Practical reference pages for irrigation designers, pump and irrigation retailers, and water professionals. Each worked example shows its units, assumptions and the checks still required.
Guides & worked examples
Choose a calculation to work through
Follow the inputs, equations and assumptions before working on a project design.
Pump sizing and selection calculators
How to size an irrigation pump
Build a duty point from the operating zone, elevation, pressure and losses before comparing pump curves.
Read the worked examplePipe sizing and friction loss calculators
Irrigation pipe sizing and friction loss
Compare true internal bores, calculate velocity and account for both pipe and fitting losses.
Read the worked exampleField and crop irrigation calculators
Drip irrigation design: demand, flow and run time
Translate a crop water requirement into daily volume and run time, then identify the lateral pressure checks.
Read the worked exampleHow to use these guides
Read the assumptions before using an equation. Follow the links between crop demand, pipe losses and pump duty to see how one decision affects the next. The numerical cases are static educational examples; they do not run the subscription calculators.
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