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Drainage Calculation
Example Drainage Calculation using excel...
Author:
Wan Mahiram
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Guide Drainage Routier Setra
Project:
Sg Koyan
Project No
PJ1001
Designer
Location r e b m u N n i a r D
u/s
d/ d /s
Area
) A ( a e r A
f f O n u R f o ) t C n ( c e i c i f f e o C
(ha)
Tim e Of Conc. x C ( a e r ) A t A n e l a v i u q E
(ha)
) o t ( e m i T d n a l r e v O
(m ( m in)
) d t (
e m i T n i a r D
(m in)
. c n o C f O e m i T a e r a b u S
(m in)
Date
Feb-2012
Sheet:
of
Drain Design Param eters
I R A n g i s e D
x l C a ( t o T a e e r v A i ) t a t A l u n e l m u a v C i u q E
) c f t O ( n e o i m t i a T t r l a n e c i c t i r n C o C
(year)
(ha)
(m in)
) I ( y t i s n e t n I l l a f n i a R
3
Drain Details
I e x g ) a A h x c s C i ( D = Q
t r e v l u C r o n i a r D f o e p y T
y t i c a p a C
(m m/hr) (cu.m/s)
(cu.m /s)
(m /s)
l e v e L t r e v n I
l e v e L d n u o r G d e m u s s A
l e v e L t r e v n I
s e c n e r e f f i d
(min)
(m )
(m )
(m )
(m )
(m )
1. 1.320
w o l F e m i T
(m )
Road
Drain
39.166667
Gradient 1:X Gradient 1:X
H
W
140.52146
λ
K
θ
П
2
0.150
0.9
0.135
0. 0 .000
2
10.00
140.5
0.053 0.9 x 0.9 BC
1.174
93
52.60
51.40
52.50
50.94
1.57
930
90 9 00
53.1150
0.1680
0.1910
0 .8 3 3 0
140.5
2
3
0.137
0.9
0.124
1.320
10
0. 0.259
11.32
175.2
0.126 0.9 x 0.9 BC
1.276
1.575
107
1.132
52.50
50.94
51.90
49.87
2.04
178.333333
100
600
900
53.1150
0.1680
0.1910
0 .8 3 3 0
175.2
3
4
0.897
0.9
0. 0.807
1.132
10
1. 1 .066
12 12.45
168.3
0.498 0.9 x 0.9 BC
1.276
1. 1.575
69
0.730
51.90
49.87
51.70
49.18
2.53
345
100
60 6 00
90 9 00
53.1150
0.1680
0.1910
0 .8 3 3 0
168.3
4
5
0.149
0.9
0.134
0.730
10
1. 1.200
13 13.18
164.1
0.547 0.9 x 0.9 BC
1. 17 176
51.70
49.18
48.78
47.30
1.48
44.8630137
70
600
900
53.1150
0.1680
0.1910
0 .8 3 3 0
164.1
6
0.149
0.9
0.134
1.176
10
1. 1.334
14 14.36
157.9
0.585 0.9 x 0.9 BC
1.503 1. 1.857 2.411 2.977
131
5
74
0. 0.414
48.78
47.30
46.30
44.10
2.20 CAS
29.8387097
70
600
900
53.1150
0.1680
0.1910
0 .8 3 3 0
157.9
53.1150
0.1680
0.1910
0 .8 3 3 0
53.1150
0.1680
0.1910
0 .8 3 3 0
229.7
53.1150
0.1680
0.1910
0 .8 3 3 0
1
1f
1e
1f
1g
1g 1e
0.007
0.35
0.110
0.35
1e
0.052
0.35
