Experimental study of stage-discharge relationships for flows over radial gates and flap gates

Delattre, Laurent;Zech, Yves;Dierickx, Philippe;Soares Frazao, Sandra
(2013) International Workshop on Hydraulic Design of Low-Head Structures (IWLHS 2013) — Location: FH Aachen University of Applied Sciences Bayernallee 9, Aachen/Germany (2013.February.20AD)

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Abstract
Floods forecasting and management of large regulated rivers require the ability to properly combine classical flow routing with the regulation dams that act as internal boundaries. Therefore a good knowledge of the stage-discharge relationships of these dams is mandatory. The Meuse River in Belgium is such a regulated river, for which the HYDROAXE software was developed jointly by the Belgian Min-istry of Public Works (SPW-SETHY) and the Hydraulics Laboratory of the Université catholique de Lou-vain (Belgium). Working for a constant improvement of this software, this paper presents an experimental study of flow over a typical dam of the River Meuse, i.e. a dam controlled by radial gates equipped with flap gates. Measurements of the upstream water level and of the discharge are presented for different positions of the flap gate. According to earlier works on gates featuring a variable inclination, mainly drum gates, it is observed that the stage-discharge relationship depends on the inclination of the flap. However, the theoretical discharge coefficient obtained by means of formulae of the literature always exceeds the measured discharge coefficient. This suggests that further work is required to obtain a stage-discharge relationship adapted to the particular case of radial gates equipped with flap gates.
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Delattre, L., Zech, Y., & Soares Frazao, S. (2013). Experimental study of stage-discharge relationships for flows over radial gates and flap gates. In Bung, D ; Pagliara, S (Eds.) (ed.), Proceedings of International Workshop on Hydraulic Design of Low-Head Structures, IAHR, 20-22 Feb (p. p. 33-42). Bundesanstalt für Wasserbau (BAW). https://hdl.handle.net/2078.5/221391