標題: Topographic Correction of Wind-Driven Rainfall for Landslide Analysis in Central Taiwan with Validation from Aerial and Satellite Optical Images
作者: Liu, Jin-King
Shih, Peter T. Y.
土木工程學系
Department of Civil Engineering
關鍵字: landslide occurrence;landslide susceptibility;remote sensing;geohazard;kernel density estimation;tropical cyclone
公開日期: 1-六月-2013
摘要: Rainfall intensity plays an important role in landslide prediction especially in mountain areas. However, the rainfall intensity of a location is usually interpolated from rainfall recorded at nearby gauges without considering any possible effects of topographic slopes. In order to obtain reliable rainfall intensity for disaster mitigation, this study proposes a rainfall-vector projection method for topographic-corrected rainfall. The topographic-corrected rainfall is derived from wind speed, terminal velocity of raindrops, and topographical factors from digital terrain model. In addition, scatter plot was used to present landslide distribution with two triggering factors and kernel density analysis is adopted to enhance the perception of the distribution. Numerical analysis is conducted for a historic event, typhoon Mindulle, which occurred in 2004, in a location in central Taiwan. The largest correction reaches 11%, which indicates that topographic correction is significant. The corrected rainfall distribution is then applied to the analysis of landslide triggering factors. The result with corrected rainfall distribution provides better agreement with the actual landslide occurrence than the result without correction.
URI: http://dx.doi.org/10.3390/rs5062571
http://hdl.handle.net/11536/22328
ISSN: 2072-4292
DOI: 10.3390/rs5062571
期刊: REMOTE SENSING
Volume: 5
Issue: 6
起始頁: 2571
結束頁: 2589
顯示於類別:期刊論文


文件中的檔案:

  1. 000320771100001.pdf