Channel and bed configurations on bed with non-cohesive and cohesive materials

• Project/Area Number: 20760331
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Hydraulic engineering
• Research Institution: Kyoto University
• Principal Investigator: TAKEBAYASHI Hiroshi Kyoto University, 防災研究所, 准教授 (70325249)
• Project Period (FY): 2008 – 2010
• Project Status: Completed (Fiscal Year 2010)
• Budget Amount: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000); Fiscal Year 2010: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2009: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000); Fiscal Year 2008: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
• Keywords: 粘着性土 / 流路形態 / 河床形態 / 流砂 / 数値解析 / 非粘着性土 / 蛇行流路 / 網状流路 / 植生 / 河床変動解析

Research Abstract

Erosion characteristics of cohesive material bed by non-cohesive material is clarified by flume tests and the relationship between sediment size distribution and bed hardness is verified by field observation. Furthermore, effect of cohesive characteristics on geometric and migration characteristics of channel and bed configurations is discussed. Finally, the bed deformation model with vegetation dynamic states was developed.

Research Products

• [Journal Article] Characteristics of bed deformation and size distribution of bed material at Chaktomuk in Cambodia (2010)
  • Author(s): Hiroshi Takebayashi, Shinji Tsukawaki, Im Sim, Touch Sambath, Sieng Sotham
  • Journal Title: River Sedimentation Vol.11, CD-ROM版
  • Peer Reviewed
• [Journal Article] Effect of temporal change of sediment supply conditions on bed geometry of braided channels in Tagliamento River (2010)
  • Author(s): Hiroshi Takebayashi, Masaharu Fujita, Tetsuya Tamaki
  • Journal Title: Proceedings of International Symposium on Ecohydraulics Vol.8, CD-ROM版
  • Peer Reviewed
• [Journal Article] Numerical analysis of bank erosion process along bank composed of both cohesive and non-cohesive layers (2010)
  • Author(s): Hiroshi Takebayashi, Masaharu Fujita, Puji Harsanto
  • Journal Title: International Workshop on Multimodal Sediment Disasters Triggered by Heavy Rainfall and Earthquake and The Countermeasures Pages: 77-86
  • Peer Reviewed
• [Journal Article] Sediment transport and bed deformation characteristics on layers composed of rocks or cohesive material (2010)
  • Author(s): Hiroshi Takebayashi, Takuya Nakamoto, Masaharu Fujita
  • Journal Title: Proceedings of IAHR-APD Conference Vol.17, CD-ROM版
  • Peer Reviewed
• [Journal Article] Characteristics of bed deformation and size distribution of bed material at Chaktomuk in Cambodia (2010)
  • Author(s): Hiroshi Takebayashi, Shinji Tsukawaki, Im Sim, Touch Sambath, Sieng Sotham
  • Journal Title: River Sedimentation Volume: 11(CD-ROM版)
  • Peer Reviewed
• [Journal Article] Effect of temporal change of sediment supply conditions on bed geometry of braided channels in Tagliamento River (2010)
  • Author(s): Hiroshi Takebayashi, Masaharu Fujita, Tetsuya Tamaki
  • Journal Title: Proceedings of International Symposium on Ecohydraulics Volume: 8(CD-ROM版)
  • Peer Reviewed
• [Journal Article] SEDIMENT TRANSPORT AND BED DEFORMATION CHARACTERISTICS ON LAYERS COMPOSED OF ROCKS OR COHESIVE MATERIAL (2010)
  • Author(s): H.Takebayashi, T.Nakamoto, soon
  • Journal Title: IAHR-APD2010 Conference Proceedings 17(CD-ROM版)
  • Peer Reviewed
• [Journal Article] Numerical Analysis of Bank Erosion Process Along Banks Composed of Both Cohesive and Non-Cohesive Layers (2010)
  • Author(s): H.Takebayashi, M.Fujita, soon
  • Journal Title: Proceedings of International workshop on MSD 1 Pages: 45-54
  • Peer Reviewed
• [Journal Article] Braided streams with vegetation presence under unsteady flow, Water Management (2009)
  • Author(s): Hiroshi Takebayashi, Takeshi Okabe
  • Journal Title: Institution of Civil Engineers, Thomas Telford Publishing Volume 162, Issue 3 Pages: 189-198
  • Peer Reviewed
• [Journal Article] 河道内樹木の流失限界 に関する水理実験及び河床変動解析モデルの適用 (2009)
  • Author(s): 桑原正人, 竹林洋史, 岡部健士, 浅見ユリ子, 森下佑
  • Journal Title: 河川技術論文集 第15巻 Pages: 159-164
  • Peer Reviewed
• [Journal Article] EFFECT OF PARTIAL REMOVAL OF VEGETATION ON FLOW AND BED DEFORMATION IN A WEAKLY MEANDERING CHANNEL (2009)
  • Author(s): Hiroshi Takebayashi
  • Journal Title: Proceedings of Environmental and Water Resourses
  • Peer Reviewed
• [Journal Article] Instability of stream geometry (2008)
  • Author(s): Hiroshi Takebayashi
  • Journal Title: Proceedings of International Conference on Scour and Erosion, JGC Vol.4 Pages: 134-139
  • Peer Reviewed
• [Presentation] 岩・粘着性土が河床に存在する場における流砂・河床変動特性 (2010)
  • Author(s): 竹林洋史, 中元達也, 藤田正治
  • Organizer: 砂防学会
  • Place of Presentation: 広島
  • Year and Date: 2010-05-27
• [Presentation] Numerical analysis of bank erosion process along bank composed of both cohesive and non-cohesive layers (2010)
  • Author(s): Hiroshi Takebayashi, Masaharu Fujita, Puji Harsanto
  • Organizer: International Workshop on Multimodal Sediment Disasters Triggered by Heavy Rainfall and Earthquake and The Countermeasures
  • Place of Presentation: Jogjakarta, Indonesia
  • Year and Date: 2010-03-09
• [Presentation] Masaharu Fujita and Tetsuya Tamaki : Effect of temporal change of sediment supply conditions on bed geometry of braided channels in Tagliamento River (2010)
  • Author(s): Hiroshi Takebayashi
  • Organizer: International Symposium on Ecohydraulics
  • Place of Presentation: Seoul, Korea
• [Presentation] Characteristics of bed deformation and size distribution of bed material at Chaktomuk in Cambodia (2010)
  • Author(s): Hiroshi Takebayashi, Shinji Tsukawaki, Im Sim, Touch Sambath, Sieng Sotham
  • Organizer: River Sedimentation, Stellenbosch
  • Place of Presentation: South Africa
• [Presentation] 粘着性・非粘着性河床材料混在場における土砂輸送特性 (2009)
  • Author(s): 竹林洋史, 中元達也, 藤田正治
  • Organizer: 京都大学防災研究所研究発表会
  • Place of Presentation: 京都
  • Year and Date: 2009-02-24
• [Presentation] 河道内樹木の流失限界に関する水理実験及び河床変動解析モデルの適用 (2009)
  • Author(s): 桑原正人, 竹林洋史, 岡部健士, 浅見ユリ子, 森下佑
  • Organizer: 第15回河川シンポジウム
  • Place of Presentation: 東京
• [Presentation] Instability of stream geometry (2008)
  • Author(s): Hiroshi Takebayashi
  • Organizer: Proceedings of International Conference on Scour and Erosion
  • Place of Presentation: 4^<th> JGC, Tokyo
• [Remarks] ホームページ等