WESTLANDS WATER DISTRICT

FURROW IRRIGATION SYSTEM EVALUATION

Simplified Procedures, Input Data    Note: Moving the cursor away from the data just entered will recalculate the sheet. Color background groups are required data for calculations.  Tabbing will move the cursor from box to box.

Field ID:
Furrow Spacing, Inches:
Furrow Length, Feet:
Number of Furrows in Set:
Calculated Acres per Set:

Field Onflow Check
First Totalizer, AF:
First CFS:
First Time, HHMM, 24 Hour :
Second Totalizer, AF:
Second CFS:
Second Time, HHMM, 24 Hour:
Calculated Average CFS:
Calculated Average Furrow gpm:

Irrigation Set Advance Data
Start Set Totalizer:
Start Time, HHMM, 24 Hr:
Mid-Field Time, HHMM, 24 Hr:
End Furrow Time, HHMM, 24 Hr:
End Set, HHMM, 24 Hr:
Note: To enter next day times add 2400 
Set Duration, Hours:
Calculated Advance Ratio:
End Set Totalizer:
Calculated AF:

Last Updated September 2003

Furrow Flows
Non-Wheel, gpm:
Wheel, gpm:
Percentage Wheel Rows, 0-100%:
Note: Values automatically adjusted to agree with the calculated average flow in onflow check section, which is dependent on the number of furrows in the first section.Soil Moisture Depletion
0-1 Feet, %  in/ft  in
1-2 Feet, %  in/ft  in.
2-3 Feet, %  in/ft  in.
3-4 Feet, %  in/ft  in.
4-5 Feet, %  in/ft  in.
                          Total Depletion:  in.

Simplified Procedures, Results

Applied Water
 Gross Applied Water:  in.
Tailwater:  in.
Applied Water:  in.

Single Furrow DU: %
Wheel Row DU: %
Field DU: %

Low Quarter Infiltration:  in.
Deep Percolation:  in.
Under Irrigation:  in.
Soil Moisture Replacement:  in.

Irrigation Efficiency:  %

Other factors could affect the field DU, such as, set time differences and soil type differences, but these are not considered here.