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BaRatin-SFD, analyse bayésienne des courbes de tarage à double échelle et de leurs incertitudes

Abstract : 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
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V. Mansanarez, R. Le Boursicaud, J. Le Coz, Benjamin Renard, M. Lang, et al.. BaRatin-SFD, analyse bayésienne des courbes de tarage à double échelle et de leurs incertitudes. La Houille Blanche - Revue internationale de l'eau, EDP Sciences, 2017, 2017 (5), pp.22-28. ⟨10.1051/lhb/2017040⟩. ⟨hal-01768419⟩



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