FREE-SURFACE BEHAVIOR OF RIVER SURFACE FLOW USING VIDEO IMAGES SHOT FROM RIVERBANK

• TANI Kojiro

  神戸大学工学部大学院工学研究科

• FUJITA Ichiro

  神戸大学大学院 工学研究科

Bibliographic Information

Other Title

• 河岸から撮影された動画像を用いた実河川の自由水面挙動に関する研究

Abstract

 For establishing non-intrusive techniques for river surface flow measurements, video images shot from riverbank by a river monitoring camera have been paid attention in the past decades and the image analysis techniques such as LSPIV or STIV have been developed. Although these image-based techniques assume that water surface textures are advected with the surface flow, this assumption may fail when the effect to surface waves becomes more predominant. In order to improve the measurement accuracy of STIV, the wavenumber frequency analysis of space-time images were conducted, with success of separating the effect of turbulence-generated ripples moving with the surface flow from those generated by free-surface waves.

Journal

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

  Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering) 74 (4), I_805-I_810, 2018

  Japan Society of Civil Engineers

Keywords

• free-surface behavior
• turbulence
• STIV
• wavenumber-frequency analysis

Details

• CRID: 1390001288142453632
• NII Article ID: 130007628276
• DOI: 10.2208/jscejhe.74.i_805
• ISSN: 2185467X
• Web Site: https://www.jstage.jst.go.jp/article/jscejhe/74/4/74_I_805/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed