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BaRatin-SFD, Bayesian analysis of rating curves at twin-gauge stations and their uncertainties
Stockholm University, Faculty of Science, Department of Physical Geography. Irstea, UR HHLY, France.
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Number of Authors: 8
2017 (French)In: La houille blanche, ISSN 0018-6368, E-ISSN 1958-5551, no 5, 22-28 p.Article in journal (Refereed) Published
Abstract [fr]

An original hydraulics-based Bayesian method is introduced for developing stage-fall-discharge (SFD) rating curves used at twin-gauge stations and estimating their uncertainties. A channel control with variable energy slope due to variable backwater is considered in combination with a backwater-unaffected control, usually another channel control. Succession between backwater-affected and backwater-unaffected controls is solved based on the continuity of the stage-discharge relation. The difference between the reference levels at the two stations is estimated as another uncertain parameter of the SFD model. Results at one typical twin-gauge station affected by the backwater of a run-of-the-river dam are presented. The accuracy and uncertainty of predicted discharges appear to be acceptable even when the uncertainty of the transition between backwater-affected and backwater-unaffected controls is high.

Place, publisher, year, edition, pages
2017. no 5, 22-28 p.
Keyword [en]
Hydrometry, discharge, rating curve, twin-gauge, variable backwater, Bayesian inference
National Category
Earth and Related Environmental Sciences
Identifiers
URN: urn:nbn:se:su:diva-149867DOI: 10.1051/lhb/2017040ISI: 000414479100004OAI: oai:DiVA.org:su-149867DiVA: diva2:1164675
Available from: 2017-12-11 Created: 2017-12-11 Last updated: 2017-12-11Bibliographically approved

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