1. Kyoto University Research Information Repository
  2. 360　防災研究所
  3. 京都大学防災研究所年報
  4. Vol.60 B
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dc.contributor.author小林, 草平ja
dc.contributor.author角, 哲也ja
dc.contributor.author竹門, 康弘ja
dc.contributor.alternativeKOBAYASHI, Soheien
dc.contributor.alternativeSUMI, Tetsuyaen
dc.contributor.alternativeTAKEMON, Yasuhiroen
dc.date.accessioned2018-02-23T00:18:37Z-
dc.date.available2018-02-23T00:18:37Z-
dc.date.issued2017-09-
dc.identifier.issn0386-412X-
dc.identifier.urihttp://hdl.handle.net/2433/229353-
dc.description.abstractWe measured riverbed topography in the upstream and downstream reaches of Asahi and Koshibu dams with sediment bypass tunnel (SBT) using drone. Aerial photos of a gravel-bar were taken with >70% overlap between images, which were analyzed to generate DEM data by a stereo photogrammetry. Bed profiles were longitudinally smooth in upstream reaches with natural sediment supply, while they were rough with irregular and step-like forms in the downstream reaches with least sediment supply. Riffles were cross-sectionally flat in the upstream reaches, while they were incised in the downstream reaches. In contrast, pools were cross-sectionally confined in the upstream reaches, while they were relatively flat in the downstream reaches. These differences in topography can be explained by gravel-bar shape that varies according to sediment condition. Drone and image analysis are suggested to be an effective and time-saving method to evaluated changes in gravel-bar topography and related flow patterns.en
dc.format.mimetypeapplication/pdf-
dc.language.isojpn-
dc.publisher京都大学防災研究所ja
dc.publisher.alternativeDisaster Prevention Research Institute, Kyoto Universityen
dc.subjectドローンja
dc.subject写真測量ja
dc.subject瀬淵構造ja
dc.subject河床形状ja
dc.subject土砂ja
dc.subjectdroneen
dc.subjectstereo photogrammetryen
dc.subjectpool-riffleen
dc.subjectbed profileen
dc.subjectsedimenten
dc.subject.ndc519.9-
dc.title河川における土砂環境と砂州地形特性--排砂バイパスダムの上下流区間における調査事例--ja
dc.title.alternativeSediment Conditions and Gravel-Bar Characteristics in River Channels : Field Surveys in Reaches of Dams with Sediment Bypass Tunnelen
dc.typedepartmental bulletin paper-
dc.type.niitypeDepartmental Bulletin Paper-
dc.identifier.ncidAN00027784-
dc.identifier.jtitle京都大学防災研究所年報. Bja
dc.identifier.volume60-
dc.identifier.issueB-
dc.identifier.spage765-
dc.identifier.epage774-
dc.textversionpublisher-
dc.sortkey45-
dc.relation.urlhttp://www.dpri.kyoto-u.ac.jp/publications/nenpo/-
dcterms.accessRightsopen access-
dc.identifier.pissn0386-412X-
dc.identifier.jtitle-alternativeDisaster Prevention Research Institute Annuals. Ben
出現コレクション:Vol.60 B

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