The stage storage relationship at a pond site is described by S = 600 h1.2, where S = storage in the pond in m3 and h = water level in meters above the spillway crest. The discharge over the spillway is described by O = kwL(2g)0.5h1.5, where the discharge (()) is in m3/sec, kw = 0.45 (discharge coefficient), L = 0.3 m (spillway crest length), and g = 9.81 m/sec2 (gravitational acceleration). Initially, h = 0 and S = 0. Build a (2S/ˆ†t + O) versus O relationship for pond stages in 0.2-m increments up to 1.0 m over the spillway crest. Perform storage routing computations for the inflow hydrograph information in the following table to determine the peak outflow and stage.

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Inflow U) Inflow ) Time (min) (msec) Time min msec) 16 24 32 0.38 0.79 0.71 40 48 56 64 72 0.58 0.46 0.35 0.21 0.1