OpenET

OpenET is an website tool that provides data for U.S. water management on 17 western states, most notably the area covered by the Colorado River basin. The "ET" in OpenET stands for evapotranspiration, which is the process through which water leaves plants, soils, and other surfaces and returns to the atmosphere. It's a measurement that farmers can use to estimate the amount of water being taken up or used by their fields and crops and that will usually need to be replaced through irrigation or rainfall.