The “cubic meter per year” is a unit of volumetric flow rate that quantifies the amount of volume passing through a system in one year. This unit is often employed in contexts such as hydrology, where it measures the flow rates of rivers to assess water management and distribution. Imagine a single cubic meter cube—roughly the size of a dishwasher—passing by you once every year; it’s a stark reminder of the vast scale at which natural water systems operate.
Interestingly, this unit allows for the calculation of a river’s annual discharge, which can influence decisions related to agriculture, urban water supply, and environmental conservation. An understanding of flow rates on this scale contributes significantly to sustainable water resource management in different regions worldwide.
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.
| Cubic meters per year | Cubic feet per second |
|---|---|
0
m³/a
|
0
ft³/s
|
10000
m³/a
|
0.0111905
ft³/s
|
20000
m³/a
|
0.0223811
ft³/s
|
30000
m³/a
|
0.0335716
ft³/s
|
40000
m³/a
|
0.0447622
ft³/s
|
50000
m³/a
|
0.0559527
ft³/s
|
60000
m³/a
|
0.0671433
ft³/s
|
70000
m³/a
|
0.0783338
ft³/s
|
80000
m³/a
|
0.0895244
ft³/s
|
90000
m³/a
|
0.100715
ft³/s
|
100000
m³/a
|
0.111905
ft³/s
|
110000
m³/a
|
0.123096
ft³/s
|
120000
m³/a
|
0.134287
ft³/s
|
130000
m³/a
|
0.145477
ft³/s
|
140000
m³/a
|
0.156668
ft³/s
|
150000
m³/a
|
0.167858
ft³/s
|
160000
m³/a
|
0.179049
ft³/s
|
170000
m³/a
|
0.190239
ft³/s
|
180000
m³/a
|
0.20143
ft³/s
|
190000
m³/a
|
0.21262
ft³/s
|
200000
m³/a
|
0.223811
ft³/s
|
210000
m³/a
|
0.235002
ft³/s
|
220000
m³/a
|
0.246192
ft³/s
|
230000
m³/a
|
0.257383
ft³/s
|
240000
m³/a
|
0.268573
ft³/s
|
250000
m³/a
|
0.279764
ft³/s
|
260000
m³/a
|
0.290954
ft³/s
|
270000
m³/a
|
0.302145
ft³/s
|
280000
m³/a
|
0.313335
ft³/s
|
290000
m³/a
|
0.324526
ft³/s
|
300000
m³/a
|
0.335716
ft³/s
|
310000
m³/a
|
0.346907
ft³/s
|
320000
m³/a
|
0.358098
ft³/s
|
330000
m³/a
|
0.369288
ft³/s
|
340000
m³/a
|
0.380479
ft³/s
|
350000
m³/a
|
0.391669
ft³/s
|
360000
m³/a
|
0.40286
ft³/s
|
370000
m³/a
|
0.41405
ft³/s
|
380000
m³/a
|
0.425241
ft³/s
|
390000
m³/a
|
0.436431
ft³/s
|
400000
m³/a
|
0.447622
ft³/s
|
410000
m³/a
|
0.458812
ft³/s
|
420000
m³/a
|
0.470003
ft³/s
|
430000
m³/a
|
0.481194
ft³/s
|
440000
m³/a
|
0.492384
ft³/s
|
450000
m³/a
|
0.503575
ft³/s
|
460000
m³/a
|
0.514765
ft³/s
|
470000
m³/a
|
0.525956
ft³/s
|
480000
m³/a
|
0.537146
ft³/s
|
490000
m³/a
|
0.548337
ft³/s
|
500000
m³/a
|
0.559527
ft³/s
|
510000
m³/a
|
0.570718
ft³/s
|
520000
m³/a
|
0.581909
ft³/s
|
530000
m³/a
|
0.593099
ft³/s
|
540000
m³/a
|
0.60429
ft³/s
|
550000
m³/a
|
0.61548
ft³/s
|
560000
m³/a
|
0.626671
ft³/s
|
570000
m³/a
|
0.637861
ft³/s
|
580000
m³/a
|
0.649052
ft³/s
|
590000
m³/a
|
0.660242
ft³/s
|
600000
m³/a
|
0.671433
ft³/s
|
610000
m³/a
|
0.682623
ft³/s
|
620000
m³/a
|
0.693814
ft³/s
|
630000
m³/a
|
0.705005
ft³/s
|
640000
m³/a
|
0.716195
ft³/s
|
650000
m³/a
|
0.727386
ft³/s
|
660000
m³/a
|
0.738576
ft³/s
|
670000
m³/a
|
0.749767
ft³/s
|
680000
m³/a
|
0.760957
ft³/s
|
690000
m³/a
|
0.772148
ft³/s
|
700000
m³/a
|
0.783338
ft³/s
|
710000
m³/a
|
0.794529
ft³/s
|
720000
m³/a
|
0.805719
ft³/s
|
730000
m³/a
|
0.81691
ft³/s
|
740000
m³/a
|
0.828101
ft³/s
|
750000
m³/a
|
0.839291
ft³/s
|
760000
m³/a
|
0.850482
ft³/s
|
770000
m³/a
|
0.861672
ft³/s
|
780000
m³/a
|
0.872863
ft³/s
|
790000
m³/a
|
0.884053
ft³/s
|
800000
m³/a
|
0.895244
ft³/s
|
810000
m³/a
|
0.906434
ft³/s
|
820000
m³/a
|
0.917625
ft³/s
|
830000
m³/a
|
0.928816
ft³/s
|
840000
m³/a
|
0.940006
ft³/s
|
850000
m³/a
|
0.951197
ft³/s
|
860000
m³/a
|
0.962387
ft³/s
|
870000
m³/a
|
0.973578
ft³/s
|
880000
m³/a
|
0.984768
ft³/s
|
890000
m³/a
|
0.995959
ft³/s
|
900000
m³/a
|
1.00715
ft³/s
|
910000
m³/a
|
1.01834
ft³/s
|
920000
m³/a
|
1.02953
ft³/s
|
930000
m³/a
|
1.04072
ft³/s
|
940000
m³/a
|
1.05191
ft³/s
|
950000
m³/a
|
1.0631
ft³/s
|
960000
m³/a
|
1.07429
ft³/s
|
970000
m³/a
|
1.08548
ft³/s
|
980000
m³/a
|
1.09667
ft³/s
|
990000
m³/a
|
1.10786
ft³/s
|
1000000
m³/a
|
1.11905
ft³/s
|
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