| Using Fuzzy Relations and GIS Method to Evaluate Debris Flow Hazard |
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| 作者姓名： | SONG Shujun ZHANG Baolei FENG Wenlan ZHOU Wancun |
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| 作者单位： | [1]Institute of Mountain Hazards and Environment, Chinese Academy of Sciences,Chengdu 610041,Sichuan,China [2]Graduate University of Chinese Academy of Sciences, Beijing 100049,China |
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| 基金项目： | 中国科学院知识创新工程项目 |
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| 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.
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| 关 键 词： | 模糊关系 地理信息系统 GIS 泥石流 危险评估 自然灾害 |
| 文章编号： | 1007-1202（2006）04-0875-07 |
| 收稿时间： | 2005-11-20 |
Using fuzzy relations and GIS method to evaluate debris flow hazard |
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| SONG Shujun ZHANG Baolei FENG Wenlan ZHOU Wancun.Using Fuzzy Relations and GIS Method to Evaluate Debris Flow Hazard[J].Wuhan University Journal of Natural Sciences,2006,11(4):875-881. |
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| Authors: | Song Shujun Zhang Baolei Feng Wenlan Zhou Wancun |
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| Institution: | (1) Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, 610041 Chengdu, Sichuan, China;(2) Graduate University of Chinese Academy of Sciences, 100049 Beijing, China |
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| Abstract: | 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. |
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| Keywords: | fuzzy relations geographic information system (GIS) debris flows hazard evaluation |
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