SW6210906_Design Calculations (Flow)_20220624

[CALCULATIONS
sheet only set up to handle Tc from 5 min to 30 min
A. Flow velocity < 2.0 fps when discharging to wetlands
Storm Event
Rainfall Intensity
5-min
10-min
15-min
30-min
10-yr
7.88
6.31
5.32
3.86
25-yr
8.88
7.07
5.98
4.43
50-yr
9.56
7.61
6.43
4.84
100-yr
10.201
8.131
6.851
5.25
Ditch No. Drainage Impervious Grassed C
Area (ac) I Area (ac) I Area (ac)
1 3.14
0.48
2.66
0.40
2 3.49
0.54
2.95
0.40
4 1.10
0.59
0.51
0.65
5 1.84
0.85
0.99
0.60
Kerby
L (ft) n s Tov
B. Channel slope < 5.0% for curb outlet swales
n/a
n/a
n/a
n/a
Tc
Stonn
Rainfall
Intensity
Q (cfs)
Kirpich
Total Tc
Tc Used
Event (yr)(in/hr)
L (ft) S Tab
n/a 0.00
5
10-yr
7.88
9.90
n/a 0.00
5
10-yr
7.88
11.00
n/a 0.00
5
10-yr
7.88
5.63
n/a 0.00
5
10-yr
7.88
8.70
printed: 6/24/2022 1010 AM
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