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These two software programs have been developed to aid in the design and analysis of center pivot and traveling lateral sprinkler irrigation systems.


To install the program, run SETUP.exe from the Pivnoz directory. This Windows program calculates nozzle sizes and estimates application rates for center pivot sprinkler systems and linearly traveling laterals, for commonly used sprinkler packages. It can be used to nozzle a complete pivot lateral or a section of a pivot lateral. The user must know the desired system capacity, the desired sprinkler spacing(s) along the lateral, and the nozzle pressure(s). Each of the input values can be entered in selected English or metric units as desired.

Initial inputs:
Select either pivot or linear. A linear will be nozzled uniformly.
Enter the system capacity. This is the gross flow per unit area irrigated or the gross depth applied per day on an average daily basis. Any application efficiency estimate must be built in to this value. Select desired units (i.e., mm/day or gpm/acre).
Enter the nozzle pressure. If you desire to use different pressures on different sections, run each section separately.

Pivot inputs:
Enter the beginning and end distances from the pivot of the section for which the nozzling is to be calculated.
Select fixed or variable nozzle spacing.
For fixed spacing, enter the desired nozzle spacing. For variable spacing enter the desired nozzle flow rate.

Linear inputs:
Enter the desired nozzle spacing.
Enter the length of the lateral.
Enter the total travel distance of the lateral.
Enter the percent downtime required for moving the supply hose, etc.

Sprinkler package:

The user may skip this section if only nozzle sizes are desired. Select a specific package by clicking on the drop down box on the right. A list of several available rotating or oscillating-plate packages will be presented. Consult Nelson or Senninger literature for more information on the specific models and plate types. Enter the total nozzle offset produced by the addition of fore and aft spray booms. Enter the mounting height above ground or above the average crop height. If a different type of sprinkler is desired, select the generic box and enter the approximate pattern width for that sprinkler.

Select English or Metric output.
Click RUN to view the output on the right side of the screen.
If any of the inputs are changed, you must click RUN again to recalculate the output.
Nozzle sizes are given in English or metric units and equivalent numbered sizes (1/128 and 1/64 inch increments) used with most commercially available nozzle packages. The pattern width is the diameter of the spray pattern plus the nozzle offset entered above. The peak application rate is the approximate peak of the application rate pattern and not an instantaneous rate which can be much higher.
The output can be saved to a file or printed if desired.

To install the program, run SETUP.exe from the Pipeloss directory.
This Windows program calculates friction losses in individual pipe sections or laterals with multiple, uniformly spaced outlets, either uniform discharge laterals, or center pivot laterals. The program can also handle a lateral comprised of two pipe sections with different diameters and lengths. The program also supplies data on exact inside diameters and friction coefficients for most types of pipe used in irrigation. This software works with either English or Metric units. Pipeloss is installed as a popup Windows program. Additional help in running the program is available by pressing the "readme" button on the screen.

Download each zipped program and explode in its own directory. You may also download the document file.

Release Date
United States Department of Agriculture
Contact Name
Bjorneberg, David
Contact Email
Public Access Level
Program Code
005:040 - Department of Agriculture - National Research
Bureau Code
005:18 - Agricultural Research Service