Spatial interpolation of point velocities in stream cross-section

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Title:Spatial interpolation of point velocities in stream cross-section
Creators:
Hasníková, Eliška; hasnikova at fzp dot czu dot cz; Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, Praha 6 – Suchdol, 165 21, Czech Republic.
Pavlásek, Jiří; Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, Praha 6 – Suchdol, 165 21, Czech Republic.
Vach, Marek; Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, Praha 6 – Suchdol, 165 21, Czech Republic.
Journal or Publication Title:
Journal of Hydrology and Hydromechanics, 63, 1, pp. 21-28
Uncontrolled Keywords:open channel, current meter, cross-validation, arithmetic mean, inverse distance weighted, thin-plate spline, Kriging

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. Measuring campaign was realized to obtain operational data. It took place on real streams with different velocity distributions. Seven data sets were obtained from four cross-sections varying in the number of measuring points, 24–82. Following methods of interpolation of the data were used in the same context: methods of geometric interpolation arithmetic mean and inverse distance weighted, the method of fitting the trend to the data thin-plate spline and the geostatistical method of ordinary kriging. Calibration of interpolation models carried out in the computational program Scilab is presented. The models were tested with error criteria by cross-validation. Ordinary kriging was proposed to be the most suitable interpolation method, giving the lowest values of used error criteria among the rest of the interpolation methods.

Official URL: http://147.213.145.2/vc/vc1.asp

Title:Spatial interpolation of point velocities in stream cross-section
Translated title:Spatial interpolation of point velocities in stream cross-section
Creators:
Hasníková, Eliška; hasnikova at fzp dot czu dot cz; Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, Praha 6 – Suchdol, 165 21, Czech Republic.
Pavlásek, Jiří; Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, Praha 6 – Suchdol, 165 21, Czech Republic.
Vach, Marek; Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, Praha 6 – Suchdol, 165 21, Czech Republic.
Uncontrolled Keywords:open channel, current meter, cross-validation, arithmetic mean, inverse distance weighted, thin-plate spline, Kriging
Subjects:T Technology > TA Engineering (General). Civil engineering (General)
Divisions:Mathematics, Physics and Earth Sciences > Institute of Hydrodynamics > Journal of Hydrology and Hydromechanics
Journal or Publication Title:Journal of Hydrology and Hydromechanics
Volume:63
Number:1
Page Range:pp. 21-28
ISSN:0042-790X
Publisher:Institute of Hydrology of the Slovak Academy of Sciences and the Institute of Hydrodynamics of the Academy of Sciences of the Czech Republic
Related URLs:
URLURL Type
http://avi.lib.cas.cz/node/55Publisher
ID Code:8407
Item Type:Article
Deposited On:13 May 2015 19:23
Last Modified:13 May 2015 17:23

Citation

Hasníková, Eliška; Pavlásek, Jiří; Vach, Marek (2015) Spatial interpolation of point velocities in stream cross-section. Journal of Hydrology and Hydromechanics, 63 (1). pp. 21-28. ISSN 0042-790X

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