The “Litre per year” unit, though not commonly spotlighted, offers fascinating insights when it comes to monitoring fluid consumption or production over time. Imagine a single litre of water—that’s about the volume of a milk carton—gradually consumed across the span of a year. This seemingly minimal consumption can offer insightful metrics on low-rate fluid demands, such as water savings within efficient homes or the slow, steady trickle of groundwater recharges.
This unit plays a crucial role in environmental science and resource management. In ecosystems, tracking water flow in “litres per year” can help scientists understand better the natural water cycles and the sustainability of aquifers. By appreciating the subtlety of this unit, one can grasp the intricate balance of our planet’s fluid dynamics, often invisible to the untrained eye.
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.
| Litres per year | Cubic feet per second |
|---|---|
0
l/a
|
0
ft³/s
|
10000
l/a
|
1.11905e-5
ft³/s
|
20000
l/a
|
2.23811e-5
ft³/s
|
30000
l/a
|
3.35716e-5
ft³/s
|
40000
l/a
|
4.47622e-5
ft³/s
|
50000
l/a
|
5.59527e-5
ft³/s
|
60000
l/a
|
6.71433e-5
ft³/s
|
70000
l/a
|
7.83338e-5
ft³/s
|
80000
l/a
|
8.95244e-5
ft³/s
|
90000
l/a
|
0.000100715
ft³/s
|
100000
l/a
|
0.000111905
ft³/s
|
110000
l/a
|
0.000123096
ft³/s
|
120000
l/a
|
0.000134287
ft³/s
|
130000
l/a
|
0.000145477
ft³/s
|
140000
l/a
|
0.000156668
ft³/s
|
150000
l/a
|
0.000167858
ft³/s
|
160000
l/a
|
0.000179049
ft³/s
|
170000
l/a
|
0.000190239
ft³/s
|
180000
l/a
|
0.00020143
ft³/s
|
190000
l/a
|
0.00021262
ft³/s
|
200000
l/a
|
0.000223811
ft³/s
|
210000
l/a
|
0.000235002
ft³/s
|
220000
l/a
|
0.000246192
ft³/s
|
230000
l/a
|
0.000257383
ft³/s
|
240000
l/a
|
0.000268573
ft³/s
|
250000
l/a
|
0.000279764
ft³/s
|
260000
l/a
|
0.000290954
ft³/s
|
270000
l/a
|
0.000302145
ft³/s
|
280000
l/a
|
0.000313335
ft³/s
|
290000
l/a
|
0.000324526
ft³/s
|
300000
l/a
|
0.000335716
ft³/s
|
310000
l/a
|
0.000346907
ft³/s
|
320000
l/a
|
0.000358098
ft³/s
|
330000
l/a
|
0.000369288
ft³/s
|
340000
l/a
|
0.000380479
ft³/s
|
350000
l/a
|
0.000391669
ft³/s
|
360000
l/a
|
0.00040286
ft³/s
|
370000
l/a
|
0.00041405
ft³/s
|
380000
l/a
|
0.000425241
ft³/s
|
390000
l/a
|
0.000436431
ft³/s
|
400000
l/a
|
0.000447622
ft³/s
|
410000
l/a
|
0.000458812
ft³/s
|
420000
l/a
|
0.000470003
ft³/s
|
430000
l/a
|
0.000481194
ft³/s
|
440000
l/a
|
0.000492384
ft³/s
|
450000
l/a
|
0.000503575
ft³/s
|
460000
l/a
|
0.000514765
ft³/s
|
470000
l/a
|
0.000525956
ft³/s
|
480000
l/a
|
0.000537146
ft³/s
|
490000
l/a
|
0.000548337
ft³/s
|
500000
l/a
|
0.000559527
ft³/s
|
510000
l/a
|
0.000570718
ft³/s
|
520000
l/a
|
0.000581909
ft³/s
|
530000
l/a
|
0.000593099
ft³/s
|
540000
l/a
|
0.00060429
ft³/s
|
550000
l/a
|
0.00061548
ft³/s
|
560000
l/a
|
0.000626671
ft³/s
|
570000
l/a
|
0.000637861
ft³/s
|
580000
l/a
|
0.000649052
ft³/s
|
590000
l/a
|
0.000660242
ft³/s
|
600000
l/a
|
0.000671433
ft³/s
|
610000
l/a
|
0.000682623
ft³/s
|
620000
l/a
|
0.000693814
ft³/s
|
630000
l/a
|
0.000705005
ft³/s
|
640000
l/a
|
0.000716195
ft³/s
|
650000
l/a
|
0.000727386
ft³/s
|
660000
l/a
|
0.000738576
ft³/s
|
670000
l/a
|
0.000749767
ft³/s
|
680000
l/a
|
0.000760957
ft³/s
|
690000
l/a
|
0.000772148
ft³/s
|
700000
l/a
|
0.000783338
ft³/s
|
710000
l/a
|
0.000794529
ft³/s
|
720000
l/a
|
0.000805719
ft³/s
|
730000
l/a
|
0.00081691
ft³/s
|
740000
l/a
|
0.000828101
ft³/s
|
750000
l/a
|
0.000839291
ft³/s
|
760000
l/a
|
0.000850482
ft³/s
|
770000
l/a
|
0.000861672
ft³/s
|
780000
l/a
|
0.000872863
ft³/s
|
790000
l/a
|
0.000884053
ft³/s
|
800000
l/a
|
0.000895244
ft³/s
|
810000
l/a
|
0.000906434
ft³/s
|
820000
l/a
|
0.000917625
ft³/s
|
830000
l/a
|
0.000928816
ft³/s
|
840000
l/a
|
0.000940006
ft³/s
|
850000
l/a
|
0.000951197
ft³/s
|
860000
l/a
|
0.000962387
ft³/s
|
870000
l/a
|
0.000973578
ft³/s
|
880000
l/a
|
0.000984768
ft³/s
|
890000
l/a
|
0.000995959
ft³/s
|
900000
l/a
|
0.00100715
ft³/s
|
910000
l/a
|
0.00101834
ft³/s
|
920000
l/a
|
0.00102953
ft³/s
|
930000
l/a
|
0.00104072
ft³/s
|
940000
l/a
|
0.00105191
ft³/s
|
950000
l/a
|
0.0010631
ft³/s
|
960000
l/a
|
0.00107429
ft³/s
|
970000
l/a
|
0.00108548
ft³/s
|
980000
l/a
|
0.00109667
ft³/s
|
990000
l/a
|
0.00110786
ft³/s
|
1000000
l/a
|
0.00111905
ft³/s
|
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