Example 124 Velocity by Flow and Channel Dimensions

This calculation can be used for a single channel or tank or multiple channels or tanks with the same dimensions and equal flow. If the flows through each unit of the unit dimensions are unequal, the velocity for each channel or tank must be computed individually.

3 No. of Channels x Channel Width (ft) x Water Depth (ft)

Problem: The plant is currently using two grit channels. Each channel is 3 ft wide and has a water depth of 1.2 ft. What is the velocity when the influent flow rate is 3.0 MGD?

Solution:

Note: The channel dimensions must always be in feet; convert inches to feet by dividing by 12 inches per foot.

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