One of the first things I do with the top comment of any topic on any platform is to question it with great scrutiny before choosing whether to send it up, or down, or leave it as it is... or to comment
about that comment myself.
Your comment, which I found at the top of the stack here, did not survive the first pass of that scrutiny.
> It seems like it would be more effective to simply put all the solar panels in a field,
Yeah, sounds nice. But the desert surrounding popular parts of California does have natural life. It has life whether it is owned by someone (who can make a stand to say "No"), or it is owned by the public. The life there doesn't know.
But that desert life, even when it it seems insignificant, still needs light in order for it to survive. It has a very narrow ecosystem in which it can survive.
> and construct a cheap shade over the entire canal no?
This is what a cheap shade over an artificial canal tends to look like when it is meant to survive the elements. (This particular shade under discussion just happens to also to produce electricity from solar energy.)
> The supports in the picture are massive
As they would also be for a shade
> and don't look cheap.
None of these activities are ever cheap.
> Also I would imagine the solar array uses more copper than a similar capacity array just built in a field.
It's good that you can imagine things. Some people are not so-blessed.
> You can't daisy chain multiple miles of solar panels together, so you need an extra power line to run alongside the whole thing.
Oh. So, you caught everyone with their pants down! So clever. Big Copper should be very ashamed of themselves right now because, by way of your plan, the gigantic expense of copper for a large solar farm has been increased to a slightly-larger expense! The entire ploy to cover the canals was a sham all along that was motivated by selling more copper!
Please, tell me: Would you want to receive the Nobel prize directly, or would you rather be seclusive and receive it by proxy?
> Put the solar panels in a field: The solar array uses less copper.
You're free to spearhead a movement to do that yourself, if you're so-inclined.
And hey! When you do, then at least some of the water supply canals will be already covered! That hard part will have already been done. Win-win!