應用地形分析、遙測影像判釋與PIV技術於紅菜坪地滑特徵及其分區之研究

Landslide Characterization and Zonation of Hungtsaiping Area Based on Topography, Image of Remote Sensing and PIV Technology

羅佳明(Chia-Ming Lo) ； 林銘郎(Ming-Lang Lin) ； 董家鈞(Jia-Jyun Dong) ； 張光宗(Kuang-Tsung Chang) ； 簡士堯(Shih-Yao Chien) ； 黃安斌(An-Bin Huang)

《中國土木水利工程學刊》 21卷2期 (2009/06) Pp. 113-128

https://doi.org/10.6652/JoCICHE.200906_21(2).0001

摘要

紅菜坪地滑涵蓋百餘公頃，滑動機制複雜且難以掌握，導致坡地災害防治工作難以施展。故本研究針對紅菜坪地區蒐集七個年代地形圖、集集地震前後SPOT衛星影像以及六個年代航照，進行地形分析、遙測影像判釋與PIV位移場分析，據以推估其地滑歷史、地滑塊體分區及其滑動潛能。經整合研究結果研判，紅菜坪地滑區可分成A、B、C、D 等四分區，整個地滑區於1904至1934年間地形變異極大，推估有大規模地滑事件發生，造成此四區範圍內皆為崩積層所覆蓋。而後續之滑動主要是崩積層與岩盤界面之再活動所引致，集集地震前後A、B、C 地滑區變形位移較大，而D 區較他區穩定，唯趾部及其南北邊界山溝下切侵蝕嚴重，亦應列為治理對象。研究同時發現，源頭處崩崖具持續崩退之趨勢，坡趾處有明顯之落石崖錐堆積，亦應注意其後續發展與影響。

關鍵字

紅菜坪地滑 ； 地形分析 ； 遙測影像 ； PIV

並列摘要

The area of Hungtsaiping Landslide covers hundreds of hectares. The sliding mechanisms are so complicated that makes the landslide control engineering difficult to carry out. In this study, we analyze the topographic and morphological changes, image of remote sensing and surface displacements comprehensively by the particle image velocimetry technology (PIV) for detailed landslide evolution, zonation with topographic maps of seven different periods (1904, 1934, 1977, 1984, 1991, 1998 and 1999) and aerial photographs of six different periods (1962, 1998, 1999, 2001, 2002 and 2004). From the results, we can differentiate Hungtsaiping Landslide area into A, B, C and D zone. Zones A, B and C locate at the central part of the landslide were classified as deep-seated landslides in the old colluvium, which had higher susceptibility for future activities. Zone D locates at the east of the landslide which were caused mainly by the river bank erosion and evaluated with a lower susceptibility for activities. Besides, the source area of cliff collapsed backward with numerous talus of rockfall deposits at their toe in different periods which should be listed for the further observation.

並列關鍵字

hungtsaiping landslide ； topographic ； image of remote sensing ； PIV