A cubic foot per second (cfs) is a unit of flow rate that describes the volume of water or other fluids moving past a point every second. It is commonly used in hydrology to measure rivers and streams, providing insight into water availability and flood prediction. To put it in perspective, one cubic foot per second is equivalent to 7.48 gallons per second. Thus, a modest stream might flow at several tens of cfs, while larger rivers, such as the Mississippi, can exceed 500,000 cfs!
Interestingly, this unit has historical significance dating back to the early days of water management, where it played a crucial role in the development of infrastructure for agriculture and urban planning, influencing patterns of settlement and economic development around the world.
The kilolitre per second (kL/s) is a unit of flow rate used primarily in water management, representing the volume of one kilolitre, or 1,000 liters, flowing past a point every second. While the unit might not be as commonly recognized as liters per minute, it is vital in contexts requiring large-scale fluid flow measurements, such as calculating river discharges or managing wastewater treatment facilities. To put it in perspective, one kilolitre per second is equivalent to the flow rate of about 264 gallons per second, easily filling a standard swimming pool in just a few minutes.
Interestingly, understanding these flow rates becomes crucial during urban planning to ensure sustainable water management systems. It helps engineers design appropriate pipeline capacities and emergency spillways to prevent urban flooding. This illustrates the intersection of environmental sustainability and infrastructure planning, highlighting the kilolitre per second as a cornerstone unit in significant ecological and engineering applications.
Cubic feet per second | Kilolitres per second |
---|---|
0
ft³/s
|
0
kl/s
|
1
ft³/s
|
0.0283168
kl/s
|
2
ft³/s
|
0.0566337
kl/s
|
3
ft³/s
|
0.0849505
kl/s
|
4
ft³/s
|
0.113267
kl/s
|
5
ft³/s
|
0.141584
kl/s
|
6
ft³/s
|
0.169901
kl/s
|
7
ft³/s
|
0.198218
kl/s
|
8
ft³/s
|
0.226535
kl/s
|
9
ft³/s
|
0.254851
kl/s
|
10
ft³/s
|
0.283168
kl/s
|
11
ft³/s
|
0.311485
kl/s
|
12
ft³/s
|
0.339802
kl/s
|
13
ft³/s
|
0.368119
kl/s
|
14
ft³/s
|
0.396436
kl/s
|
15
ft³/s
|
0.424752
kl/s
|
16
ft³/s
|
0.453069
kl/s
|
17
ft³/s
|
0.481386
kl/s
|
18
ft³/s
|
0.509703
kl/s
|
19
ft³/s
|
0.53802
kl/s
|
20
ft³/s
|
0.566337
kl/s
|
21
ft³/s
|
0.594653
kl/s
|
22
ft³/s
|
0.62297
kl/s
|
23
ft³/s
|
0.651287
kl/s
|
24
ft³/s
|
0.679604
kl/s
|
25
ft³/s
|
0.707921
kl/s
|
26
ft³/s
|
0.736238
kl/s
|
27
ft³/s
|
0.764554
kl/s
|
28
ft³/s
|
0.792871
kl/s
|
29
ft³/s
|
0.821188
kl/s
|
30
ft³/s
|
0.849505
kl/s
|
31
ft³/s
|
0.877822
kl/s
|
32
ft³/s
|
0.906139
kl/s
|
33
ft³/s
|
0.934455
kl/s
|
34
ft³/s
|
0.962772
kl/s
|
35
ft³/s
|
0.991089
kl/s
|
36
ft³/s
|
1.01941
kl/s
|
37
ft³/s
|
1.04772
kl/s
|
38
ft³/s
|
1.07604
kl/s
|
39
ft³/s
|
1.10436
kl/s
|
40
ft³/s
|
1.13267
kl/s
|
41
ft³/s
|
1.16099
kl/s
|
42
ft³/s
|
1.18931
kl/s
|
43
ft³/s
|
1.21762
kl/s
|
44
ft³/s
|
1.24594
kl/s
|
45
ft³/s
|
1.27426
kl/s
|
46
ft³/s
|
1.30257
kl/s
|
47
ft³/s
|
1.33089
kl/s
|
48
ft³/s
|
1.35921
kl/s
|
49
ft³/s
|
1.38752
kl/s
|
50
ft³/s
|
1.41584
kl/s
|
51
ft³/s
|
1.44416
kl/s
|
52
ft³/s
|
1.47248
kl/s
|
53
ft³/s
|
1.50079
kl/s
|
54
ft³/s
|
1.52911
kl/s
|
55
ft³/s
|
1.55743
kl/s
|
56
ft³/s
|
1.58574
kl/s
|
57
ft³/s
|
1.61406
kl/s
|
58
ft³/s
|
1.64238
kl/s
|
59
ft³/s
|
1.67069
kl/s
|
60
ft³/s
|
1.69901
kl/s
|
61
ft³/s
|
1.72733
kl/s
|
62
ft³/s
|
1.75564
kl/s
|
63
ft³/s
|
1.78396
kl/s
|
64
ft³/s
|
1.81228
kl/s
|
65
ft³/s
|
1.84059
kl/s
|
66
ft³/s
|
1.86891
kl/s
|
67
ft³/s
|
1.89723
kl/s
|
68
ft³/s
|
1.92554
kl/s
|
69
ft³/s
|
1.95386
kl/s
|
70
ft³/s
|
1.98218
kl/s
|
71
ft³/s
|
2.0105
kl/s
|
72
ft³/s
|
2.03881
kl/s
|
73
ft³/s
|
2.06713
kl/s
|
74
ft³/s
|
2.09545
kl/s
|
75
ft³/s
|
2.12376
kl/s
|
76
ft³/s
|
2.15208
kl/s
|
77
ft³/s
|
2.1804
kl/s
|
78
ft³/s
|
2.20871
kl/s
|
79
ft³/s
|
2.23703
kl/s
|
80
ft³/s
|
2.26535
kl/s
|
81
ft³/s
|
2.29366
kl/s
|
82
ft³/s
|
2.32198
kl/s
|
83
ft³/s
|
2.3503
kl/s
|
84
ft³/s
|
2.37861
kl/s
|
85
ft³/s
|
2.40693
kl/s
|
86
ft³/s
|
2.43525
kl/s
|
87
ft³/s
|
2.46356
kl/s
|
88
ft³/s
|
2.49188
kl/s
|
89
ft³/s
|
2.5202
kl/s
|
90
ft³/s
|
2.54851
kl/s
|
91
ft³/s
|
2.57683
kl/s
|
92
ft³/s
|
2.60515
kl/s
|
93
ft³/s
|
2.63347
kl/s
|
94
ft³/s
|
2.66178
kl/s
|
95
ft³/s
|
2.6901
kl/s
|
96
ft³/s
|
2.71842
kl/s
|
97
ft³/s
|
2.74673
kl/s
|
98
ft³/s
|
2.77505
kl/s
|
99
ft³/s
|
2.80337
kl/s
|
100
ft³/s
|
2.83168
kl/s
|
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