1c
0.000
0. 0.002 0. 0.039
5
5 5
0.000
10
0.000
0. 0.135
0.002
10
0.039
5.00 5.00
229.7 229.7
0.018
0.994
10
0. 0 .057
5.99
218.7
0.000
0.192
10
0.059
6.19
216.8
5
0.002 0.9 x 0.9 BC
0.951 0.035 0.9 x 0.9 BC 2.256 0.036 0.9 x 0.9 BC 0.951
0.000
10
0.326
5.00
229.7
0.208 0.9 x 0.9 BC
10
0. 0.455
6.37
214.9
0.272 0.9 x 0.9 BC
10
0.891
5.00
229.7
0.569 0.9 x 0.9 BC
10
1. 1.346
7.27
206.3
0.771 0.9 x 0.9 BC
1c
0.363
0.9
0. 0.326
1c
1b
0.077
0.9
0.069
1a
1b
0.485
0.9
0.436
1b
9
0.000
0.9
0.000
7a
7b
0.379
0.9
0. 0.341
0.000
10
0.341
5.00
229.7
7b
7c
0.084
0.9
0.075
2.318
10
0. 0.416
7.32
205.8
0.228
0.9
0.205
0.274
7.59
203.3
0.899
1.924
0.025 0.9 x 0.9 BC
0.185
1d
0.951
y t i c o l e V
l e v e L d n u o r G d e m u s s A
n o i t c e S n I
n i a r D f O h t g n e L
1.447 1.002
2.375
51.24
1.26
2.785
32
0. 0.192
52.50
51.24
52.10
50.84
1.26
1.174
13
0. 0.185
52.21
50.71
52.21
50.68
1.53
0.1910
0 .8 3 3 0
0.1680
0.1910
0 .8 3 3 0
214.9
53.1150
0.1680
0.1910
0 .8 3 3 0
1.174 0.951 1. 1.078 1.331
100
1. 42 420
52.10
50.90
52.00
50.68
1.32
450
600
900
53.1150
0.1680
0.1910
0 .8 3 3 0
229.7
14
0. 0.175
51.70
50.11
51.70
50.07
1.63
#DIV/0!
350
350
900
53.1150
0.1680
0.1910
0 .8 3 3 0
206.3
53.1150
0.1680
0.1910
0 .8 3 3 0
0.218 0.9 x 0.9 BC
200
2. 31 318
52.00
50.80
51.35
50.13
1.22
307.692308
300
600
900
53.1150
0.1680
0.1910
0 .8 3 3 0
229.7
0.238 0.9 x 0.9 BC
49
0. 0.274
51.35
50.13
49.20
48.00
1.20 CAS
22.7906977
70
600
900
53.1150
0.1680
0.1910
0 .8 3 3 0
205.8
141
0. 98 989
49.20
48.00
48.00
46.72
1.28
117.5
110
900
53.1150
0.1680
0.1910
0 .8 3 3 0
203.3
61
0. 0.342
48.00
46.72
46.50
45.30
1.20 CAS
40.6666667
70
600
900
53.1150
0.1680
0.1910
0 .8 3 3 0
194.9
93
0. 0.521
46.50
45.30
44.00
42.80
1.20 CAS
37.2
70
600
900
53.1150
0.1680
0.1910
0 .8 3 3 0
192.2
53.1150
0.1680
0.1910
0 .8 3 3 0
128
0. 71 717
47.42
46.22
44.00
42.80
1.20 CAS
37.4269006
70
600
900
53.1150
0.1680
0.1910
0 .8 3 3 0
229.7
53.1150
0.1680
0.1910
0 .8 3 3 0
5.00
229.7
0.103 0.9 x 0.9 BC
0.000
10
0. 0 .193
5.00
229.7
0.123 0.9 x 0.9 BC
0.175
10
1. 1.762
7.44
204.7
1.002 0.9 x 0.9 BC
0.1680
0.1910
0 .8 3 3 0
53.1150
0.1680
0.1910
0 .8 3 3 0
229.7
53.1150
0.1680
0.1910
0 .8 3 3 0
219.6
197.2
2.034
15
0. 0.123
51.25
49.70
51.25
49.60
1.65
#DIV/0!
