So? The quantity of rain used in irrigation does not rise to the quantity necessary to lubricate even 2000 democrat dry farts.
Thats the point. Man over states himself. The evaporative quantity in irrigation could not possibly change the moisture content of a flacid democrat lefty arse in Springtime, let alone water the entire Southwestern desert.
I asked for numbers, and this is what you post? You are now proven worthy of no further consideration. Congratulations. I will save this post for future examples of your technical ignorance.
You're lazy too. The first Google search I did yielded the numbers. The California Aqueduct delivers 1.5-1.7 million acre feet per year. This is the equivalent to about four inches of rain per year. This is in addition to well water and water from the Southern Sierra reservoirs. According to the USGS, the peak rate of well pumping in the 1970s was 8 million acre feet per year. That amount has been since reduced to recharge the basin. Total irrigation in the Valley was sufficient to cause as much as 28 feet of surface subsidence, having lowered the water table by as much as 100 feet.
It's a lot of water, most of it lost by transpiration. It grows some 25% of America's produce. I have little doubt that much water transpiration could influence precipitation downwind. It might even be a good thing if we learn how to use the atmosphere to recycle the moisture across the landscape.