A pipe has a total length of 9800 ft with diameter of 30 in., and its thickness is 5/8 in. Assume that Er = 30 x 10° psi, and Eg = 300,000 psi. If the initial velocity for steady flow is 8 ft/s and a valve near the end of the pipe is partially closed so as to reduce the flow to half of the initial velocity in 3 seconds, (a) What is the wave celerity (ft/s), and (b) find the maximum pressure rise (psi) from the water hammer.

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Storm Sewers and Detention

The storm drains system transports rainwater or stormwater and other runoff from roads, parking lots, and roof downpipes directly to nearby creeks, rivers, or the sea without any treatment.