Wang Fu-tao, Wang Shi-xin, Zhou Yi, Wang Li-tao, Yan Fu-li, Li Wen-jun, Liu Xiong-fei
Guang Pu Xue Yu Guang Pu Fen Xi. 2016 Jan;36(1):181-5.
The secondary geological disasters triggered by the Lushan earthquake on April 20, 2013, such as landslides, collapses, debris flows, etc., had caused great casualties and losses. We monitored the number and spatial distribution of the secondary geological disasters in the earthquake-hit area from airborne remote sensing images, which covered areas about 3 100 km2. The results showed that Lushan County, Baoxing County and Tianquan County were most severely affected; there were 164, 126 and 71 secondary geological disasters in these regions. Moreover, we analyzed the relationship between the distribution of the secondary geological disasters, geological structure and intensity. The results indicate that there were 4 high-hazard zones in the monitored area, one focused within six kilometers from the epicenter, and others are distributed along the two main fault zones of the Longmen Mountain. More than 97% secondary geological disasters occurred in zones with a seismic intensity of VII to IX degrees, a slope between 25 A degrees and 50 A degrees, and an altitude of between 800 and 2 000 m. At last, preliminary suggestions were proposed for the rehabilitation and reconstruction planning of Lushan earthquake. According to the analysis result, airborne and space borne remote sensing can be used accurately and effectively in almost real-time to monitor and assess secondary geological disasters, providing a scientific basis and decision making support for government emergency command and post-disaster reconstruction.
2013年4月20日芦山地震引发的滑坡、崩塌、泥石流等次生地质灾害造成了巨大人员伤亡和损失。我们利用覆盖面积约3100平方千米的航空遥感影像，对震区次生地质灾害的数量和空间分布进行了监测。结果显示，芦山县、宝兴县和天全县受灾最为严重，这些地区分别有164处、126处和71处次生地质灾害。此外，我们分析了次生地质灾害分布与地质构造及强度之间的关系。结果表明，监测区域内存在4个高危险区，其中一个集中在距震中6千米范围内，其他分布在龙门山两条主要断裂带上。超过97%的次生地质灾害发生在地震烈度为VII至IX度、坡度在25°至50°之间、海拔在800至2000米的区域。最后，针对芦山地震灾后恢复重建规划提出了初步建议。根据分析结果，航空和航天遥感能够准确、有效地近实时监测和评估次生地质灾害，为政府应急指挥和灾后重建提供科学依据和决策支持。
