Environmental conditions for rescue and earthquake impact rapid assessment in Ludian Earthquake area, Yunnan Province
Online published: 2014-09-25
Copyright
A magnitude 6.5 earthquake struck Ludian County, Zhaotong City, Yunnan Province at 16:30 on 3 August 2014, which caused severe damages on residential life and assets. In order to conduct a rapid earthquake impact assessment, we collected data on seismic intensity, topography, land use/land cover, population, residential area distribution, and buildings of the earthquake area and high-resolution remote sensing images. Spatial analysis in GIS and a quantitative evaluation model were employed for the assessment, which focused on the following aspects of the disaster area including natural environmental conditions of the severe impact area, impact on the affected population, buildings, roads and traffic, and other sensitive exposure units, and risk of secondary geological hazards along the Niulan River; and restoring from slope cropland to forest and preventing soil erosion. Based on the assessment results, this article provides the some suggestions for the earthquake relief effort, geological hazard prevention, and post-disaster reconstruction and ecological recovery of the Ludian seismic area.
KUANG Wenhui , CHI Wenfeng , GAO Chengfeng , DU Guoming , PAN Tao , YANG Tianrong , LIU Ailin . Environmental conditions for rescue and earthquake impact rapid assessment in Ludian Earthquake area, Yunnan Province[J]. PROGRESS IN GEOGRAPHY, 2014 , 33(9) : 1152 -1158 . DOI: 10.11820/dlkxjz.2014.09.002
Fig.1 Elevation of the Ludian Earthquake area图1 地震区域地形高程分布 |
Fig.2 Distribution of slope in the Ludian Earthquake area图2 地震区域坡度状况分布 |
Fig.3 Settlements by slope in the harder-hit area图3 重灾区不同坡度居民点统计 |
Fig.4 Population density in the earthquake area图4 地震区域人口密度分布 |
Fig.5 Damaged building area in the harder-hit area图5 重灾区房屋建筑受损面积统计 |
Fig.6 Density of buildings in the earthquake area图6 地震区域建筑物分布 |
Fig.7 Landslide disaster risk assessment in the Niulan River harder-hit section图7 牛栏江重灾区段次生灾害危险区域分布 |
Tab.1 Secondary disaster risk area and the area of residential land and population in each risk class in the Niulan River harder-hit section表1 牛栏江重灾区段次生灾害危险性评价分区面积、居民点和人口统计 |
分区 | 分区面积/km2 | 居民点面积/km2 | 影响人口/万人 |
---|---|---|---|
极高危险区 | 6 | 0.84 | 0.9 |
高度危险区 | 131 | 1.24 | 1.5 |
中度危险区 | 373 | 4.69 | 5.6 |
低度危险区 | 712 | 7.25 | 8.6 |
微度危险区 | 290 | 2.25 | 2.7 |
合计 | 1512 | 16.32 | 19.3 |
The authors have declared that no competing interests exist.
[1] |
|
[2] |
|
[3] |
|
[4] |
|
[5] |
|
[6] |
|
[7] |
|
[8] |
|
[9] |
|
[10] |
|
[11] |
|
[12] |
|
[13] |
|
[14] |
|
[15] |
|
[16] |
|
/
〈 | 〉 |