The Use of a Hydrological Catchment Model to Determine the Occurrence of Temporal Creeping in Deep-seated Landslides
48(4):153-162Sheng-En Lin  Ya-Hsin Chan  Chih-Yu Kuo * Rou-Fei Chen  Ya-Ju Hsu 
Kuo-Jen Chang  Shin-Ping Lee  Ruo-Ying Wu  Ching-Weei Lin 
* Corresponding Author. E-mail : firstname.lastname@example.org Show preview
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Application of Climate Change Scenario Data to Assess Debris Flow Impact and Volume
Application of a High-Resolution Digital Surface Model Produced by an Unmanned Aerial Vehicle in Canopy Gap Interpretation and Slope Stability Assessment
48(4):175-187Wei-Kai Huang* I Ting Ching-Fang Lee
* Corresponding Author. E-mail : email@example.com Show preview
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|Application of a High-Resolution Digital Surface Model Produced by an Unmanned Aerial Vehicle in Canopy Gap Interpretation and Slope Stability Assessment|
|Wei-Kai Huang* I Ting Ching-Fang Lee|
This study establishes a relationship between the density of canopy gaps and slope stability by using a
high-resolution digital surface model (DSM) made from images recorded by an unmanned aerial vehicle (UAV) to
semiautomatically estimate canopy gap density. Estimated gap density can be employed to identify potentially unstable slopes. The forested slopes adjacent to Xinzhuang Village in southern Taiwan were used as a case study. The estimated canopy gap density is consistent with that of the field investigation. Where the canopy gap density or slope gradient is low, the slope surface is generally undisturbed. Where canopy gaps are dense, tension cracks and scars are often present,bedrock orientation is more erratic, and gullies are more densely spaced on the slope surface. At the Xinzhuang village,a strongly negative relationship was identified between canopy irregularities detected in the DSM and slope instability.Canopy gap density detected with high-resolution DSM may therefore be a useful reference for preliminary slope hazard
Key Words: unmanned aerial vehicle, digital surface model, semiautomatic interpretation, canopy gap, slope stability.
〔1〕Disaster Prevention Technology Research Center, Sinotech Engineering Consultants, Inc., Taipei 114, Taiwan, R.O.C.
〔2〕Geotechnical Engineering Research Center, Sinotech Engineering Consultants, Inc., Taipei 114, Taiwan, R.O.C.
* Corresponding Author. E-mail : firstname.lastname@example.org
Scour from Vertical Drop through Flume Experiment and FLOW-3D
Elevation Variation Study in a Watershed Using Historical Topographic Maps
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