CASTLEREIGH RESERVOIR WATER DISCHARGE RATE

Where

Q the total discharge in ft3/s;

C the coefficient of discharge which depends on the shape of the crest and the head on the crest; l the net or effective length of the crest;

h the actual or measured head on the crest.l = 420ft

h(ft)CQ (ft3/s)

0.13.00 40

0.23.00 113

0.33.00 207

0.43.00 319

0.53.00 445

0.63.02 589

0.73.03 745

0.83.05 917

0.93.10 1112

1.03.15 1323

1.13.16 1531

1.23.18 1756

1.33.20 1992

1.43.22 2240

1.53.25 2508

1.63.28 2788

1.73.31 3081

1.83.35 3398

1.93.37 3707

2.03.40 4039

3.03.58 7813

4.03.78 12701

5.03.85 18079

6.03.98 24567

7.04.06 31581

8.04.15 39440

9.04.25 48195

10.04.32 57376

Reference: Hydro Electric Handbook by William P Creager P122