EFFECTS OF SAND-COVERING TO GRAVEL BEDS WITH LOW-FLOW CHANNEL ON GRAVEL MOBILIZATION AND CHANNEL EVOLUTION

• KUBO Shuhei

  鳥取大学大学院持続性社会創生科学研究科 工学専攻

• MIWA Hiroshi

  鳥取大学 学術研究院工学系部門

• FUJITA Gaku

  株式会社山田工務店土木部

• WADA Takashi

  鳥取大学 学術研究院工学系部門

Bibliographic Information

Other Title

• 粗粒化した礫河床における礫の移動と流路変動に及ぼす覆砂の効果

Abstract

 Gravel beds formation in rivers downstream of dams may cause several issues such as a bed degradation and a channel immobilization. Many works have been conducted in order to make restoration of such rivers. On the ohter hand, when fine sediment (i.e., sand) is present in streambeds composed of gravels, the gravel can be more easily removed as compared with gravel beds without fine sediment. This phenomenon may indicate that the sediment augmentation to gravel beds using fine sediment is a viable alternative to mobilizing coarse surface layers. In this study, we investigated the effects of sand-covering to gravel beds with low-flow channel on gravel mobilization and channel evolution. The temporal variations in low-flow channel were examined by means of flume experiments. And the effects of sand-covering thickness on the channel width and depth was discusssed.

Journal

• Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)

  Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering) 77 (2), I_733-I_738, 2021

  Japan Society of Civil Engineers

Keywords

• gravel-bed
• sand-covering
• gravel mobilization
• low-flow channel evolution
• width and depth

Details

• CRID: 1390572590023368320
• NII Article ID: 130008160217
• DOI: 10.2208/jscejhe.77.2_i_733
• ISSN: 2185467X
• Web Site: https://www.jstage.jst.go.jp/article/jscejhe/77/2/77_I_733/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed