A 450 mm diameter culvert has been designed to convey a discharge of Q = 0.55 m3/s of storm-water under a residential road. The culvert is 37.5 m long and has a slope of 1.3%. The downstream flow depth was obtained as 0.35 m from a hydraulic analysis. You are required to determine:1.1 the head required to convey the discharge through the culvert at full flow conditions;(a) If concrete pipe is used with a Manning’s roughness coefficient of n = 0.0155 with an inlet headwall of socket type. (b) If corrugated steel pipe is used with a Manning’s roughness coefficient n=0.024 with an inlet headwall of square edge design.  1.2 What is the corresponding headwater depth in 1.1 (a) and (b) above?

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
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Chapter2: Loads On Structures
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A 450 mm diameter culvert has been designed to convey a discharge of Q = 0.55 m3
/s of 
storm-water under a residential road. The culvert is 37.5 m long and has a slope of 1.3%. The 
downstream flow depth was obtained as 0.35 m from a hydraulic analysis. You are required 
to determine:
1.1 the head required to convey the discharge through the culvert at full flow conditions;
(a) If concrete pipe is used with a Manning’s roughness coefficient of n = 0.0155 with an 
inlet headwall of socket type. 
(b) If corrugated steel pipe is used with a Manning’s roughness coefficient n=0.024 with 
an inlet headwall of square edge design. 
 1.2 What is the corresponding headwater depth in 1.1 (a) and (b) above?

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