Laserfiche WebLink
DITCH C27 <br />Time of Concentration (SCSMethod) <br />Curve Number: 79 <br />Length of Flow: 1963.63 ft <br />Average Land Slope: 6.5 % <br />Time of Concentration: 0.368 hrs, 22.1 mins <br />DITCH C27 <br />Graphical Peak Discharge <br />Project: Diversion Ditch Drainage By: B. Langenfeld Date: 05/15/09 <br />Location: <br />Checked: Date: <br />Present <br />1. Data: <br />Drainage area: .................... <br />A = 12.6000 Acres <br />Runoff Curve Number: ............. <br />CN = 79 <br />Time of Concentration: ........... <br />Tc = 0.37 <br />Storm Type: ....................... <br />=11 <br />Pond and swamp areas spread <br />throughout watershed ............... <br />= 0.00 percent of A <br />0.0000 Acres <br />2. Frequency ........................yr <br />= 100 <br />3. Rainfall ,P(24 - hour) .............. <br />in = 3.00 <br />4. Initial abstraction, la............ <br />= 0.5316 <br />5. Compute la /P ....................... <br />= 0.1772 <br />6. Unit peak discharge, qu ...... <br />csm/in = 583.89 <br />7. Runoff, Q .........................in <br />= 1.1885 <br />8. Pond & swap adjustment <br />factor .... Fp = 1.00 <br />9. Peak Discharge,gp ...............cfs <br />= 13.6618 <br />Revised August 2009(PB06) Attachment 2.05.3(3) -1 -46 <br />