I agree they won't be able to effectively sequester themselves forever. But I certainly expect them to try.

And the world will live as one

California will eventually have to on a war of conquest of the entire Colorado River basin.

By laying out pros and cons we risk inducing people to join the debate, and losing control of a process that only we fully understand. - Alan Greenspan

They use the same water system as the rest of the LA basin.  Golf courses may look 'purty' but then use a ton chemicals: herbicides, pesticides, & etc. as well as a many acre feet of water per acre to maintain that look.

"Ton" is not a metaphor nor an exaggeration.

US Golf courses are water wasting toxic stews built and maintained for the oblivious.

She believed in nothing; only her skepticism kept her from being an atheist. -- Jean-Paul Sartre

Pebble Beach: overpumping the Carmel River and Seaside aquifer. The entire Monterey Peninsula has been under Stage 1 water rationing since 1999, which so far basically means new development permits are almost impossible to get. The State Water Control Board has ordered reductions in that overpumping by 2014, and so locals are scrambling to build a desalination plant in either Marina or Moss Landing.

Pasatiempo/Santa Cruz: Same thing, overpumping the local watershed and aquifers. They too have probably overshot their carrying capacity and will need to turn to desal.

Just wait until global warming hits with full force and reduces the size of the Sierra snowpack. CA will get more rainfall, but can't store it all. The snowpack is the most important reservoir in the state and the rest of CA is soon going to lose it.

And the world will live as one