大渡河加郡一得妥河段大型滑坡地质灾害遥感调查
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摘要
大渡河加郡—得妥河段的地质环境特殊,地质灾害发育,对各种工程活动的潜在危害很大。传统的地面调查方法,由于视野所限或交通不便等给区域地质调查带来许多困难。而利用遥感影像解译调查,可以直接按影像勾绘出地质灾害的分布范围,并确定其类别和性质,同时还可查明其产生原因、规模大小、危害程度、分布规律和发展趋势。基于大渡河加郡—得妥河段的Worldview(分辨率0.5 m)遥感影像,通过对影像进行系统化处理,建立正射影像地图及三维遥感图像模型,并结合先进的工程地质分析方法,对该河段内发育的大型滑坡地质灾害的发育特征及形成机理进行了研究,结果认为,该河段滑坡灾害主要受地形地貌和脆性断层控制,地震为其触发因素。
Because of the particular geological environmental setting,the geo-hazards frequently occurred in Daduhe River between Jiajun County and Detuo County,undercutting the safety of engineering activities in this area.The traditional field survey is limited in its short vision fields and inaccessible remote areas,while the interpretation based on remote sensing images could be used to obtain the distribution and scale of the hazards and then to solve the dilemma.Furthermore,the interpretation can be used in boundary delineation,categorization and characterization,identification of disaster genesis,scale and harmful degree,and development trend.Based on the Worldview(resolution: 0.5 m) remote sensing image of Daduhe River between Jiajun County and Detuo County,this paper processed the image systematically to rebuild orthophoto map and three-dimensional remote sensing image.Combined with field survey and geologic engineering comprehensive evaluation,the features and forming mechanism of large-scale landslide were studied.
Because of the particular geological environmental setting,the geo-hazards frequently occurred in Daduhe River between Jiajun County and Detuo County,undercutting the safety of engineering activities in this area.The traditional field survey is limited in its short vision fields and inaccessible remote areas,while the interpretation based on remote sensing images could be used to obtain the distribution and scale of the hazards and then to solve the dilemma.Furthermore,the interpretation can be used in boundary delineation,categorization and characterization,identification of disaster genesis,scale and harmful degree,and development trend.Based on the Worldview(resolution: 0.5 m) remote sensing image of Daduhe River between Jiajun County and Detuo County,this paper processed the image systematically to rebuild orthophoto map and three-dimensional remote sensing image.Combined with field survey and geologic engineering comprehensive evaluation,the features and forming mechanism of large-scale landslide were studied.
引文
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[2]沈芳,程东,黄润秋,等.3S技术在国土资源调查、环境保护及地质灾害评价与预测中的应用展望[J].成都理工学院学报,2000,27(S):235-238.
[3]乔彦肖,李密文,张维宸.基于遥感技术支持的地质灾害及孕灾环境综合评价[J].中国地质灾害与防治学报,2002,13(4):83-87.
[4]张振德,何宇华.遥感技术在长江三峡库区大型地质灾害调查中的应用[J].国土资源遥感,2003,2(6):11-26.
[5]杨武年,濮国梁.长江三峡库区地质灾害遥感图像信息处理及其监测和评估[J].地质学报,2005,79(3):423-430.
[6]严红萍,俞兵.主成分分析在遥感图像处理中的应用[J].资源环境与工程,2006,20(2):168-170.
[7]董增寿,张凤春,刘明君.卫星遥感图像增强处理方法研究[J].计算机仿真,2009,26(4):249-252.
[8]秦军.铁路工程地质信息的遥感图像处理[J].铁道工程学报,2006(S):258-263.
[9]江煜,谭娟,马晓波,等.遥感图像处理在“5.12”汶川地震抗震救灾工作中的应用[J].四川地质学报,2010,30(2):249-253.
[10]黄润秋.中国西南岩石高边坡的主要特征及其演化[J].地球科学进展,2005,20(3):292-297.
[11]国家地震局震害防御司.中国历史强震目录(公元前23世纪—公元1911)[M].北京:地震出版社,1995:490-492.
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