Measured total hourly discharge rates from a 2.48 mi? drainage basin are tabulated below. The hydrograph...

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Measured total hourly discharge rates from a 2.48 mi? drainage basin are tabulated below. The hydrograph was produced by a rainstorm having a uniform intensity of 2.60 in/hr starting a 9 a.m. and abruptly ending at 11 a.m. The baseflow from 8 a.m. to 3 p.m. was a constant 100 cfs. 9. 11 450 1 p.m. 3 t (hr) Q (cfs) 8 a.m. 12 10 100 100 300 300 150 100 100 (a) Derive a 2-hour unit hydrograph from the data. (b) Derive a 4-hour unit hydrograph from the 2-hour unit hydrograph using the S-Curve. Measured total hourly discharge rates from a 2.48 mi? drainage basin are tabulated below. The hydrograph was produced by a rainstorm having a uniform intensity of 2.60 in/hr starting a 9 a.m. and abruptly ending at 11 a.m. The baseflow from 8 a.m. to 3 p.m. was a constant 100 cfs. 9. 11 450 1 p.m. 3 t (hr) Q (cfs) 8 a.m. 12 10 100 100 300 300 150 100 100 (a) Derive a 2-hour unit hydrograph from the data. (b) Derive a 4-hour unit hydrograph from the 2-hour unit hydrograph using the S-Curve.

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