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Hydrology and Earth System Sciences An interactive open-access journal of the European Geosciences Union
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Discussion papers | Copyright
https://doi.org/10.5194/hess-2018-413
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 24 Aug 2018

Research article | 24 Aug 2018

Review status
This discussion paper is a preprint. It has been under review for the journal Hydrology and Earth System Sciences (HESS). The manuscript was not accepted for further review after discussion.

Influence of measurement errors on the results of the Brutsaert–Nieber analysis of flow recession curves

Jacek Kurnatowski Jacek Kurnatowski
  • Department of Hydroengineering, West Pomeranian University of Technology in Szczecin, Al. Piastów 50, 70-311 Szczecin, Poland

Abstract. The classic analysis of river flow recession hydrographs Q(t) developed by Brutsaert and Nieber (1977) leads to the graphical representation of the relation ln(−dQ/dt) = ln[f(Q)] in a form of scattered points cloud. The paper presents the analysis of measurement errors of river flow values as one of possible factors generating this dispersion. The relevant numerical experiment shows the high similarity between the set of points obtained as a classic analysis result and the experiment output. It has been proved that constant time steps between consecutive flow measurements subject to random errors generate a systematic error of the analysis results and should be replaced by intervals of variable duration, resulting from the condition of constant stage/depth decrements.

Jacek Kurnatowski
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AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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Interactive discussion
Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement
Jacek Kurnatowski
Jacek Kurnatowski
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Short summary
The classic analysis of river flow recession curves Q(t) developed by Brutsaert and Nieber (1977) leads to the graphical representation of the relation ln(−dQ/dt) = ln[f(Q)] in a form of scattered points cloud. The paper presents the analysis of measurement errors of river flow values as one of possible factors generating this dispersion. The relevant numerical experiment has been performed. Finally, the principles of field measurements aiming towards reduction of this scattering are given.
The classic analysis of river flow recession curves Q(t) developed by Brutsaert and Nieber...
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