Irrigation in the Pacific Northwest

Historic Average Water Needs Estimate
One Crop, at All Stations

Calculates and displays the annual total mean ETr, Pt, Pe, ETc, and IWR for the chosen crop at all stations.
This uses the 21 point crop coefficients that are based on Day of Year. Because of this, these numbers are most applicable to the Columbia Basin. Go here for more information.

Crop Name:


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