四川汶川“5.12”地震滑坡堰塞湖遥感监测分析
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摘要
运用可见光、雷达和航片等不同空间分辨率的多源遥感数据,对四川汶川"5.12"地震灾区因地震诱发形成的大型堰塞湖进行了遥感监测,对堰塞湖发生的地点、数量以及空间分布规律进行了讨论。重点对唐家山堰塞湖进行了动态监测,提取了其堰塞湖回水长度、水面面积与水量等信息,并对这一结果进行了详细分析,为地震滑坡堰塞湖科学处置与减灾决策提供了科学依据。
There happened a scale of 8 on the Richter calculations earthquake in Wenchuan County,Sichuan Province on May 12th of 2008.It caused a lot of landslides in Beichuan County and many landslide-dammed lakes had been formed,some of the lakes are at very urgent risk of dam breaking and would threaten downstream people.Results of an investigation on landslide-dammed lakes are analyzed after Wenchuan earthquake using various types of remote sensing data including aerial,visual,and SAR satellite data.This paper discusses the general role of distribution and variation of landslide-dammed lakes.The dynamics of the Tangjiashan landslide-dammed Lake,which is the largest one,is analyzed in detail.Area changes of the Tangjiashan landslide-dammed lake in different periods,including the course length and the water surface area of inundated region are obtained from images between May 14th and 26th.The course length and the water surface area were about 7.39km and 1.14 km2 on 14th May,respectively.By 26th May,the course length and the water surface area reached 17.6km and 4.09km2,respectively.The results provided basic information for disaster reduction of the landslide-dammed lakes in this region.
There happened a scale of 8 on the Richter calculations earthquake in Wenchuan County,Sichuan Province on May 12th of 2008.It caused a lot of landslides in Beichuan County and many landslide-dammed lakes had been formed,some of the lakes are at very urgent risk of dam breaking and would threaten downstream people.Results of an investigation on landslide-dammed lakes are analyzed after Wenchuan earthquake using various types of remote sensing data including aerial,visual,and SAR satellite data.This paper discusses the general role of distribution and variation of landslide-dammed lakes.The dynamics of the Tangjiashan landslide-dammed Lake,which is the largest one,is analyzed in detail.Area changes of the Tangjiashan landslide-dammed lake in different periods,including the course length and the water surface area of inundated region are obtained from images between May 14th and 26th.The course length and the water surface area were about 7.39km and 1.14 km2 on 14th May,respectively.By 26th May,the course length and the water surface area reached 17.6km and 4.09km2,respectively.The results provided basic information for disaster reduction of the landslide-dammed lakes in this region.
引文
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[2]潘世兵,李纪人.遥感技术在水利领域的应用.中国水利,2008,(21):63-65.
[3]范建容,田兵伟,程根伟等.基于多源遥感数据的5.12汶川地震诱发堰塞体信息提取.山地学报,2008,26(3):257-262.
[4]贾海峰,刘雪华等编著.环境遥感原理与应用,北京:清华大学出版社,2006.
[5]路京选.建立中国水资源信息学学科体系的刍议.地球信息科学,2004,6(1):11-13.
[6]Engm an E T,Gurney R J.Remote Sensing in Hydrology.Chapm an and Hall,1991.
[7]李纪人,潘世兵.信息技术在水利领域应用与展望,中国水利,2004,22.
[8]水利部国际合作与科技司.当代水利科技前沿.北京:中国水利水电出版社,2006.
[9]GertA S,Edw in T E.Remote Sensing in Hydrology andW aterM anagem ent.Springer,2000.
[10]毛锋,马金锋,周文生.北京防震历史经验与汶川地震灾后城镇选址重建.地球信息科学,2008,10(4):503-510.
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