EFFECTS OF GROVES AGAINST FLOOD HAZARDS ON DYKE BREACH FLOW AND HYDRODYNAMIC FORCE

• AKIYAMA Juichiro

  Department of Civil and Architectural Engineering, Faculty of Engineering, Kyushu Institute of Technology

• SHIGE-EDA Mirei

  Department of Civil and Architectural Engineering, Faculty of Engineering, Kyushu Institute of Technology

• UDOU Takayuki

  Department of Civil and Architectural Engineering, Graduate School of Engineering, Kyushu Institute of Technology

• YAMAO Masato

  Department of Civil and Architectural Engineering, Graduate School of Engineering, Kyushu Institute of Technology

Bibliographic Information

Other Title

• 水防林が氾濫流の流況に及ぼす影響と減勢効果

Abstract

Effects of the groves against flood hazards on dyke breach flows and the hydrodynamic forces acting on a structure are investigated experimentally. It is found that depending on Froude number at the broken point of the embankment, characteristics (size of tree, density and length of forest zone) of the groves and the distance of groves from the broken point, different type of the flows, namely, submerged outflow,forced hydraulic jump and jump-spray are observed. The regime of the flows is distinguished by the ratio of specific force of the flows to retarding force due to the groves. It is also found that the primary mechanism for reduction of the hydrodynamic forces acting on a structure is due to increase of flow depth downstream of the groves.

Journal

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

  Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering) 67 (4), I_907-I_912, 2011

  Japan Society of Civil Engineers

Keywords

• groves against flood hazards
• dyke breach
• hydraulic jump
• hydrodynamic force

Details

• CRID: 1390001205352446336
• NII Article ID: 130004557697
• DOI: 10.2208/jscejhe.67.i_907
• ISSN: 2185467X
• Text Lang: ja
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed