I'm normally not this rude, but I'm feeling a little put off by you, so I will take my gloves off this time to set you straight.
A few facts for you idiot.
Sure, fucktard. I'm listening.
1) Californias water problems are house made and not solveable by desalination plants, I doubt they would ever be economical in relation to just start with 'saving water'.
Adding together all the water savings every year since the conservation programs began over 20 years ago, you get slightly less than the 5 *billion* gallons a day which are used in the Sacramento Valley *alone* for growing rice for export, to cover evaporative losses from the paddies.
Or, you know: you assholes could grow your own food, since almost all that rice is grown for export.
Or you could build some reservoirs, but well, that would involve the government, needs tax money, god forbid the government actually doing something for the people.
Reservoirs interfere with the mating cycles of fish, and in particular, Pacific Salmon, but also with a number of endangered species.
While I think it would be great for the people in Los Angeles to get off their collective Hollywood asses, and build some cisterns, instead of directing all their rainwater runoff into the ocean, that would only make a small dent in the problem, since the primary problem is that California grows about 1/5th the food eaten in, and *exported from*, the U.S., and uses a lot of agricultural water to do it.
By the way: it's the same people who care so much about the fish that they are actually tearing down reservoirs and dams to save their habitat, who are violently anti-nuclear power.
2) Germany is a net exporter of energy, allways was and likely allways will be. That includes for most of the time France, there are only a few months in a row in 2013 or 2014 where we where a net importer versus France. Germany is exporting 30% - 50% of its energy production to the EU, you idiot.
See, that used to be true when you were running nuclear plants, but according to this Bloomberg article, that stopped right after you idiots shut things down after the Fukushima disaster because, you know, all your plants are in coastal areas subject to tsunamis, and you stupidly did what TEPCO did, and failed to upgrade sea walls and safety systems.
Oh wait. Your plants aren't actually in any danger from this.
Why did you idiots shut them down again? It's hard to believe that a country that birthed nuclear physicists of the like of Einstein and Heisenberg would be quaking in their boots over a problem in Japan caused by greedy middle management.
3) look on a damn map. How retarded can one be and claim that Parkistan is using 'thermal waste to desalinate water' ... and why should they? Again, look on a damn map where Parkistan actually lies.
"Pakistan has a 1,046-kilometre (650 mi) coastline along the Arabian Sea and the Gulf of Oman in the south"
I thought Germans were supposed to be good engineers. You are also aware that desalination is a generic term for water purification from various impurities, and can be applied not only to sea water, but also to well water, and waste water from other sources, right? Not that Karachi isn't on the freaking Arabian Sea anyway, as opposed to being land-locked, like you are trying to imply.
P.S.: Yes, that desalination plant was subsequently built at the Karachi nuclear facility.
4) The efficiency of pumped storage and lithium ion batteries is more or less the same, no idea why you disagree about stuff you simply can read up on wikipedia (pumped storage a bit above 89% and lithium ion batteries a bit above 90%, both depending on all the components involved, oops, you assumed lithium ion would be less efficien? Why? On what physical fact could that be based? )
Energy density of the storage, and the preexisting hydroelectric facilities having already had the land area committed to the water storage. It's call a parasitic use for an existing sunk cost. Like when Pakistan's Karachi nuclear facility takes its waste heat and desalinates water with it, instead of just directly using the atmosphere as a heat sink.
However there are countries/places where nuclear plants are used for dessalination, not really because of the lack of fresh water, but more because of savings if you build one combined plant instead of a water plant treating fresh water and a power plant. Parkistan is not sucha country ... with nuckear power below 5% of the contries power consumption and one of the countries with absolutely no fresh water problem ... that would be more than nonsense.
Here's a picture of the Karachi nuclear desalination plant for you. You can understand pictures, right?
I think that about covers disassembling your posting.