Q4. A siphon spillway, as shown in Figure 1, is 200 ft long with a diameter of 2 ft. 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 (f = 0.02) siphon are evenly distributed throughout its length. If the summit of the siphon is 5 ft above the upper reservoir and 60 ft from the siphon entrance, is cavitation a concern?

Fig: 1

Fig: 2