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West Central IL | 10" plastic main running 2/3 full at 0.05% grade
Slope (ft/ft) (S) 0.0005
Diameter (feet) (D) 0.8333333333
Radius (feet) 0.4166666667
Area (sq ft) (A) 0.386486083
Circ Segment Height (feet) 0.2775
Central Angle (theta) 2.4605044442
wetted perimeter (P) 1.5927836929
hydraulic radius (R) 0.2426481918
Discharge (cfs) 0.2946733874
Discharge (gpm) 132.2590125915
velocity (V) fps 0.7624424275
7,935 gallons per hour or 190,440 gallons per day
1” of rain per acre = gallons 27,200
Not sure on second half of question | |
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Drainage tile flow math calculation?
