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The Drain Channel must be built to accommodate the maximum flow through all the drain valves of the flocculation tank and sedimentation tank. This is calculated as:

{latex}
\large
$$
Q_{DChannel}  = \sum {Q_{SedValves}  + \sum {Q_{FlocValves} } }
$$
{latex}

Design Assumptions

Geometric constraints used in the design come from some basic assumptions. The depth of the drain channel at the beginning of the flocculator is equal to one half the head loss at the opposite end of the drain channel. Also, we will over-design the channel by calculating the height the cross-section as if it were a rectangle and then adding the triangular bottom, based on a user determined channel width.

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