CORRECTION AND INTERPOLATION OF IRREGULARY MEASURED ADCP DATA AND EXTRACTION OF 3-D FLOW CHARACTER

The procedure of extraction of three-dimensional distribution of velocity field from ADCP measurement data is presented in this study. Cross-sectional velocity distributions have been generally used to indicate three-dimensional feature of flow. However complex flow fields, generated by combination...

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Bibliographic Details
Published inPROCEEDINGS OF HYDRAULIC ENGINEERING Vol. 51; pp. 1063 - 1068
Main Authors TSUBAKI, Ryota, FUJITA, Ichiro, MUTO, Yasunori, YOROZUYA, Atsuhiro
Format Journal Article
LanguageEnglish
Published Japan Society of Civil Engineers 2007
Subjects
3D flow structure
ADCP
data correction
interpolation
river flow measurement
secondary flow
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Summary:The procedure of extraction of three-dimensional distribution of velocity field from ADCP measurement data is presented in this study. Cross-sectional velocity distributions have been generally used to indicate three-dimensional feature of flow. However complex flow fields, generated by combination of a complex bathymetry, curve of the channel and river structure, are difficult to investigate only by using the cross sectional velocity distribution. In this study, anisotropic averaging and interpolation method is introduced to remove random component caused by turbulence of flow and random error of measurement. The continuity correction using pressure equation is also used to reduce both random and system errors. The validity of our procedure is confirmed by using three-dimensional numerical simulation result. Finally, by using our procedure, the complex flow around spur-dikes is explored.
ISSN:0916-7374
1884-9172
DOI:10.2208/prohe.51.1063