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,~, <br />ti,F <br />HiIIsSECU Type ll 24-hr Rainfall=3.00" <br />Prepared by Titan Atlantic Page 2 <br />HvdroCAD~ 6.00 s/n 002026 ©1986-2001 Applied Microcomputer Systems 3/17/2003 <br />Subcatchment 1S: New Land Pre-Developed <br />Runoff = 1.53 cfs @ 12.15 hrs, Volume= 0.123 of <br />Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs <br />Type II 24-hr Rainfall=3.00" <br />Area (sf) CN Description <br /> 8,725 98 impervious <br /> a1,aQZ ~4 ^~o~s _ -- <br /> 60,267 77 Weighted Average <br />Tc Length Slope Velocity Capacity Description <br />(min) (feet) (ft/ft) (ft/sec) (cfs) <br />19.5 200 0.0315 0.2 Sheet Flow, <br /> Grass: Dense n= 0.240 P2= 3.60" <br />0.8 150 0.0413 3.3 Shallow Concentrated Flow, <br /> Unpaved Kv= 16.1 fps <br />0.2 50 0.0550 4.8 Shallow Concentrated Flow, <br /> Paved Kv= 20.3 fps <br />0.8 90 0.0678 1.8 Shallow Concentrated Flow, <br /> Short Grass Pasture Kv= 7.0 fps <br />21.3 490. Total <br />Subcatchment 1 S: New Land Pre-Developed <br />Hydrograph Plot <br />h <br />v <br />3 <br />0 <br /> <br /> <br /> <br /> <br /> . . <br />1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 2~ <br />- Runoff <br />Time (hours) <br />