150
600
900
53.1150
0.1680
0.1910
0 .8 3 3 0
197.2
53.1150
0.1680
0.1910
0 .8 3 3 0
229.7
0.177 0.9 x 0.9 BC
2.396
83
0. 0.577
51.70
50.50
51.25
50.04
1.21
184.444444
180
600
900
53.1150
0.1680
0.1910
0 .8 3 3 0
229.7
2.977
48
0. 0.269
51.25
49.60
48.78
47.58
1.20 CAS
19.4331984
70
600
900
53.1150
0.1680
0.1910
0 .8 3 3 0
196.2
2.977
60
0. 0.336
48.78
47.58
47.14
45.94
1.20 CAS
36.5853659
70
600
900
53.1150
0.1680
0.1910
0 .8 3 3 0
194.0
53.1150
0.1680
0.1910
0 .8 3 3 0
53.1150
0.1680
0.1910
0 .8 3 3 0
229.7
53.1150
0.1680
0.1910
0 .8 3 3 0
53.1150
0.1680
0.1910
0 .8 3 3 0
216.5
53.1150
0.1680
0.1910
0 .8 3 3 0
53.1150
0.1680
0.1910
0 .8 3 3 0
212.8
53.1150
0.1680
0.1910
0 .8 3 3 0
229.7
0.863
10
2. 2.216
8.31
0.000
10
0.277
5.00
0.123
10
2. 2.540
8.43
196.2
0.269
10
2. 2.622
8.70
194.0
0.9
0.029
5
229.7
1.276
1.795 1.384 0.9 x 0.9 BC 2.411 1.413 0.9 x 0.9 BC 2.411 0.522 0.9 x 0.9 BC
2.876 2.330 2.
209
1. 21 211
52.15
50.95
49.50
48.16
1.34
78.8679245
75
600
900
1.211
10
0.873
6.21
216.5
0.525 300 BD
0.783
2.328
52
0. 0.372
49.50
48.16
48.00
47.01
0.99
34.6666667
45
450
600
0.372
10
0.935
6.58
212.8
0.553 300 BD
0.888
2.639
53
0. 0.335
48.00
47.01
46.42
45.49
0.93
33.5443038
35
600
900
0.000
10
0. 0.029
5.00
0.0
53.1150
900 90 9 00
0.082
0.032
204.7
600
0.047
20
229.7
60 6 00
0.9
16
0 .8 3 3 0
250
0.9
0.016
0 .8 3 3 0
0.1910
100
0.091
0. 04 046
0.1910
0.1680
104
0.052
0. 03 039
0.1680
53.1150
286.666667
25
0.9
53.1150
900
1.25
24
0. 35 35
900
600
1.24
24
0. 35 35
600
230
50.00
11
0.018
170
188.888889
50.26
0. 0.277
0. 13 132
173.333333
1.55
51.25
0.020
0. 11 111
1.21
49.70
51.50
0.9
15
50.49
51.25
50.26
0.9
14
51.70
50.07 50.60
0.308
0.016
50.95
51.70
51.50
0.022
0.9
52.15
0. 0.863
51.80
11
0.018
0. 0.639
85
0.910
11
14
78
1.642
0. 0.174
0.251 0.9 x 0.9 BC 0.277 0.9 x 0.9 BC
10
13
0.0
2.034
86
229.7 219.6
5.00
0.0
26
5.00 5.91
0.818
0.0
1. 1 .575
0.394 0. 0.454
10
1.647 1.330
600
0.0
2.491
10 10
0.000
2.977 2.411 2.
1000
2.018 1.214 0.9 x 0.9 BC 1.647
0.000 0.910
11a
5
0.0
0.1680
53.1150
0.161
0. 0.775
229.7
53.1150
900
10
0. 04 043
216.8
90 9 00
0.161
0.9
218.7
0 .8 3 3 0
600
0.9
0. 35 35
0 .8 3 3 0
0.1910
60 6 00
0.179
0.861
0 .8 3 3 0
0.1910
0.1680
150
7
0. 12 122
0.1910
0.1680
53.1150
150
21
13
0.1680
53.1150
200
194.9
12
53.1150
900
166.666667
192.2
5
900
600
1.59
8.58
5
600
1.33
8.92
0.061
80 450
50.11
0. 0.918
0. 0 .394
229.7
50.88
0. 0.717
0.9
51.70
0. 0.621
0.9
0 .8 3 3 0
52.21
10
0.437
0.1910
50.68
10
0.067
0.1680
51.40
10
10 10
53.1150
52.21
0.989
10 10b
90 9 00
52.60
0.342
10b
60 6 00
0. 0.899
0.095
10a
0.0
450
0. 0.572
0.201
5
0.0
85
0.9
0. 0.193
80 #DIV/0!
