標題: Lidar DEM for characterizing the volcanic landforms of Tatun Volcanoes in Metropolitan Taipei
作者: Liu, Jin-King
Chan, Yu-Chang
Shih, Tian-Yuan
Hsieh, Yu-Chung
土木工程學系
Department of Civil Engineering
關鍵字: Lidar;Tatun Volcano Group;landforms;Chicing Volcano;DEM
公開日期: 2007
摘要: Tatun Volcano Group is a cluster of dormant volcanoes surrounding Metropolitan Taipei. Rugged terrain, monotonic lithology and dense vegetation covers are adverse factors for mapping the geological structures. In this study, airborne Lidar survey was conducted to obtain a bare ground DEM with 2m grid and with an accuracy of decimeters. Shaded-relief images, pit-patterns and drainage networks are then derived from these DEMs for visual interpretation. 51 volcanoes are thus recognized. Two fissures running through the highest volcano in this area, namely Mount Seven-stars, are extending 2000m and 1000m, respectively. The largest width and depth of the opening of the ruptures is located in the west flank of the volcanic cone. The slope angle of the cast-wing of the volcanic cone is 36 degrees, whereas the angle of the west-wing is only 24.5 degrees. The opening of the west fissure is larger and its extension is longer than the east one. Thus, the west side can be subjected to an active extensional process of strain. The fissures could be resulted from the ongoing regional extension of the Tatun Volcanic area due to the plate subduction and collision of the Eurasian Plate and the Philippine Sea Plate.
URI: http://hdl.handle.net/11536/6257
ISBN: 978-1-4244-1211-2
期刊: IGARSS: 2007 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS 1-12: SENSING AND UNDERSTANDING OUR PLANET
起始頁: 3752
結束頁: 3755
顯示於類別:會議論文