文化大學機構典藏 CCUR:Item 987654321/35407
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    jsp.display-item.identifier=請使用永久網址來引用或連結此文件: https://irlib.pccu.edu.tw/handle/987654321/35407


    题名: Direct Measurements of Bedrock Incision Rates on the Surface of a Large Dip-slope Landslide by Multi-Period Airborne Laser Scanning DEMs
    作者: Hsieh, YC (Hsieh, Yu-Chung)
    Chan, YC (Chan, Yu-Chang)
    Hu, JC (Hu, Jyr-Ching)
    Chen, YZ (Chen, Yi-Zhong)
    Chen, RF (Chen, Rou-Fei)
    Chen, MM (Chen, Mien-Ming)
    贡献者: 地質系
    关键词: multi-period ALS DEMs
    dip-slope landslide
    swath profiles
    incision rates
    日期: 2016-11
    上传时间: 2017-02-16 09:08:17 (UTC+8)
    摘要: This study uses three periods of airborne laser scanning (ALS) digital elevation model (DEM) data to analyze the short-term erosional features of the Tsaoling landslide triggered by the 1999 Chi-Chi earthquake in Taiwan. Two methods for calculating the bedrock incision rate, the equal-interval cross section selection method and the continuous swath profiles selection method, were used in the study after nearly ten years of gully incision following the earthquake-triggered dip-slope landslide. Multi-temporal gully incision rates were obtained using the continuous swath profiles selection method, which is considered a practical and convenient approach in terrain change studies. After error estimation and comparison of the multi-period ALS DEMs, the terrain change in different periods can be directly calculated, reducing time-consuming fieldwork such as installation of erosion pins and measurement of topographic cross sections on site. The gully bedrock incision rate calculated by the three periods of ALS DEMs on the surface of the Tsaoling landslide ranged from 0.23 m/year to 3.98 m/year. The local gully incision rate in the lower part of the landslide surface was found to be remarkably faster than that of the other regions, suggesting that the fast incision of the toe area possibly contributes to the occurrence of repeated landslides in the Tsaoling area.
    關聯: REMOTE SENSING 卷: 8 期:11 文獻號碼: 900
    显示于类别:[地質系] 期刊論文

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