900
78
0.9
0.222
700
600
1.575
0.106
0.9
110
2.274
0.224
0.9
133.333333
60 6 00
7
0.247
1.28
52.50
7e
0.214
50.93
51.40
7d
9
52.21
52.60
7c
10
51.40
0. 0.994
7e
8
52.60
70
7d
9
0. 0.365
1.174
1.438 1.165 1. 2.411 2.977 0.351 0.9 x 0.9 BC 1.924 2. 2.375 0.388 0.9 x 0.9 BC 2.411 2.977 0.490 0.9 x 0.9 BC 2.411 2.977
5
52
200
229.7
0.019 300 BD
0.830
2.469
98
0. 0.662
49.20
48.00
46.42
45.55
0.87
35.2517986
40
600
900
53.1150
0.1680
0.1910
0 .8 3 3 0
53.1150
0.1680
0.1910
0 .8 3 3 0
53.1150
0.1680
0.1910
0 .8 3 3 0
0.0
0.0
0.0
0.0
0.0 0.0
0.0
19
20
0.439
0.9
0.395
0.662
10
0. 0.395
5.00
229.7
0.252 0.9 x 0.9 BC
85
0. 0.899
47.42
46.22
46.42
45.22
1.20
85
85
600
900
53.1150
0.1680
0.1910
0 .8 3 3 0
229.7
15
0.000
0.9
0.000
0.899
10
0. 0.424
5.90
219.7
0.259 0.9 x 0.9 BC
1.260 1.647
1.575
20
2.034
10
0. 0.082
46.42
44.87
46.30
44.80
1.50
83.3333333
150
600
900
53.1150
0.1680
0.1910
0 .8 3 3 0
219.7
53.1150
0.1680
0.1910
0 .8 3 3 0
15
26
0.335
10
1. 1.431
6.92
209.5
0.833 0.9 x 0.9 BC
2.411
2.977
50
0. 0.280
46.30
44.80
45.50
44.30
1.20
62.5
100
600
900
53.1150
0.1680
0.1910
0 .8 3 3 0
209.5
53.1150
0.1680
0.1910
0 .8 3 3 0
53.1150
0.1680
0.1910
0 .8 3 3 0
206.9 191.3
26
25
25
6
6
EXIST
0.042
0.9
0.038
0. 09 095
0. 35 35
0. 03 033
0.000
0.9
0.000
0.000
0.9
0.280
0.000
21
22
0.228
0.9
0. 0.205
22
23
0.048
0.9
0.043
Project:
Sg Koyan
5
10
1. 1.431
7.20
206.9
0.336
10
4. 4.053
9.03
191.3
0.054
5
5.386
9.09
169.9
0.000
10
0.205
5.00
229.7
0.778
10
0. 0.248
5.78
221.0
0.822 0.9 x 0.9 BC
1.111 1.371 2.154 1.05 x 1.05 B 2.899 2. 2.629 2.543 450 BD 3.530 2.879 0.131 0.9 x 0.9 BC
2.256 2. 2.785 0.152 0.9 x 0.9 BC 1.647 2.034
39
0. 0.474
45.50
44.30
45.50
44.17
1.33
8.5
0 .0 .054
45.50
44.17
46.30
44.10
2.20
34
0. 0.197
46.30
44.10
42.50
41.30
1.20 CAS
#DIV/0!
300
600
900
0.0
0.0
-10.625
110
600
900
53.1150
0.1680
0.1910
0 .8 3 3 0
8.94736842
70
1500
750
53.1150
0.1680
0.1910
0 .8 3 3 0
53.1150
0.1680
0.1910
0 .8 3 3 0
169.9
130
0. 77 778
47.42
46.22
45.92
44.60
1.33
86.6666667
80
600
900
53.1150
0.1680
0.1910
0 .8 3 3 0
229.7
50
0. 0.410
45.92
44.60
45.50
44.26
1.24
119.047619
150
600
900
53.1150
0.1680
0.1910
0 .8 3 3 0
221.0
0.1680
0.1910
0.8330
180.4
Project No
0.0
PJ1001
Designer
Location r e b m u N n i a r D
Area
) A ( a e r A
f f O n u R f o ) t C n ( c e i c i f f e o C
Time Of Conc. x C ( a e r ) A t A n e l a v i u q E
) o t ( e m i T d n a l r e v O
23 EXIST 16
17
0.966
0.9
0.869
17
18
0.262
0.9
0.236
19
18
0.504
0.9
0.454
18
7
0.000
0.9
0.000
7
Exist
5
) d t ( e m i T n i a r D
. c n o C f O e m i T a e r a b u S
Date
Feb-2012
Sheet:
of
Drain Design Parameters
I R A n g i s e D
x l a C ( t o T a e e v r i t A ) a t A l u n e l m u a v C i u q E
) c f t ( O n e o i m t i T a r l t a n c i e c t i r n C o C
) I ( y t i s n e t n I l l a f n i a R
3
Drain Details
I e x g ) a A h x c s C i ( D = Q
t r e v l u C r o n i a r D f o e p y T
n i a r D f O h t g n e L
n o i t c e
l e v e L d n u o r G d e m u s s A
