You cannot escape the vortex of opinions about water scarcity in the Western United States, especially in the drought-stricken Colorado River Basin. Agriculture is the villain in many of these editorials. Agriculture uses too much water, so it should use less, is the refrain. We all wish it was that simple. But, yes, the editorials have a basis. Irrigated agriculture accounts for more than 50 percent of all Colorado River Basin water consumption, and roughly 60 percent of that use is to produce alfalfa and grass hay for dairy cows and cattle. These farmers have “senior rights” to use the water for agricultural purposes. This is also called, in the vernacular of our legal system, “prior appropriation” and was develope...