Disclaimer
Using these calculators to estimate your water use for a WRIA 1 Adjudication Court Claim Form does not guarantee that the Washington Department of Ecology will accept the quantity submitted. Ecology retains the right to review all estimates and the Court will make all final decisions. These water use calculators are for general information only and based on federal guidance, state guidance, and/or other references. Calculations are estimates that may be sufficient in many circumstances but are not meant to reflect exact water usage.
Whatcom County disclaims any warranty of merchantability or warranty of fitness of the information or data generated by these calculators for any particular purpose, either express or implied. No representation or warranty is made concerning the accuracy, currency, completeness or quality of data depicted. Any user of these calculators assumes all responsibility for use thereof, and further agrees to hold Whatcom County harmless from and against any damage, loss, or liability arising from any use of these calculators or the resulting data.
One Station Irrigation Water Use
One way to estimate average annual irrigation water use is to use the One Station tool developed by land grant universities in Washington, Idaho, and Oregon. This is available on the Irrigation in the Pacific Northwest webpage.
See the instructions Whatcom County developed on how to use this tool.
Irrigation Demand Calculator
The calculator below allows you to calculate the irrigation demand for a desired crop based on irrigation method and crop seasonality as designated by the Washington Irrigation Guide (WIG) and Department of Ecology’s GUID-1210. The Total Irrigation Requirement (TIR) output (given below) reflects the estimated amount of water you would need to supply adequate water to your crop and is a key piece of evaluating irrigation water use.
See Irrigation Demand Calculator Frequently Asked Questions for more details on how it works.
