A study on rainfall-induced landslides in Alishan area using airborne LiDAR and digital photography

Jin King Liu*, Zu Yi Liao, Chi Chung Lau, Tian-Yuan Shih

*此作品的通信作者

研究成果: Conference contribution同行評審

1 引文 斯高帕斯(Scopus)

摘要

For understanding the distribution of slope angles, OHM and roughness of the rainfall-induced landslides in Alishan Area of Central Taiwan, a survey was carried out with airborne Lidar and aerial digital camera to obtain DTM and DSM of 1m grid and color orthophotos of 50cm grid. DTM, DSM and orthophotos are georeferenced and co-registered. The torrential rainfall on the 9 th June 2006 induced 106 landslides in the area of 36 km 2, as interpreted from the color orthophotos. The landslide polygons are then used for extracting slopes, OHM and roughness. Results show that the average slope angle of landslides is 41 degrees with a standard deviation of 14 degrees; average OHM is 4.4m with a standard deviation of 6.3m; average roughness is 2.05m with a standard deviation of 2.56m. It is also observed that scale effects are obvious for roughness but not for slope and OHM when the grid is larger than 40m, which is the average dimension of landslides. These morphometric parameters of rainfall-induced landslides can be further applied in the automation of landslide inventory.

原文English
主出版物標題28th Asian Conference on Remote Sensing 2007, ACRS 2007
頁面1963-1968
頁數6
出版狀態Published - 11月 2007
事件28th Asian Conference on Remote Sensing 2007, ACRS 2007 - Kuala Lumpur, Malaysia
持續時間: 12 11月 200716 11月 2007

出版系列

名字28th Asian Conference on Remote Sensing 2007, ACRS 2007
3

Conference

Conference28th Asian Conference on Remote Sensing 2007, ACRS 2007
國家/地區Malaysia
城市Kuala Lumpur
期間12/11/0716/11/07

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