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[1]陶媛,胡凯衡,田永中,等.云南鲁甸地震次生山地灾害分布规律与特征[J].地球科学与环境学报,2015,37(04):84-93.
 TAO Yuan,HU Kai-heng,TIAN Yong-zhong,et al.Distribution and Characteristics of Secondary Mountain Hazards Triggered by Ludian Earthquake in Yunnan[J].Journal of Earth Sciences and Environment,2015,37(04):84-93.
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《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

卷:
第37卷
期数:
2015年第04期
页码:
84-93
栏目:
水资源与环境
出版日期:
2015-07-15

文章信息/Info

Title:
Distribution and Characteristics of Secondary Mountain Hazards Triggered by Ludian Earthquake in Yunnan
文章编号:
1672-6561(2015)04-0084-10
作者:
陶媛胡凯衡田永中葛永刚陈兴长
1. 西南大学 地理科学学院,重庆 400715; 2. 中国科学院山地灾害与地表过程重点实验室,四川 成都 610041; 3. 中国科学院水利部成都山地灾害与环境研究所,四川 成都 610041; 4. 西南科技大学 环境与资源学院,四川 绵阳 621010
Author(s):
TAO Yuan HU Kai-heng TIAN Yong-zhong GE Yong-gang CHEN Xing-chang
1. School of Geographical Sciences, Southwest University, Chongqing 400715, China; 2. Key Laboratory of Mountain Hazards and Earth Surface Processes, Chinese Academy of Sciences, Chengdu 610041, Sichuan, China; 3. Institute of Mountain Hazards and Environment, Chinese Academy of Sciences and Ministry of Water Resources, Chengdu 610041, Sichuan, China; 4. School of Environment and Resource, Southwest University of Science and Technology, Mianyang 621010, Sichuan, China
关键词:
鲁甸地震次生山地灾害空间分布GIS中心点密度面积百分比云南
Keywords:
Ludian earthquake secondary mountain hazard spatial distribution GIS center number density area percentage Yunnan
分类号:
P694
DOI:
-
文献标志码:
A
摘要:
2014年8月3日16时30分,云南省昭通市鲁甸县发生Ms6.5级地震,地震诱发大量崩塌、滑坡、不稳定斜坡等次生山地灾害。结合现场调查,通过遥感图像共解译次生山地灾害点235处,灾害面积约8.59 km2。基于GIS空间分析方法,利用次生山地灾害面积百分比及中心点密度2个参数,研究次生山地灾害分布规律与地震的关系;同时选取高程、坡度、坡向、岩性、距河流距离等因子统计分析了地形、岩层及河流对次生山地灾害空间分布的影响。研究区次生山地灾害面积百分比约为0.79%,中心点密度约为0.2 个?km-2。结果表明:次生山地灾害点的排列受NE向昭通—鲁甸主断裂控制,63.83%的次生山地灾害发生在发震断裂带2~8 km范围内,距震中越远,次生山地灾害发育率越低;次生山地灾害集中分布在1 000~1 200 m高程之间和35°~45°坡度范围内,而20°~30°坡度范围内次生山地灾害中心点密度和面积百分比最大;碳酸盐岩等硬岩地层上次生山地灾害最为发育,而软岩地层中多引发高陡坡次生山地灾害;次生山地灾害整体上沿牛栏江呈线状分布,随着距河流距离的增加,其发生概率逐渐减小。
Abstract:
At 16:30 on August 3rd, 2014, Ms 6.5 earthquake occurs in Ludian County of Zhaotong City, Yunnan Province, China. Ludian earthquake causes a wide spread of secondary mountain disasters including collapse, landslide, unstable slope, etc. By field investigation and interpretation of remote sensing images, there are 235 secondary mountain disasters, and the area is 8.59 km2. Based on GIS spatial analysis method, relationships between the distribution of secondary mountain disaster and earthquake were explained by secondary mountain disaster center number density and area percentage. The former is defined as the number of secondary mountain disaster central point per square kilometer; the latter is defined as the percentage of the area affected by secondary mountain disasters. The effects of topography, river and rock on spatial distribution of secondary mountain disasters were discussed with the factors including elevation, slope, aspect, lithology and distance from the river. Secondary mountain disaster center number density is about 0.2 points per square kilometer, and area percentage is about 0.79%. The results show that the arrangement of secondary mountain disaster is controlled by the main fault of Zhaotong-Ludian with NE-orientation, and 63.83% of secondary mountain disasters happen in the region with a distance of 2-8 km to the causative fault; secondary mountain disasters mainly distribute in the areas with the elevation of 1 000-1 200 m and the slope of 35°-45°; secondary mountain disaster center number density and area percentage are maximum under the slope of 20°-30°; secondary mountain disasters develop mostly in hard rock strata such as carbonate rock, while steep slope secondary mountain disasters develop mostly in soft rock strata; secondary mountain disasters approximately distribute in a line along Niulan River, and the farther away from the river, the lower the probability of occurrence is.

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备注/Memo

备注/Memo:
收稿日期:2015-02-04
基金项目:国家重点基础研究发展计划(“九七三”计划)项目(2015CB452704);国家自然科学基金项目(41371039)
作者简介:陶 媛(1990-),女,重庆市人,西南大学理学硕士研究生,E-mail:1036542372@qq.com。
通迅作者:胡凯衡(1975-),男,江西瑞金人,研究员,博士研究生导师,理学博士,E-mail:khhu@imde.ac.cn。
更新日期/Last Update: 2015-07-20