A single pipe of length 1500 m and diameter 60 cm connects two reservoirs having a difference of 20 m in their water levels. The pipe is to be replaced by two pipes of the same length and equal diameter d to convey 25%

A 3.5-cm-diameter pipe leaves a reservoir of surface elevation 80 m and drops to elevation 47 m, where it terminates into the atmosphere through a 1-cm-diameter nozzle. If the total head lost through the pipe and nozzle is 5 m, calculate the flowrate in m3/s

Problem 2: Fluid flows through a 20-mm diameter pipe, 150 m long at a Reynolds number of 1,750. Calculate the discharge if the head lost is 175 m.

A confined aquifer has a transmissivity, T, of 30 m2/day and a storage coefficient, S, of 0.0008. A production well of radius, r, 0.2 m is pumped at 200 litres/min for 4 days and shut off. Calculate the maximum drawdown and the drawdown 10 days after the start of pumping at the well. Note: Calculate the result rounded to the second digit after the decimal point. Hint: Cooper-Jacobs Solution is valid for u<0.01: In 2.25Tt p2 S S = 47T