wuhan University Journal of Natural Sciences》 (武汉大学学报（自然科学英文版）)

年 卷 期：2006年第11卷第4期

页      面：875-881页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 

基　　金：SupportedbytheKnowledgeInnovationProgramofChineseAcademyofSciences(KZCX2-SW-319-01) 

主　　题：fuzzy relations geographic information system (GIS) debris flows hazard evaluation 

摘      要：The study area, located in the southeast of Tibet along the Sichuan-Tibet highway, is a part of Palongzangbu River basin where mountain hazards take place frequently. On the ground of field surveying, historical data and previous research, a total of 31 debris flow gullies are identified in the study area and 5 factors are chosen as main parameters for evaluating the hazard of debris flows in this study. Spatial analyst functions of geographic information system （GIS） are utilized to produce debris flow inventory and parameter maps. All data are built into a spatial database for evaluating debris flow hazard. Integrated with GIS techniques,the fuzzy relation method is used to calculate the strength of relationship between debris flow inventory and parameters of the database. With this methodology,a hazard map of debris flows is produced. According to this map,6.6% of the study area is classified as very high hazard, 7.3% as high hazard,8.4% as moderate hazard,32. 1% as low hazard and 45.6% as very low hazard or non-hazard areas. After validating the results, this methodology is ultimately confirmed to be available.