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ID 38852
本文ファイル
著者
キーワード
inundation simulation
complex topography
LiDAR
shallow water flow model
LIC
water level profile
NDC
建設工学・土木工学
抄録(英)
Since the topographical data obtained from LiDAR (Light Detection and Ranging) measurements is superior in resolution and accuracy as compared to conventional geospatial data, over the last decade aerial LiDAR (Light Detection and Ranging) has been widely used for obtaining geospatial information. However, digital terrain models made from LiDAR data retain some degree of uncertainty as a result of the measurement principles and the operational limitations of LiDAR surveying. LiDAR cannot precisely measure topographical elements such as ground undulation covered by vegetation, curbstones, etc. Such instrumental and physical uncertainties may impact an estimated result in an inundation flow simulation. Meanwhile, how much and how these topographical uncertainties affect calculated results is not understood. To evaluate the effect of topographical uncertainty on the calculated inundation flow, three representative terrains were prepared that included errors in elevation. Here, the topographical uncertainty that was introduced was generated using a fractal algorithm in order to represent the spatial structure of the elevation uncertainty. Then, inundation flows over model terrains were calculated with an unstructured finite volume flow model that solved shallow water equations. The sensitivity of the elevation uncertainty on the calculated inundated propagation, especially the local flow velocity, was evaluated. The predictability of inundation flow over complex topography is discussed, as well as its relationship to topographical features.
内容記述
This is a postprint of an article published by Elsevier B.V. in Journal of Hydrology, 2013, available online: http://doi.org/10.1016/j.jhydrol.2013.01.042.
掲載誌名
Journal of Hydrology
486巻
開始ページ
71
終了ページ
87
出版年月日
2013-04-12
ISSN
0022-1694
出版者DOI
言語
英語
NII資源タイプ
学術雑誌論文
広大資料タイプ
学術雑誌論文
DCMIタイプ
text
フォーマット
application/pdf
著者版フラグ
author
権利情報
Copyright (c) 2013 Elsevier B.V. All rights reserved.
関連情報URL
部局名
工学研究科