ACCURACY VALIDATION OF PLANAR RIVER BED SURVEY USING AIRBORNE LASER BATHYMETRY AND EXAMINATION OF THE IMPROVEMENT EFFECT ON RIVER FLOW ANALYSIS

DOI Web Site Web Site

Bibliographic Information

Other Title
  • ALBを用いた河道地形計測の精度検証と流況解析の改善効果の検討
  • ALB オ モチイタ カドウ チケイ ケイソク ノ セイド ケンショウ ト リュウキョウ カイセキ ノ カイゼン コウカ ノ ケントウ

Search this article

Abstract

 Information of river channel morphology is the key data fundamental to tasks for river planning and management. Airborne Laser Bathymetry (ALB) using a green laser is an effective surveying technology for measuring the detailed planar river morphology including submerged river bed. For this study, we examined the accuracy of the ALB system within a 6 km-long section of the lower Asahi River, by comparing the ALB data of 2 m horizontal resolution with results of the conventional river surveying method. We also evaluated the effect of use of the high-resolution river morphology in river flow analysis. Resultantly, it was confirmed that the ALB system is able to reproduce the cross-sectional river bed profile at least with an accuracy of several tens of centimeters. Additionally, the results of flow analysis showed that the characteristic flow pattern was calculated reasonably using the ALB data, dependent on the river bed shape around sand bars found in the targeted river section.

Journal

Related Projects

See more

Keywords

Details 詳細情報について

Report a problem

Back to top