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~J <br />• <br />• <br />DITCH HYDROLOGY CALCULATIONS <br />PERMANENT DIVERSION N0. 4 UPPER (PD-4) <br />AND LOWER (PD-4), N0. 5 (PD-5) AND CULVERT (PC-3) <br />Hydrology Input Values SWS PD-4 <br />(U r) SWS PD-5 SWS PD-4/PC-3 <br />(Lower) <br />Precipitation Distribution SCS-Type II SCS-Type II SCS-Type II <br />Storm Duration (hours) 24 24 24 <br />Precipitation Amount <br />100-year. 24-hour event <br />(in) <br />2.4 <br />2.4 <br />2.4 <br />Hydrogra h Res onse Sha a Medium Medium Medium <br />Drainage Basin Area (acres) 19.9 13.6 0.9 <br />Time of Concentration 0.181 0.196 0.101 <br />Curve Number 69 69 69 <br />Routing Coefficients <br />K (hours) <br />X <br />0.009 <br />0.291 <br />0 <br />0 <br />0 <br />0 <br /> <br />Hydrology Results <br />Peak Discharge (cfs) <br />100-year. 24-hour event <br />5.02 <br />3.31 <br />8.42 <br />APPROVED APR 2 5 1995 <br />H:\857\V OL. S\D&S.PLN <br />01/25/9512:51Pm WP51/emc 23-1154 Revised - 01/30/95 <br />