Ground Water

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  • How to Read your Irrigation Flow Meter

  • Example 1:

    Converting Gallons toAcre-Inches Applied

     
    If you have a meter with a gallon totalizer remember to note the multiplier beneath the totalizer. For example a standard 8" meter dial face displays 890572 and the meter face reads Gallons x 100, so we add two zeros to the 6-digit dial face reading. 890572 x 100 = 89057,200 gallons
     
    Present Meter Reading: 89,057,200 gallons
    Subtract Previous Reading: 79,488,700 gallons
    Total Gallons Used: 9,568,500 gallons
     
    To convert gallons to acre-inches: Divide gallons used (9,568,500) by 27,154
     
    9,568,500 divided by 27,154 equals 352.38 acre-inches
    (9,568,500 / 27,154 = 352.38 acre-inches)
    To figure acre-inches used, divide acre-inches by acres in field (example: 125 acres) 352.38 acres divided by 125 acres = 2.82 acre inches applied. (325.38 / 125 = 2.82 acre-inches)
     

    Example 2:

    Converting Acre-Feet to Acre-Inches Applied

     
    If you have a meter with an acre-feet totalizer remember to note the multiplier beneath the totalizer. For example a standard 8" meter dial face displays 974602 and the meter face reads Acre Feet x 0.001, so we place the decimal point three places to the left. 974602 x 0.001 = 974.602 acre-feet
     
    Present Meter Reading: 974.602 acre-feet
    Subtract Previous Reading: 968.176 acre-feet
    Total Acre-Feet Used: 6.426 acre-feet
     
    To convert acre-feet to acre-inches: Multiply acre-feet used (6.426) by 12
     
    6.426 multiplied by 12 equals 77.112 acre-inches.
    (6,426 x 12 = 77.112 acre-inches)
    To figure acre-inches used, divide acre-inches by acres in field (example: 64 acres) 77.112 acre inches divided by 64 acres = 1.20 acre-inches applied. (77.112 / 64 = 1.20 acre-inches)
     

    Example 3:

    Converting Acre-Inches to Acre-Inches Applied

     
    If you have a meter with an acre-inches totalizer remember to note the multiplier beneath the totalizer. For example a standard 8" meter dial face displays 974602 and the meter face reads Acre Inches x 0.01, so we place the decimal point two places to the left. 974602 x 0.01 = 9746.02 acre-inches
     
    Present Meter Reading: 9746.02 acre-inches
    Subtract Previous Reading: 9681.76 acre-inches
    Total Acre-Inches Used: 64.26 acre-inches
     
    To convert acre-inches to acre-inches applied: Divide acre-inches by acres in the field (example 30 acres) 64.26 / 30 = 2.142 acre-inches applied.
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