District Water Management

 

General  Water Measurement Information:

1 cubic foot per second (cfs)  =  2 acre feet in 24 hours.
1 cubic foot per second (cfs)  =  1 acre inch per hour.
1 cubic foot per second (cfs)  =  450 gallons per minute.
1 cubic foot per second (cfs)  =  7.5 gallons per second.
1 cubic foot per second (cfs)  =  50 California miner inches.
1 California miner inch  =  9 gallons per minute.
1 acre foot  =  the amount of water required to cover one acre, one foot deep.
1 acre foot  =  325,850 gallons.


Staff Gage - Click to go to Cipolletti weir table.To figure inches of water applied during an irrigation: Multiply cfs at your farm turnout by time in hours and divide by acres being irrigated.

Example: 2 cfs applied to 6 acres in 12 hours.

    2 cfs   x   12 hours   =  4 inches applied
           6 acres

KRD's annual allotment in a 100% water year is 2 cfs per acre of assessed land owned.
If you own 20 acres your allotment will be 40 cfs for the irrigation season (2x20).


Gauge Height Readings
(Cubic Foot per Second given to closest tenth)

Miner’s
Inches
Cubic Feet per
Second
Acre Feet
in 24 Hours

Gage Height (ft.)

2 Foot Weir 3 Foot Weir 4 Foot Weir
25 0.5 1 0.18 0.14 0.11
50 1.0 2 0.28 0.22 0.18
75 1.5 3 0.37 0.28 0.23
100 2.0 4 0.45 0.34 0.28
125 2.5 5 0.52 0.40 0.33
150 3.0 6 0.59 0.45 0.37
175 3.5 7 0.65 0.49 0.41
200 4.0 8 0.71 0.54 0.45

More Info:

 

    KRD's Telemetry, Gage Station, and Data Acquisition System

 

    Bureau of Reclamation's Water Measurement Manual

 

  

    Cipolletti weir tables:

          0 - 0.6 foot head, 0.5 - 5.0 foot weir length.

          0.61 - 1.67 foot head, 2.0 - 5.0 foot weir length.

 

    Gallons per minute to CFS conversion charts:
         Page 1 (1 to 200 GPM)
         Page 2 (201 to 450 GPM)

 

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