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| Titel |
Application of High-resolution LiDAR-derived DEM in Landslide Volume Estimation |
| VerfasserIn |
Chih-Ming Tseng, Ching Weei Lin, Jin King Liu |
| Konferenz |
EGU General Assembly 2011
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 13 (2011) |
| Datensatznummer |
250050124
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| Zusammenfassung |
| LiDAR(Light Detection and Ranging) is a relatively new technology and commonly applied
for the accurate morphometric and volumetric measurement of land features. This study used
high-resolution DEMs derived from multi-temporal airborne LiDAR to examine the
volumetric variation of landslides in the Southern Taiwan. Airborne LiDAR data were
acquired over the study area with a point density of at least 1 per m2. Using a SCOP++
adaptable prediction interpolation, the DEM grids were generated at a 2m resolution. By
comparing the LiDAR-based DEM in 2005 and 2010, an empirical relationship linking
landslide area A (m2) and volume V (m3), V=0.0146A1.523 is proposed in the present paper.
This formula was obtained through linear fit of 488 points of landslides. It allowed estimating
the total volume of landslide materials in an individual catchment. Besides, the results of cut
and fill analysis between two-temporal LiDAR-based DEM in a catchment scale shows
distinctly evolution processes of debris flow from the landslide mass source and
subsequent deposition area. It is concluded that the approach of using multi-temporal
high resolution LiDAR DEMs for understanding the time scale of landslide mass
movement is important to determine the debris flow susceptibility in a catchment. |
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