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Lake Discharge Specifications <br />Peak Flow Calculations <br />1. Data: <br />Drainage area: A = 21.9000 Acres <br />Runoff Curve Number: CN = 100 <br />Time of Concentration: Tc = 3.75 hours <br />Storm Type: II <br />Pond and swamp areas spread <br />throughout watershed = 100.00 percent of A <br />2. Frequency: 100 yr <br />3. Rainfall, P (24-hour): 2.30 inches <br />4. Initial abstraction: Ia = 0.0000 <br />5. Compute: Ia/P = 0.0000 <br />6. Unit peak discharge: qu csm/in = 139.75 <br />7. Runoff: Q = 2.3000 inches <br />8. Pond & swap adjustment factor: Fp = 1.00 <br />9. Peak Discharge: qp = 10.9989 cfs <br />Channel Type: Triangular, Equal Side Slopes <br />Side Slope 3.00:1 <br />Discharge: 22.14 cfs <br />Depth of Flow: 1.82 feet <br />Velocity: 2.23 fps <br />Freeboard: 1.00 feet <br />Manning's n: 0.100 (Unmaintained, Dense Weeds) <br />Tri County Technical Revision Sept 07 6