a) A pipeline is needed to drain water away from a hypermarket car park which regularly gets flooded during even moderate rainfall. The current drainage system starts to fail at a rate of 5m³/s and it is estimated that a drainage rate of at least 15m³/s is needed so that flooding would only occur once every ten years. The drain has fall of 2m over a length of 200m. Estimate the smallest pipe diameter which would clear the water where the head available at the start of the drain is 1.5m. Assume that the Darcey Weisbach friction coefficient would be 0.012 b) An alternative suggestion for the drainage is to replace the pipe with an open channel of width 2m which would have the same slope as the pipe and made of smooth concrete with a Manning friction value of 0.12 c) Compare the open channel with the pipe system for providing the required drainage

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
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Task 2 Calculate forces related to fluids at rest and in motion
a) A pipeline is needed to drain water away from a hypermarket car park which regularly gets
flooded during even moderate rainfall. The current drainage system starts to fail at a rate
of 5m³/s and it is estimated that a drainage rate of at least 15m³/s is needed so that
flooding would only occur once every ten years. The drain has fall of 2m over a length of
200m. Estimate the smallest pipe diameter which would clear the water where the head
available at the start of the drain is 1.5m. Assume that the Darcey Weisbach friction
coefficient would be 0.012
b) An alternative suggestion for the drainage is to replace the pipe with an open channel of
width 2m which would have the same slope as the pipe and made of smooth concrete with
a Manning friction value of 0.12
c) Compare the open channel with the pipe system for providing the required drainage
Transcribed Image Text:Task 2 Calculate forces related to fluids at rest and in motion a) A pipeline is needed to drain water away from a hypermarket car park which regularly gets flooded during even moderate rainfall. The current drainage system starts to fail at a rate of 5m³/s and it is estimated that a drainage rate of at least 15m³/s is needed so that flooding would only occur once every ten years. The drain has fall of 2m over a length of 200m. Estimate the smallest pipe diameter which would clear the water where the head available at the start of the drain is 1.5m. Assume that the Darcey Weisbach friction coefficient would be 0.012 b) An alternative suggestion for the drainage is to replace the pipe with an open channel of width 2m which would have the same slope as the pipe and made of smooth concrete with a Manning friction value of 0.12 c) Compare the open channel with the pipe system for providing the required drainage
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