6.3. The outlet works for a reservoir include both a pipe through the embankment and a spillway. The spillway is 10.0 m (32.8 ft) wide (L) and the discharge is given by the weir equation Q = 0.40V2g Lh3/2 The outlet pipe is 1.0 m (3.28 ft) in diameter with a total length of 75 m (246 ft). The Manning "n" value for the outlet pipe is 0.024 with a minor loss coefficient totaling 28 (entrance loss 0.8, bend loss 1.0, and exit loss 1.0). Assume the tailwater elevation remains below the top of pipe for the range in discharge rates expected. The water surface area in the reservoir is listed below. the reservoir at the start of the storm is 310.0 m (1,016.8 ft). Discharge Time cms Route the following hydrograph through the reservoir. The water surface elevations Discharge Time hrs cfs cms hrs cfs Elevation Reservoir area m ft ha ac 0 05 1.0 1.5 20 25 3.0 3.5 4.0 0 8 30 100 170 165 155 140 120 0 282 1,059 3,530 6,000 5,824 5,472 4,942 4,236 4.5 5.0 5.5 6.0 6.5 7.0 7.5 8.0 8.5 100 80 65 50 35 20 10 5 0 3,530 2,824 2,294 1,765 1,236 706 353 176 0 1,016.8 1,023.7 310 312 315 316 317 318 319 320 1,033.2 1,036.5 1,039.8 1,043.0 1.046.3 1,049.6 20 30 50 60 75 95 120 150 49.4 74.1 123.6 148.3 185.3 234.7 296.5 370.6 Ranta tha fall._ n 5 m (16.4') El. = 300.0 (984.0 ft) 10 m S = 0.005 (32.8') Gm . 65 m (213.2) 299.67m (982.92 ft) 6.3. The outlet works for a reservoir include both a pipe through the embankment and a spillway. The spillway is 10.0 m (32.8 ft) wide (L) and the discharge is given by the weir equation Q = 0.40V2g Lh3/2 The outlet pipe is 1.0 m (3.28 ft) in diameter with a total length of 75 m (246 ft). The Manning "n" value for the outlet pipe is 0.024 with a minor loss coefficient totaling 28 (entrance loss 0.8, bend loss 1.0, and exit loss 1.0). Assume the tailwater elevation remains below the top of pipe for the range in discharge rates expected. The water surface area in the reservoir is listed below. the reservoir at the start of the storm is 310.0 m (1,016.8 ft). Discharge Time cms Route the following hydrograph through the reservoir. The water surface elevations Discharge Time hrs cfs cms hrs cfs Elevation Reservoir area m ft ha ac 0 05 1.0 1.5 20 25 3.0 3.5 4.0 0 8 30 100 170 165 155 140 120 0 282 1,059 3,530 6,000 5,824 5,472 4,942 4,236 4.5 5.0 5.5 6.0 6.5 7.0 7.5 8.0 8.5 100 80 65 50 35 20 10 5 0 3,530 2,824 2,294 1,765 1,236 706 353 176 0 1,016.8 1,023.7 310 312 315 316 317 318 319 320 1,033.2 1,036.5 1,039.8 1,043.0 1.046.3 1,049.6 20 30 50 60 75 95 120 150 49.4 74.1 123.6 148.3 185.3 234.7 296.5 370.6 Ranta tha fall._ n 5 m (16.4') El. = 300.0 (984.0 ft) 10 m S = 0.005 (32.8') Gm . 65 m (213.2) 299.67m (982.92 ft)