Application of Time Domain Reflectometry Technology to Quantification of Reflected Waveforms on Coaxial Cables with Shear and Extension Tests
Characteristics and Warning Methods of Ground Vibrations Generated by Debris Flows at Ai-Yu-Zi Creek
Establishment of Landslide Susceptibility Early Warning Model in National Forest Areas Based on Geo-intrinsic and Hydro-extrinsic Factors
Object-based Classification for Detecting Landslides and Vegetation Recovery—A Case at Baolai, Kaohsiung
49(2):98-109Ying-Tong Lin Kuo-Chen Chang * Ci-Jian Yang
* Corresponding Author. E-mail : email@example.com Show preview
| PDF( 6.33MB )
|Object-based Classification for Detecting Landslides and Vegetation Recovery—A Case at Baolai, Kaohsiung|
|Ying-Tong Lin Kuo-Chen Chang * Ci-Jian Yang|
This study used object-oriented analysis to classify landslides at Baolai village by using Formosat-2
satellite images. We used multiresolution segmentation to generate the blocks and hierarchical logic to classify five
types of features. We then classified the landslides and used univariate image differencing to observe the vegetation recovery after 6 years. We used the SHALSTB model to integrate landslide susceptibility maps. This study used the extreme example of 2009 typhoon Morakot, in which precipitation reached 1991.5 mm in 5 days, and selected a 1%sample with the highest modified success rate to produce the highest landslide susceptible area.
Both software programs exhibited high overall accuracy and kappa values. Because of boundary confusion, there were
some flaws in calculation. From 2009 to 2015, the landslide area decreased 50%. However, the river bank remains
unstable because of the ongoing erosion process. The landslide susceptibility maps indicated that the old landslide area was susceptible to landslides in an extreme event; however, we underestimated the landslide area.
Key Words: Object-oriented, classification, landslide, Baolai Village, FS.
〔1〕Department of Geography, National Taiwan Normal University, Taipei City, Taiwan, R.O.C.
〔2〕National Taiwan University Department of Geography, Taipei City, Taiwan, R.O.C.
* Corresponding Author. E-mail : firstname.lastname@example.org
Rheological Experiments and Slump Tests of Kaolin Slurries
Comparison of Downstream Erosion Between Permeable and Impermeable Groundsill Throung Flume Tests