l e v e L t r e v n I
l e v e L d n u o r G d e m u s s A
l e v e L t r e v n I
y t i c o l e V
0.375
2.397
40
0.278
45.50
44.26
45.40
41.70
3.70 CAS
2.109
49.20
48.00
48.60
47.39
S n I
w o l F e m i T
0.474
5
0.248
7.67
180.4
0.124 300BD
0.000
10
0.869
5.00
229.7
0.554 0.9 x 0.9 BC
182
2.109
10
1.105
7.11
207.7
1.165 1.438 0.638 0.9 x 0.9 BC 2.411 2.977
91
0.509
48.60
47.39
44.00
10
0.504
5.00
229.7
128
0.717
47.42
46.22
44.00
10
1.609
7.62
203.1
15
0.159
44.00
42.50
10
2.688
9.44
188.2
2.411 2.977 0.908 0.9 x 0.9 BC 1.260 1.575 1.959 2.953 1.405 450 BD
42
0.237
44.00
42.44
5 0.509
0.321 0.9 x 0.9 BC
s e c n e r e f f i d
y t i c a p a C
Road
Drain
39.166667
140.52146
400
25
600
900
53.1150 53.1150
0.1680
0.1910
0.8330
1.21
303.333333
300
600
900
53.1150
0.1680
0.1910
0.8330
229.7
42.80
1.20 CAS
19.7826087
70
600
900
53.1150
0.1680
0.1910
0.8330
207.7
53.1150
0.1680
0.1910
0.8330
42.80
1.20 CAS
37.4269006
70
600
900
53.1150
0.1680
0.1910
0.8330
229.7
44.00
42.44
1.56
#DIV/0!
250
600
900
53.1150
0.1680
0.1910
0.8330
203.1
32.91
30.46
2.45 CAS
3.78719567
40
750
750
53.1150
0.1680
0.1910
0.8330
188.2
0.0
0.0
Project:
Sg Koyan
Project No
PJ1001
Designer
Location
Area
r e b m u N n i a r D
) A ( a e r A
f f O n u R f o ) t C n ( c e i c i f f e o C
Time Of Conc. x C ( a e r ) A t A n e l a v i u q E
) o t ( e m i T d n a l r e v O
23 EXIST 16
17
0.966
0.9
0.869
17
18
0.262
0.9
0.236
19
18
0.504
0.9
0.454
18
7
0.000
0.9
0.000
7
Exist
5
) d t ( e m i T n i a r D
. c n o C f O e m i T a e r a b u S
Date
Feb-2012
Sheet:
of
Drain Design Parameters
I R A n g i s e D
x l a C ( t o T a e e v r i t A ) a t A l u n e l m u a v C i u q E
) c f t ( O n e o i m t i T a r l t a n c i e c t i r n C o C
) I ( y t i s n e t n I l l a f n i a R
3
Drain Details t r e v l u C r o n i a r D f o e p y T
I e x g ) a A h x c s C i ( D = Q
n o i t c e
n i a r D f O h t g n e L
l e v e L d n u o r G d e m u s s A
l e v e L t r e v n I
l e v e L d n u o r G d e m u s s A
l e v e L t r e v n I
y t i c o l e V
0.375
2.397
40
0.278
45.50
44.26
45.40
41.70
3.70 CAS
2.109
49.20
48.00
48.60
47.39
S n I
w o l F e m i T
0.474
5
0.248
7.67
180.4
0.124 300BD
0.000
10
0.869
5.00
229.7
0.554 0.9 x 0.9 BC
182
2.109
10
1.105
7.11
207.7
1.165 1.438 0.638 0.9 x 0.9 BC 2.411 2.977
91
0.509
48.60
47.39
44.00
10
0.504
5.00
229.7
128
0.717
47.42
46.22
44.00
10
1.609
7.62
203.1
15
0.159
44.00
42.50
10
2.688
9.44
188.2
2.411 2.977 0.908 0.9 x 0.9 BC 1.260 1.575 1.959 2.953 1.405 450 BD
42
0.237
44.00
42.44
5 0.509
s e c n e r e f f i d
y t i c a p a C
0.321 0.9 x 0.9 BC
Road
Drain
S
0.9
W (m) =
1.05
140.52146
180.4
0.8330
229.7
0.8330
207.7
229.7
0.8330
203.1
0.8330
188.2
25
600
900
53.1150 53.1150
0.1680
0.1910
0.8330
1.21
303.333333
300
600
900
53.1150
0.1680
0.1910
42.80
1.20 CAS
19.7826087
70
600
900
53.1150
0.1680
0.1910
53.1150
0.1680
0.1910
0.8330
42.80
1.20 CAS
37.4269006
70
600
900
53.1150
0.1680
0.1910
0.8330
44.00
42.44
1.56
#DIV/0!
