Problem 7 - 73 A water district which serves a suburban community needs a new water transmission main which will supply the area from an existing reservoir. The line will be 5.3 miles long. The reservoir elevation is +280 feet, and the town elevation at point of discharge is +100 feet. No pumping will be provided, and the water will be delivered to a non-pressurized storage tank in town. The proposal is to build a single line of new smooth clean cast iron pipe. Darcy "f" is assumed to be 0.021. The present demand is 1 MGD. (a) Determine the minimum diameter pipe that could be used. Ans: 8.7" (b) Determine the commercial size of pipe that would fulfill the need of the system? Ans: 10" (c) Determine the value of the Manning's n which would apply to this particular installation. Ans: 0.0103
Problem 7 - 73 A water district which serves a suburban community needs a new water transmission main which will supply the area from an existing reservoir. The line will be 5.3 miles long. The reservoir elevation is +280 feet, and the town elevation at point of discharge is +100 feet. No pumping will be provided, and the water will be delivered to a non-pressurized storage tank in town. The proposal is to build a single line of new smooth clean cast iron pipe. Darcy "f" is assumed to be 0.021. The present demand is 1 MGD. (a) Determine the minimum diameter pipe that could be used. Ans: 8.7" (b) Determine the commercial size of pipe that would fulfill the need of the system? Ans: 10" (c) Determine the value of the Manning's n which would apply to this particular installation. Ans: 0.0103
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:Problem 7 - 73
A water district which serves a suburban community needs a new water
transmission main which will supply the area from an existing reservoir. The
line will be 5.3 miles long.
The reservoir elevation is +280 feet, and the town elevation at point of
discharge is +100 feet. No pumping will be provided, and the water will be
delivered to a non-pressurized storage tank in town.
The proposal is to build a single line of new smooth clean cast iron pipe.
Darcy "f" is assumed to be 0.021. The present demand is 1 MGD.
(a) Determine the minimum diameter pipe that could be used.
Ans: 8.7"
(b) Determine the commercial size of pipe that would fulfill the need of the
system?
Ans: 10"
(c) Determine the value of the Manning's n which would apply to this
particular installation.
Ans: 0.0103
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