Assignment #4 Hydraulic Devices
1. Find the discharge, Q, through a 15-inch-diameter orifice in a vertical wall impounding water at
a depth of 7.5 feet above the center of the orifice. The orifice has square edges and discharges
freely.
2. An artificial lake is impounded by an earth dam with a square-edged orifice 12 inches by 12
inches for drawdown. The elevation of the surface of the lake is 928.75, and the invert of the
orifice is 905.25. When the orifice is opened, what discharge in cfs flows through into the stream
below the dam?
3. Find the discharge over the rectangular, sharp-crested weir shown below.
4. Find the discharge over the rectangular, two-stage weir shown below if the breadth of each
crest is 2.00 feet.
5. A concrete pipe is used to help divert a stream to allow repairs to a dam as shown below. The
pipe has a diameter of 15.0 feet and a finished surface. What is the discharge in the pipe?
