The Bival Canal Control System application to the Sahel Canal operated by the Office du Niger (Mali).
1992
Sauvagere J.P.
The BIVAL system is a level regulation system of the downstream control type. This allows an approximately constant volume of water to be maintained in the controlled canal reach, regardless of the canal flow condition. The volume of water in the reach is associated with a theoretical point located more or less in the middle of the reach and around which oscillate the various stream lines corresponding to different flow conditions. The level of the theoretical point (representative of the volume) is calculated using a simple linear expression between the upstream and downstream levels in the reach. The level is controlled by slaving the water intake gates to the elevation of the water surface calculated at the theoretical point. In practice, the control parameters (set level, decrement, gate opening increment, weighing coefficient and time step) are adjusted by means of a computer simulation model.
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