Agricultural irrigation uses a significant amount of water, and in some regions it has overwhelmed other water needs. Suppose water is drawn from a reservoir and delivered into an irrigation ditch. For most of the length of the ditch, the delivery is through a 10-cm ID pipe, and in the last few meters the pipe diameter is 7 cm. The exit from the pipe is 300 m lower than the pipe inlet. a) Assume that the pipe is frictionless and that the delivery rate is 4000 kg/h. Estimate the required pressure difference between pipe inlet and outlet. How far below the surface of the reservoir is the pipe inlet? b) How would your answer be different if the pipe were not smooth? Explain
Agricultural irrigation uses a significant amount of water, and in some regions it has overwhelmed other water needs. Suppose water is drawn from a reservoir and delivered into an irrigation ditch. For most of the length of the ditch, the delivery is through a 10-cm ID pipe, and in the last few meters the pipe diameter is 7 cm. The exit from the pipe is 300 m lower than the pipe inlet. a) Assume that the pipe is frictionless and that the delivery rate is 4000 kg/h. Estimate the required pressure difference between pipe inlet and outlet. How far below the surface of the reservoir is the pipe inlet? b) How would your answer be different if the pipe were not smooth? Explain
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Agricultural irrigation uses a significant amount of water, and in some regions it has
overwhelmed other water needs. Suppose water is drawn from a reservoir and delivered into
an irrigation ditch. For most of the length of the ditch, the delivery is through a 10-cm ID
pipe, and in the last few meters the pipe diameter is 7 cm. The exit from the pipe is 300 m
lower than the pipe inlet.
a) Assume that the pipe is frictionless and that the delivery rate is 4000 kg/h. Estimate the
required pressure difference between pipe inlet and outlet. How far below the surface of
the reservoir is the pipe inlet?
b) How would your answer be different if the pipe were not smooth? Explain.
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