250
600
900
53.1150
0.1680
0.1910
32.91
30.46
2.45 CAS
3.78719567
40
750
750
53.1150
0.1680
0.1910
Type of Drain W (m) =
39.166667
400
W (m) =
1.2
A =
0.810
A=
1.103
A=
1.440
P=
3.600
P=
4.200
P=
4.800
R=
0.225
R=
0.263
R=
0.300
n=
0.015
n=
0.015
n=
0.015
Q
V
Q
V
Q
V
(cum/s)
(m/s)
(cum/s)
(m/s)
(cum/s)
(m/s)
1:
20
4.5115
5.570
6.7983
6.166
9.6974
6.734
1:
30
3.6836
4.548
5.5508
5.035
7.9179
5.499
1:
40
3.1901
3.938
4.8071
4.360
6.8571
4.762
1:
50
2.8533
3.523
4.2996
3.900
6.1332
4.259
1:
60
2.6047
3.216
3.9250
3.560
5.5988
3.888
1:
70
2.4115
2.977
3.6338
3.296
5.1835
3.600
1:
75
2.3297
2.876
3.5106
3.184
5.0077
3.478
1:
90
2.1267
2.626
3.2047
2.907
4.5714
3.175
1: 100
2.0176
2.491
3.0403
2.758
4.3368
3.012
1: 110
1.9237
2.375
2.8988
2.629
4.1350
2.872
1: 120
1.8418
2.274
2.7754
2.517
3.9590
2.749
1: 130
1.7695
2.185
2.6665
2.419
3.8036
2.641
0.1680
0.1910
0.8330
0.0
0.0
Type of Drain W (m) =
S
0.9
W (m) =
1.05
W (m) =
1.2
A =
0.810
A=
1.103
A=
1.440
P=
3.600
P=
4.200
P=
4.800
R=
0.225
R=
0.263
R=
0.300
n=
0.015
n=
0.015
n=
0.015
Q
V
Q
V
Q
V
(cum/s)
(m/s)
(cum/s)
(m/s)
(cum/s)
(m/s)
1:
20
4.5115
5.570
6.7983
6.166
9.6974
6.734
1:
30
3.6836
4.548
5.5508
5.035
7.9179
5.499
1:
40
3.1901
3.938
4.8071
4.360
6.8571
4.762
1:
50
2.8533
3.523
4.2996
3.900
6.1332
4.259
1:
60
2.6047
3.216
3.9250
3.560
5.5988
3.888
1:
70
2.4115
2.977
3.6338
3.296
5.1835
3.600
1:
75
2.3297
2.876
3.5106
3.184
5.0077
3.478
1:
90
2.1267
2.626
3.2047
2.907
4.5714
3.175
1: 100
2.0176
2.491
3.0403
2.758
4.3368
3.012
1: 110
1.9237
2.375
2.8988
2.629
4.1350
2.872
1: 120
1.8418
2.274
2.7754
2.517
3.9590
2.749
1: 130
1.7695
2.185
2.6665
2.419
3.8036
2.641
1: 140
1.7052
2.105
2.5695
2.331
3.6653
2.545
1: 150
1.6474
2.034
2.4824
2.252
3.5410
2.459
1: 160
1.5950
1.969
2.4035
2.180
3.4286
2.381
1: 170
1.5474
1.910
2.3318
2.115
3.3262
2.310
1: 180
1.5038
1.857
2.2661
2.055
3.2325
2.245
1: 190
1.4637
1.807
2.2056
2.001
3.1463
2.185
1: 200
1.4267
1.761
2.1498
1.950
3.0666
2.130
1: 210
1.3923
1.719
2.0980
1.903
2.9927
2.078
1: 220
1.3603
1.679
2.0498
1.859
2.9239
2.030
1: 230
1.3304
1.642
2.0047
1.818
2.8596
1.986
1: 240
1.3024
1.608
1.9625
1.780
2.7994
1.944
1: 250
1.2760
1.575
1.9228
1.744
2.7428
1.905
1: 260
1.2513
1.545
1.8855
1.710
2.6896
