HYDRODYNAMIC INTERPOLATION METHOD OF SUBMERGED RIVER BED TOPOGRAPHY FOR LASER SCANNING SURVEY

• UCHIDA Tatsuhiko

  広島大学

• KAWAHARA Yoshihisa

  広島大学

• YOSHIDA Susumu

  広島大学

• MORIYAMA Manabu

  復建調査設計株式会社

Bibliographic Information

Other Title

• 河川レーザ測量のための水面下河床高の力学的内挿補間法

Abstract

Recently 3D laser scanner systems have been widely and effectively used to measure the physical environment of river. However, it is still very difficult to obtain submerged river bed topography. To overcome this problem, this paper proposes a new and practical method to interpolate the submerged bed elevation to compensate for the weak points of laser systems. First, we obtain the detailed bed data in an experimental channel by a laser scanner system. The performance of a geometric interpolation method using bed elevation and its gradient at water edges is discussed. Then we show the significance of water surface profile in estimating river bed profile through the comparisons between the interpolated and the measured data. And we formulate a new hydrodynamic interpolation method of river bed topography under water surface using water surface profile. The hydrodynamically interpolated submerged bed river shape is found to show good agreement with the measured data.

Journal

• PROCEEDINGS OF HYDRAULIC ENGINEERING

  PROCEEDINGS OF HYDRAULIC ENGINEERING 52 1057-1062, 2008

  Japan Society of Civil Engineers

Keywords

• laser scanner
• ground data
• submerged river bed topography
• water surface
• geometric interpolation method
• hydrodynamic interpolation method
• 2D numerical analysis

Details

• CRID: 1390001205171911168
• NII Article ID: 130004043933
• DOI: 10.2208/prohe.52.1057
• ISSN: 18849172
• ISSN: 09167374
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed