基于多光谱遥感的青海玉树地震震害监测与评估
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摘要
青海玉树7.1级地震使当地人民群众的生命和财产受到严重损失。利用多光谱遥感技术获取数据范围广、手段多等优势,以地震前后不同空间分辨率的航空和航天多光谱遥感影像作数据源,通过遥感和GIS技术的应用,对玉树地震的构造背景,地震重灾区的房屋建筑倒塌、场地震害、生命线工程等震害信息进行遥感监测和分析,并对监测区内毁坏严重的土木结构房屋分布、寺庙建筑损毁情况以及地裂缝滑坡、崩塌、碎屑流、塌陷等灾害的空间分布、规模、对道路等设施的影响进行了详细的评估。最后结合震害遥感评估结果,对震后恢复重建规划及实施从房屋建筑群烈度设防、房屋建筑群的具体选址以及房屋建筑的结构等方面提出了建议。
The devastating Yushu Earthquake occurred in Qinghai Province,northwest China,with a magnitude of 7.1 on Apirl 14,2010,which has caused huge destructive losses.Most buildings along the seismic zone were ruined,especially the old and the basic civil structure houses completely destroyed.The earthquake also triggered geological disasters,such as landslides,collapses,debris flows,etc.In the present study,the remote sensing technique was used to assess and analyze the situation of the earthquake damage.There are four classes of feature which can be interpreted according to the remote sensing imageries:(1) the damage degree of buildings,like civilian homes,temples;(2) the field disasters of earthquake,such as ground fissures,landslides,collapses,debris flows,and earthquake subsidence;(3) the damage degree of structures,such as dam;(4) the damage degree of the lifeline,for example,the highway. The features can be obtained according to high spatial resolution of remote sensing imageries,through image processing and interpretation methods.Post-disaster rehabilitation and reconstruction phase should fully consider the regional seismotectonic background and the carrying capacity of resources and environment.With the assessment results of earthquake disaster remote sensing,at last,preliminary suggestions were proposed for the rehabilitation and reconstruction planning of Yushu earthquake.
The devastating Yushu Earthquake occurred in Qinghai Province,northwest China,with a magnitude of 7.1 on Apirl 14,2010,which has caused huge destructive losses.Most buildings along the seismic zone were ruined,especially the old and the basic civil structure houses completely destroyed.The earthquake also triggered geological disasters,such as landslides,collapses,debris flows,etc.In the present study,the remote sensing technique was used to assess and analyze the situation of the earthquake damage.There are four classes of feature which can be interpreted according to the remote sensing imageries:(1) the damage degree of buildings,like civilian homes,temples;(2) the field disasters of earthquake,such as ground fissures,landslides,collapses,debris flows,and earthquake subsidence;(3) the damage degree of structures,such as dam;(4) the damage degree of the lifeline,for example,the highway. The features can be obtained according to high spatial resolution of remote sensing imageries,through image processing and interpretation methods.Post-disaster rehabilitation and reconstruction phase should fully consider the regional seismotectonic background and the carrying capacity of resources and environment.With the assessment results of earthquake disaster remote sensing,at last,preliminary suggestions were proposed for the rehabilitation and reconstruction planning of Yushu earthquake.
引文
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[6]China Earthquake-Site Emergency Response Team.2010.http://www.cea.gov.cn.
[2]WEI Cheng-jie,LIU Ya-lan,WANG Shi-xin,et al(魏成阶,刘亚岚,王世新,等).Journal of Remote Sensing(遥感学报),2008,12(5):673.
[3]WANG Shi-xin,ZHOU Yi,WEI Cheng-jie,et al(王世新,周艺,魏成阶,等).Journal of Remote Sensing(遥感学报),2009,13:364.
[4]WEI Cheng-jie,LIU Ya-lan,WANG Shi-xin,et al(魏成阶,刘亚岚,王世新,等).Remote Sensing in China(遥感在中国).Beijing:Pressof Earthquake(北京:地震出版社),2000.
[5]WANG Shi-xin,ZHOU Yi,WEI Cheng-jie,et al(王世新,周艺,魏成阶,等).Journal of Remote Sensing(遥感学报),2008,12(6):900.
[6]China Earthquake-Site Emergency Response Team.2010.http://www.cea.gov.cn.
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