Troughs are 30ft long and width is 20% less than it length and one fourth of length is the measure to the center with horizontal flat bottom. The backwash rate is 24 in/min. Estimate (1) water depth of the troughs with free flow into the gullet, and (2) the distance between the top of the troughs and the 30-in sand bed. Assuming 40% expansion and 6in in free board in the troughs and 8 in of thickness.

Structural Analysis
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ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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Troughs are 30ft long and width is 20% less than it length and one fourth of length is the measure to the center with horizontal flat bottom. The backwash rate is 24 in/min. Estimate (1) water depth of the troughs with free flow into the gullet, and (2) the distance between the top of the troughs and the 30-in sand bed. Assuming 40% expansion and 6in in free board in the troughs and 8 in of thickness. 

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