Liquid flow measurements in mountainstreams

Dilution method for measurement of unsteady flow using back-into-time Kalman filtering

Master thesis (1991)

Authors

Contributors

M. De Vries (mentor)
H.L. Fontijn (mentor)
Z.B. Wang (mentor)
Department
Hydraulic Engineering (CEG) (TU Delft)
Copyright: © 1991 Vroege, P.
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Published Date

01-08-1991

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Faculty

Civil Engineering and Geosciences

Department

Hydraulic Engineering

Abstract

In steady flow a well known method to determine a discharge is the method of dilution discharge-measurement : after constant injection of a known rate of tracer material and sufficient mixing over the entire cross-section, the concentration of the tracer material can be used to compute the discharge by way of an explicit relation. Using the same relation during a flood wave (unsteady flow) will result in inaccurate values of the discharge caused by a difference in the respective velocities of propagation between flood wave and tracer cloud. When, however, the dispersion equation is solved back into time with the aid of a Kalman filter, it turns out to be possible to compute with the dilution method accurate values of the discharge during a flood wave.

Files

Vroege1991a.pdf
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