SIDE CHANNEL SPILLWAY

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SIDE CHANNEL SPILLWAY



The side channel spillway is one in which the control weir is placed along the side of and approximately parallel to the upper portion of the spillway discharge channel flow over the crest falls into the narrow trough opposite the weir, turns an approximate right angle, and then continues into the main discharge channel.

The side channel design is concerned only with the hydraulic action in the upstream reach of the discharge channel and is more or less independent of the details selected for the other spillway components. Discharge characteristics of side channel spillway are similar to those of an ordinary overflow and are dependent on the selected profile of the weir crest. However, for maximum discharges the side channel flow may differ from that of the overflow spillway.


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