Digital Terrain Modelling Using Corona and ALOS PRISM Data to Investigate the Distal Part of Imja Glacier,Khumbu Himal,Nepal

作     者：LAMSAL Damodar SAWAGAKI Takanobu WATANABE Teiji 

作者机构：Graduate School of Environmental ScienceHokkaido University Faculty of Environmental Earth ScienceHokkaido University 

出 版 物：《Journal of Mountain Science》 (山地科学学报（英文）)

年 卷 期：2011年第8卷第3期

页      面：390-402页

核心收录：

学科分类：07[理学] 0705[理学-地理学] 070501[理学-自然地理学] 

基　　金：the Japan Science Society (Sasagawa Research Fund) the Global Centre of Excellence (GCOE) programme by JSPS for partial funding 

主　　题：Imja Glacier Nepal Himalaya DTM Topographic map Surface lowering Corona ALOS PRISM 

摘      要：This study used Corona KH-4A and Advanced Land Observing Satellite (ALOS) PRISM images to generate digital terrain models (DTMs) of the distal part of Imja Glacier,where a few supraglacial ponds (～0.07 km 2) expanded into the large Imja Glacier Lake (Imja Tsho,～0.91 km 2) between 1964 and *** and subsequently derived topographical maps with contour intervals of 1 m were created from the high-resolution images (Corona in 1964 and ALOS in 2006) in the Leica Photogrammetric Suite (LPS) *** DTMs and topographic maps provided excellent representation of the elevation and micro-topography of the glacier surface,such as its supra-glacial ponds/lake,surface depressions,and moraine ridges,with an error of about +/-4 m (maximum).The DTMs produced from the Corona and ALOS PRISM images are suitable for use in studies of the surface change of *** topographical maps produced from the Corona data (1964) showed that part of the dead ice in the down-glacier area was even higher than the top of the lateral moraine ridges,while the glacier surface in the up-glacier area was noticeably lower than the moraine *** suggests more extensive melting of glacier ice in the up-glacier area before *** average lowering of the glacier surface from 1964 to 2006 was 16.9 m for the dead-ice area west of the lake and 47.4 m for the glacier surface east of the lake;between 1964 and 2002,the lake surface lowered by 82.3 *** figures represent average lowering rates of 0.4,1.1,and 2.2 m/year for the respective areas.