1.868
1: 270
1.2279
1.516
1.8503
1.678
2.6393
1.833
1: 280
1.2057
1.489
1.8169
1.648
2.5917
1.800
1: 290
1.1848
1.463
1.7853
1.619
2.5467
1.769
1: 300
1.1649
1.438
1.7553
1.592
2.5039
1.739
1: 310
1.1459
1.415
1.7268
1.566
2.4631
1.711
1: 320
1.1279
1.392
1.6996
1.542
2.4244
1.684
1: 330
1.1107
1.371
1.6736
1.518
2.3873
1.658
1: 340
1.0942
1.351
1.6488
1.496
2.3520
1.633
1: 350
1.0785
1.331
1.6251
1.474
2.3181
1.610
1: 360
1.0634
1.313
1.6024
1.453
2.2857
1.587
1: 370
1.0489
1.295
1.5806
1.434
2.2546
1.566
1: 380
1.0350
1.278
1.5596
1.415
2.2247
1.545
1: 390
1.0216
1.261
1.5395
1.396
2.1960
1.525
1: 400
1.0088
1.245
1.5201
1.379
2.1684
1.506
1: 410
0.9964
1.230
1.5015
1.362
2.1418
1.487
1: 420
0.9845
1.215
1.4835
1.346
2.1162
1.470
1: 430
0.9730
1.201
1.4662
1.330
2.0914
1.452
1: 450
0.9511
1.174
1.4332
1.300
2.0444
1.420
1: 700
0.7626
0.941
1.1491
1.042
1.6392
1.138
Type of Drain
Culvert
DIA (m) =
S
0.6
DIA (m) =
0.75
DIA (m) =
0.9
DIA (m) =
A =
0.283
A=
0.442
A=
0.636
A=
P=
1.885
P=
2.357
P=
2.828
P=
R=
0.150
R=
0.188
R=
0.225
R=
n=
0.015
n=
0.015
n=
0.015
n=
Q
V
Q
V
Q
V
Q
(cum/s)
(m/s)
(cum/s)
(m/s)
(cum/s)
(m/s)
(cum/s)
1:
20
1.2052
4.262
2.1819
4.938
3.5438
5.570
5.3400
1:
30
0.9840
3.480
1.7815
4.032
2.8935
4.548
4.3601
1:
40
0.8522
3.014
1.5429
3.492
2.5058
3.938
3.7760
1:
50
0.7622
2.696
1.3800
3.123
2.2413
3.523
3.3773
1:
60
0.6958
2.461
1.2597
2.851
2.0460
3.216
3.0831
1:
70
0.6442
2.278
1.1663
2.640
1.8942
2.977
2.8544
1:
80
0.6026
2.131
1.0910
2.469
1.7719
2.785
2.6700
1:
90
0.5681
2.009
1.0286
2.328
1.6705
2.626
2.5173
1: 100
0.5390
1.906
0.9758
2.208
1.5848
2.491
2.3881
1: 110
0.5139
1.817
0.9304
2.106
1.5111
2.375
2.2770
1: 120
0.4920
1.740
0.8908
2.016
1.4467
2.274
2.1801
1: 130
0.4727
1.672
0.8558
1.937
1.3900
2.185
2.0945
1: 140
0.4555
1.611
0.8247
1.866
1.3394
2.105
2.0183
1: 150
0.4401
1.556
0.7967
1.803
1.2940
2.034
1.9499
1: 160
0.4261
1.507
0.7714
1.746
1.2529
1.969
1.8880
1: 170
0.4134
1.462
0.7484
1.694
1.2155
1.910
1.8316
1: 180
0.4017
1.421
0.7273
1.646
1.1813
1.857
1.7800
1: 190
0.3910
1.383
0.7079
1.602
1.1498
1.807
1.7325
1: 200
0.3811
1.348
0.6900
1.562
1.1206
1.761
1.6887
1: 210
0.3719
1.315
0.6734
1.524
1.0936
1.719
1.6480
1: 220
0.3634
1.285
0.6579
1.489
