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  1. B200 工学部/工学研究科
  2. B200a 雑誌掲載論文
  3. 学術雑誌

The uncertainty of local flow parameters during inundation flow over complex topographies with elevation errors

http://hdl.handle.net/2237/26873
4e69d5a4-e125-4c9b-ad78-47de5d34818a
名前 / ファイル ライセンス アクション
JHydrology_2013_486_71.pdf JHydrology_2013_486_71.pdf (3.5 MB)
Item type 学術雑誌論文 / Journal Article(1)
公開日 2017-08-03
タイトル
タイトル The uncertainty of local flow parameters during inundation flow over complex topographies with elevation errors
著者 Tsubaki, Ryota

× Tsubaki, Ryota

WEKO 73052

Tsubaki, Ryota

Search repository
Kawahara, Yoshihisa

× Kawahara, Yoshihisa

WEKO 73053

Kawahara, Yoshihisa

Search repository
権利
権利情報 © 2013. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
抄録
内容記述 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.
内容記述タイプ Abstract
出版者
出版者 Elsevier
言語
言語 eng
資源タイプ
資源タイプresource http://purl.org/coar/resource_type/c_6501
タイプ journal article
ISSN
収録物識別子タイプ ISSN
収録物識別子 0022-1694
書誌情報 Journal of Hydrology

巻 486, p. 71-87, 発行日 2013-04
著者版フラグ
値 author
URI
識別子 https://doi.org/10.1016/j.jhydrol.2013.01.042
識別子タイプ DOI
URI
識別子 http://hdl.handle.net/2237/26873
識別子タイプ HDL
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