SW4070701_Calcs (Swale)_20200213

ECHOTA PHASE IV
2/12/2020 SW4070701
Response 2
GRASS LINED TRAPEZOIDAL -SHAPED
AND V-SHAPED CHANNELS
GRASS LINED TRAPEZOIDAL -SHAPED AND V-SHAPED
CHANNELS
CHANNEL SLOPE
BUA D.A.
D.A.
C Q25 (1)
Q25 DEPTH TOP WIDTH
DEPTH
BOT WIDTH
HYD. RAID. n
CHANNEL VELOCITY
CAPACITY
Vp (5)
COMMENT
COMMENT
NO. %
ACRES
ACRES
CFS
FT. FT.
FT.
FT.
FT.
NO. FPS
CFS
FPS
VELOCITY
FLOW
1 3.31
0.18
0.44
0.80 3.0
0.66 4.0
1.0
0.0
0.313 0.035
1 3.6
7.1
5.0
OK
OK
2 2.50
0.03
0.51
0.30 4.3
0.79 4.0
1.0
0.0
0.369 0.035
2 3.5
6.9
5.0
OK
OK
3 3.89
0.32
0.38
0.85 2.7
0.93 4.0
1.0
0.0
0.422 0.104
3 1.6
3.2
5.0
OK
OK
4 2.00
0.25
0.48
0.65 6.9
0.99 4.0
1.0
0.0
0.445 0.035
4 3.5
7.0
5.0
OK
OK
5 3.80
0.56
0.66
0.77 4.3
0.74 4.0
1.0
0.0
0.346 0.035
5 4.1
8.2
5.0
OK
OK
6 11.14
0.18
0.22
0.75 1.4
0.59 5.5
1.0
1.5
0.354 0.104
6 2.4
10.2
3.5
OK
OK
7 2.00
0.10
0.17
0.50 0.7
0.42 5.5
1.0
1.5
0.256 0.035
7 2.4
10.3
5.0
OK
OK
8 2.00
0.12
0.10
0.90 0.8
0.43 5.5
1.0
1.5
0.261 0.035
8 2.5
10.4
5.0
OK
OK
9 11.14
0.06
0.14
0.90 1.1
0.54 5.5
1.0
1.5
0.321 0.104
9 2.2
9.5
3.5
OK
OK
10 1.32
0.06
0.16
0.40 0.5
0.41 5.5
1.0
1.5
0.248 0.035
10 1.9
8.2
5.0
OK
OK
11 4.00
0.10
0.19
0.40 0.6
0.36 5.5
1.0
1.5
0.216 0.035
11 3.1
13.0
5.0
OK
OK
12 7.80
0.20
0.27
0.70 1.6
0.44 5.5
1.0
1.5
0.267 0.035
12 4.9
20.9
5.0
OK
OK
13 7.80
0.18
0.27
0.70 1.6
0.44 5.5
1.0
1.5
0.267 0.035
13 4.9
20.9
5.0
OK
OK
14 10.00
0.25
0.06
0.80 0.4
0.25 5.5
1.0
1.5
0.153 0.035
14 3.9
16.4
5.0
OK
OK
15 10.00
0.26
0.08
0.80 0.5
0.28 5.5
1.0
1.5
0.171 0.035
15 4.1
17.6
5.0
OK
OK
16 1.32
0.15
0.18
0.40 0.6
0.43 5.5
1.0
1.5
0.259 0.035
16 2.0
8.5
5.0
OK
OK
17 5.00
0.15
0.29
0.90 2.2
0.54 5.5
1.0
1.5
0.326 0.035
17 4.5
19.2
5.0
OK
OK
18 5.00
0.44
0.23
0.90 1.7
0.50 5.5
1.0
1.5
0.299 0.035
18 4.3
18.1
5.0
OK
OK
19 2.00
0.44
0.18
0.90 1.4
0.54 4.0
1.0
0.0
0.261 0.035
19 2.5
4.9
5.0
OK
OK
(1) 25-YR RATE = 8.45 IN/HR