In Southern Utah, which is part of the Mojave Desert, the farmers still doing plain old flood irrigation.
It's so staggeringly wasteful it's hard to understand
It's so staggeringly wasteful it's hard to understand
Flood irrigation here is just as bad as if they were doing it in Phoenix or Las Vegas
Underground aquifers fill over decades and centuries, and in this environment, almost always laterally, not from seepage from rainfall. I think the demand for proof needs to go the other way, honestly. Presumptively this water is pretty clearly "wasted".
The evaporation figures I can find range from 30% to 50%, which is hardly virtually all. I've never been to the Utah desert, but in the California desert I've dumped out water and watched it disappear into the ground. The absence of streams only indicates that seepage and evaporation together get all of the water that would otherwise flow in them.
> Underground aquifers fill over decades and centuries, and in this environment, almost always laterally, not from seepage from rainfall. I think the demand for proof needs to go the other way, honestly. Presumptively this water is pretty clearly "wasted".
Unconfined aquifers will fill as fast as rainfall can seep in, which depending on the area can be a lot less than decades.
How is letting the Colorado flow into the Pacific more of a "waste" than using that water to grow food and letting the excess seep into the water table and fall as rain on the other side of the Rockies?
And "disappearing into the ground" is absolutely not water entering an aquifer! All you get is wet dirt. Which then... dries out. Again, this isn't how aquifers work.
There's no free lunch here. Growing plants in a desert under the open sky requires a staggering amount of water. It just does. If you want to push efficiency measures look at greenhouses.
Are you confusing confined aquifers and unconfined aquifers? That's exactly how unconfined aquifers work. Where I live the wells never go dry because every time it rains they are replenished.
Maybe the desert doesn't have unconfined aquifers and that's why you're so strident on this? I really don't know, but I'm curious so please elucidate if you can.
If you stand on the border of the Mojave, you probably have one foot in the Great Basin desert that covers the west half of the state. The parent probably simply described or generalized to the wrong desert.
A climate map [1] shows that the only parts of the state which aren't desert are arid mountains; the Salt Lake area has a bit of lake effect snow but that's not in the Colorado River watershed.
[1] https://upload.wikimedia.org/wikipedia/commons/9/95/Utah_K%C...