Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/34658
標題: A Study of Applying Remote Sensing Techniques on Landslide Changes
應用遙測技術於地滑地變遷之研析
作者: Liu, Jia-Hung
劉家宏
關鍵字: remote sensing;遙感探測;landslide;3-D laser scanning;electrical resistivity imagine profile;vegetation index;地滑地;三維雷射掃瞄;地電組影像剖面法;植生指標
出版社: 水土保持學系所
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摘要: 
本研究應用多種遙測技術於地滑地變遷分析上,包含衛星影像、三維雷射掃描、地電阻等,並針對以下課題進行分析、探討:(1)應用各種植生指標於地滑地判釋之探討;(2)應用三維雷射掃描技術於地滑地之裸露邊坡及植生回復區;(3)應用地電阻試驗於推估地滑地之地下水面位置;(4)地滑地穩定性分析;(5)以各種植生指標進行植生復育監測之探討等方面。
本研究以DEM結合地電阻推估地下水面位置,利用SLIDE程式進行地層參數倒算分析及邊坡穩定性分析。使用SPOT及FORMOSA2衛星影像,以IDRISI程式進行植生指標計算,比較各種植生指標於地滑地變遷判釋之優劣。另外,以不同時期之三維雷射掃描進行分析,評估裸露邊坡及植生回復之情形。
應用各種植生指標對於地滑地判釋結果,顯示Distance-based植生指標雖優於Slope-Based植生指標,但因計算Distance-based分析中之參數,需利用裸露地之光譜資料求得,對於應用於大範圍監測時,會因裸露地資訊不易取得而導致計算上資料缺乏之困難。
本研究應用地電阻影像剖面法推估地表下水面位置及滑動面,結果顯示地電阻可初步瞭解地層分佈情形與概估水層之分佈,有利於後續細部邊坡穩定性分析。

This study applies three remote sensing techniques, include satellite image analysis, three-dimensional laser scanning and electrical resistivity imagine profile (RIP) method to analyze and discuss the following topics: (1) using various vegetation indices to interpret a landslide, (2) using 3-D laser scanning on the barren slope and the vegetation recovery area of the landslide, (3) using RIP method to estimate the location of groundwater surface, (4) to analyze the stability of the landslide, (5) using various vegetation indices to investigate the area of vegetative restoration.
With DEM and the RIP results, this study adopts SLIDE program to back calculate the strength parameters of the strata and to analyze the stability of the landslide. Satellite images of SPOT and FORMOSA2 were input into IDRISI program to calculate vegetation indices to compare the effectiveness of various vegetation indices on interpretation of the landslide. Three-dimensional laser scanning results at three different times were used to roughly evaluate vegetative restoration of the studied area.
It is concluded that the distance-based indices are generally better than slope-based indices. However, the parameters of distance-base index analysis require spectra of barren surface. There may not be enough barren surfaces in a large area. Therefore, the parameters of distance-base index analysis are sometime difficult to obtain.
For applying the electrical resistivity imagine profile method, this study shows that RIP results can be used to roughly estimate the distribution of the strata and location of groundwater surface. This is very helpful on later detailed stability analysis of the landslide.
URI: http://hdl.handle.net/11455/34658
其他識別: U0005-1508200817021400
Appears in Collections:水土保持學系

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