Spatial interpolation of point velocities in stream cross-section

Abstract

The most frequently used instrument for measuring velocity distribution in the cross-section of small rivers is the propeller-type current meter. Output of measuring using this instrument is point data of a tiny bulk. Spatial interpolation of measured data should produce a dense velocity profile, which is not available from the measuring itself. This paper describes the preparation of interpolation models.

Keywords

• open channel
• current meter
• cross-validation
• arithmetic mean
• inverse distance weighted
• thin-plate spline
• kriging