DING Jun,ZHU Jing,WANG Lei,et al.Hazard Assessment of Geohazards in 5·12 Wenchuan Earthquake Hazard Area of Maoxian County[J].Research of Soil and Water Conservation,2010,17(05):12-16.
5·12汶川地震灾区茂县地质灾害危险性评价
- Title:
- Hazard Assessment of Geohazards in 5·12 Wenchuan Earthquake Hazard Area of Maoxian County
- Keywords:
- Wenchuan earthquake; geohazards; hazard assessment; fuzzy comprehensive evaluation; Maoxian County
- 分类号:
- P315;P694
- 摘要:
- 该文讨论了模糊综合评价模型和地理信息系统（GIS）相结合进行地质灾害危险性评价的方法。选取研究区内的地形坡度、海拔高程、地层岩性、河流缓冲区、断层缓冲区的灾害点分布频率作为评价指标，利用模糊综合评价模型进行地质灾害危险性评价；基于GIS系统强大的空间分析功能，实现对地理数据进行运算处理及评价结果图的输出。最后，以5·12汶川地震后的四川省茂县为例，实现研究区地质灾害危险性评价，研究表明：高危险区面积25.0%，地质灾害点占60.7%；中危险区面积33.1%，地质灾害点占24.4%；低危险区面积41.9%，地质灾害点占14.9%。地质灾害危险性评价结果可为政府部门的灾后重建及规划提供科学依据。
- Abstract:
- This article discussed the hazard assessment of geohazards triggered method using the model of fuzzy comprehensive evaluation and GIS system. Selecting the Geohazards frequency of the terrain gradient, altitude, stratigraphic lithology, rivers buffer, fault buffer in the study area as evaluation index, fuzzy comprehensive evaluation method is used for geological hazard assessment, based on the powerful spatial analysis functions system of GIS, to achieve geographical data processing operations. Finally, A case study in Maoxian County of Sichuan Province after the 5·12 Wenchuan earthquake, complete the hazard assessment of geohazards of stuty area. The results show that high-hazard area accounts for 25.0 percent and the nambers of geohazards in the study area accounts for 60.7 percent; moderate-hazard area accounts for 33.1 percent and the numbers of geohazards in this area accounts for 24.4 percent; low-hazard area accounts for 41.9 percent and the numbers of geohazards in this area accounts for 14.9 percent,Geohazards hazard assessment in earthquake areas can provide scientific suggestions for reconstruction and government decisions making.
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备注/Memo
收稿日期:2010-4-22;改回日期:2006-2-21。
基金项目:地质灾害防治与地质环境保护国家重点实验室自主研究基金（SKLGP2009Z004）
作者简介:丁军（1983- ），男，安徽阜阳市人，硕士，研究方向：地质灾害评价与防治、遥感与GIS应用。E-mail：jun_dj11@163.com
通讯作者:马琨（1972- ），男，博士，副教授，主要从事农业生态与土壤侵蚀研究。