In order to reduce overflow pollution load during rainfall, a real time control strategy has been implemented for the combined sewer network of Saverne (Alsace, France). It consists of optimizing various gate and pump commands over a specified prediction horizon, using graph theory. Flows, trough collectors, weirs and stormwater retention tanks have been represented by a graph and a primal-dual algorithm has been used in order to satisfy rainfall discharge with lower overflow. This strategy has been tested successfully using 685 rainfall events collected over a decade and attractive reductions of both volume and frequency overflows have been observed.
Real time control of a combined sewer network using graph theory
J. Vazquez, D. Bellefleur, D. Gilbert, B. Grandjean; Real time control of a combined sewer network using graph theory. Water Sci Technol 1 September 1997; 36 (5): 301–308. doi: https://doi.org/10.2166/wst.1997.0223
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