Mots-clés
Analyse quantitative ; Bassin-versant ; Glissement de terrain ; LiDAR ; Modèle numérique de terrain ; Photographie aérienne ; Prévision ; Risque naturel ; Taïwan ; Typhon ; TélédétectionAerial photography ; Digital elevation model ; Forecast ; Landslide ; LiDAR ; Natural hazards ; Quantitative analysis ; Remote sensing ; Taiwan ; Typhoon ; WatershedAnálisis cuantitativo ; Cuenca hidrográfica ; Deslizamiento deterreno ; Fotografía aérea ; LiDAR ; Modelo numérico de terreno ; Previsión ; Riesgo natural ; Taiwan ; TeledetecciónApplication of a multi-temporal, LiDAR-derived, digital terrain model in a landslide-volume estimation
Auteur(s) et Affiliation(s)
TSENG, C.-M.
Dept. of Land Management and Development, Chang Jung Christian Univ., Tainan City, Taiwan, Province de Chine
LIN, C.-W.
Dept. of Earth Sciences, National Cheng Kung Univ., Tainan City, Taiwan, Province de Chine
STARK, C.P.
Lamont Doherty Earth Observatory, Columbia Univ., New York, Etats-Unis
LIU, J.-K.
LiDAR Technology, Zhubei City, Taiwan, Province de Chine
FEI, L.-Y.
Environmental and Engineering Geology Division, Central Geological Survey, MOEA, New Taipei City, Taiwan, Province de Chine
HSIEH, Y.-C.
Environmental and Engineering Geology Division, Central Geological Survey, MOEA, New Taipei City, Taiwan, Province de Chine
Description :
This paper uses a LiDAR-derived digital terrain model (DTM) taken in 2005 and 2010 (at 2 m resolution) to accurately obtain landslide-induced sediment volumes that resulted from a single catastrophic typhoon event in a heavily forested mountainous area of Taiwan. The landslides induced by Typhoon Morakot are mapped by comparison of 25 cm resolution aerial photographs taken before and after the typhoon in an 83.6 km2 study area. Each landslide volume is calculated by subtraction of the 2005 DTM from the 2010 DTM, and the scaling relationship between landslide area and its volume are further regressed. The uncertainty in estimated volume caused by use of the LiDAR DTMs is discussed, and also the error in absolute volume estimation for landslides in a small area. The volume–area relationship obtained in this study is also validated in 11 small to medium-sized catchments located outside the study area, and there is good agreement between the calculation from DTMs and the regression formula.
Type de document :
Article de périodique
Source :
Earth surface processes and landforms, issn : 0197-9337, 2013, vol. 38, n°. 13, p. 1587-1601, nombre de pages : 15, Références bibliographiques : 2 p.
Date :
2013
Editeur :
Pays édition : Royaume-Uni, Chichester, Wiley
Langue :
Anglais
Anglais
Droits :
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)