A siphon spillway, as shown in Figure P4.2.3, is 200 feet long with a diameter of 2 feet. It is used to discharge water (68°F) to a downstream reservoir 50 ft below the upstream reservoir. The friction losses in the rough concrete siphon are evenly distributed throughout its length. If the summit of the siphon is 5 feet above the upper reservoir and 60 feet from the siphon entrance, is cavitation a concern?

Figure P4.2.3

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15 ft 60 ft