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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

A new geophone device for understanding environmental impacts caused by gravel bedload during artificial floods

http://hdl.handle.net/2237/26585
ffce761e-7dd9-4c3d-b7c4-d35035fdb9f6
名前 / ファイル ライセンス アクション
Tsubaki_et_al-2017-Water_Resources_Research.pdf Tsubaki_et_al-2017-Water_Resources_Research.pdf ファイル公開:2017/08/01 (2.6 MB)
Item type 学術雑誌論文 / Journal Article(1)
公開日 2017-06-07
タイトル
タイトル A new geophone device for understanding environmental impacts caused by gravel bedload during artificial floods
著者 Tsubaki, Ryota

× Tsubaki, Ryota

WEKO 72189

Tsubaki, Ryota

Search repository
Kawahara, Yoshihisa

× Kawahara, Yoshihisa

WEKO 72190

Kawahara, Yoshihisa

Search repository
Zhang, Xin-Hua

× Zhang, Xin-Hua

WEKO 72191

Zhang, Xin-Hua

Search repository
Tsuboshita, Kentaro

× Tsuboshita, Kentaro

WEKO 72192

Tsuboshita, Kentaro

Search repository
権利
権利情報 © 2017 American Geophysical Union
抄録
内容記述 To assess the contribution of gravel bedload on the removal of attached-algae and aquatic plants from a cobble-bed river during small floods, we propose a geophone type method for measuring the local bedload of non-uniform sized gravel. Due to limited peak discharge for focused events during our study, a large fraction of bed material (here cobbles) was immobile and only a small fraction of bed material (sand and gravel) was expected to be transported during the flushing flows we analyzed. The device we developed has a size equivalent to immobile bed material and a shape similar to bed material (rounded cobbles) at the site. The instrument's design allows avoidance of disturbances in river bed micro-topography during installation and local bedload transport during floods. A flume experiment was conducted in order to establish an empirical algorithm for estimating the diameter of impacted gravel, and uncertainty related to diameter estimation is discussed. The proposed method was utilized to quantify gravel bedload in a cobble-bed river during flushing flows. We also discuss the contribution of measured gravel bedload during flushing flows on the removal of attached-algae (up to a 37% reduction in chlorophyll-a density) and aquatic plants (a reduction of 38% in dry mass per area). Based on time variation for the measured gravel bedload, we also suggest the propagation of a bed-form composed of the fine sediment fraction migrating on immobile larger sediment and implications for the propagation of the fine sediment wave for attached-algae removal.
内容記述タイプ Abstract
出版者
出版者 Wiley
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 0043-1397
書誌情報 Water Resources Research

巻 53, 号 2, p. 1491-1508, 発行日 2017-02
著者版フラグ
値 publisher
URI
識別子 http://doi.org/10.1002/2016WR019726
識別子タイプ DOI
URI
識別子 http://hdl.handle.net/2237/26585
識別子タイプ HDL
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