Irrigation in the Pacific Northwest

Water Supply Design

This provides an estimate of the water flow requirements to replace water lost to evapotranspiration. This can be used to size pumps, water meters, or design irrigation systems.

Learn more about the units used on this page.

Minimum Water Requirements

Peak Crop Watering Rate:
Available Operation Time:
System Efficiency:
Minimum Water Supply Requirements:


Total System Capacity Requirements

Calculate the minimum water requirements, then use your irrigated area to find the total capacity requirements for your system.

Irrigated Area:
Total System Capacity Requirements:






WSU Prosser - IAREC, 24106 N Bunn Rd, Prosser WA 99350-8694, 509-786-2226,