1.0685
1.679
1.6101
1: 230
0.3554
1.257
0.6434
1.456
1.0450
1.642
1.5747
1: 240
0.3479
1.230
0.6299
1.426
1.0230
1.608
1.5415
1: 250
0.3409
1.205
0.6171
1.397
1.0023
1.575
1.5104
1: 260
0.3343
1.182
0.6052
1.370
0.9829
1.545
1.4811
1: 270
0.3280
1.160
0.5938
1.344
0.9645
1.516
1.4534
1: 280
0.3221
1.139
0.5831
1.320
0.9471
1.489
1.4272
1: 290
0.3165
1.119
0.5730
1.297
0.9306
1.463
1.4024
1: 300
0.3112
1.100
0.5634
1.275
0.9150
1.438
1.3788
1: 310
0.3061
1.083
0.5542
1.254
0.9001
1.415
1.3564
1: 320
0.3013
1.066
0.5455
1.235
0.8859
1.392
1.3350
1: 330
0.2967
1.049
0.5372
1.216
0.8724
1.371
1.3146
1: 340
0.2923
1.034
0.5292
1.198
0.8595
1.351
1.2951
1: 350
0.2881
1.019
0.5216
1.180
0.8471
1.331
1.2765
1: 360
0.2841
1.005
0.5143
1.164
0.8353
1.313
1.2587
1: 370
0.2802
0.991
0.5073
1.148
0.8239
1.295
1.2415
1: 380
0.2765
0.978
0.5006
1.133
0.8130
1.278
1.2251
1: 390
0.2729
0.965
0.4941
1.118
0.8025
1.261
1.2093
1: 400
0.2695
0.953
0.4879
1.104
0.7924
1.245
1.1941
1: 410
0.2662
0.941
0.4819
1.091
0.7827
1.230
1.1794
1: 420
0.2630
0.930
0.4761
1.078
0.7733
1.215
1.1653
1: 430
0.2599
0.919
0.4706
1.065
0.7643
1.201
1.1517
1: 440
0.2570
0.909
0.4652
1.053
0.7555
1.187
1.1385
1: 450
0.2541
0.899
0.4600
1.041
0.7471
1.174
1.1258
1.05
DIA (m) =
1.2
0.866
A=
1.131
3.299
P=
3.770
0.263
R=
0.300
0.015
n=
0.015
V
Q
V
(m/s)
(cum/s)
(m/s)
6.166
7.6173
6.734
5.035
6.2195
5.499
4.360
5.3863
4.762
3.900
4.8176
4.259
3.560
4.3979
3.888
3.296
4.0716
3.600
3.083
3.8087
3.367
2.907
3.5908
3.175
2.758
3.4066
3.012
2.629
3.2480
2.872
2.517
3.1098
2.749
2.419
2.9878
2.641
2.331
2.8791
2.545
2.252
2.7815
2.459
2.180
2.6931
2.381
2.115
2.6127
2.310
2.055
2.5391
2.245
2.001
2.4714
2.185
1.950
2.4088
2.130
1.903
2.3508
2.078
1.859
2.2967
2.030
1.818
2.2462
1.986
1.780
2.1989
1.944
1.744
2.1545
1.905
1.710
2.1127
1.868
1.678
2.0732
1.833
1.648
2.0358
1.800
1.619
2.0004
1.769
1.592
1.9668
1.739
1.566
1.9348
1.711
1.542
1.9043
1.684
1.518
1.8753
1.658
1.496
1.8475
1.633
1.474
1.8209
1.610
1.453
1.7954
1.587
1.434
1.7710
1.566
1.415
1.7475
1.545
1.396
1.7250
1.525
1.379
1.7033
1.506
1.362
1.6824
1.487
1.346
1.6622
1.470
1.330
1.6428
1.452
1.315
1.6240
1.436
1.300
1.6059
1.420
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