Sad part is, a huge portion of agriculture is to feed animals which then become our meat. It is just not sustainable. The best way to conserve water is to eat less meat. This book has lots of interesting numbers - http://www.amazon.com/Meatonomics-Rigged-Economics-Consume-S...
+1 you are exactly right on this. It takes about 10 times the water and 10 times the energy to eat mostly meat.
I would argue that a mostly vegetarian diet is healthier also. One problem is that it takes some degree of skill to cook a delicious vegetarian meal, but is fairly easy to make a tasty meal out of meat.
Meat consumption is a hugely unpopular topic. Take just this HN thread for example. There is way more discussion on crops like almond, than on meat and dairy industries. Meat and dairy consume way more resources than any crop/food grown for human consumption.
We can water our lawns less, and take showers once a week. It will not make much of a difference until we eat less meat. Same goes for sea food too. We are literally eating some of the fish species to extinction - it is just sad.
Seriously, the article was about almonds. That's why the discussion is more focused on almonds than meat and dairy, or even some of the crops people are more aware of in California's agriculture, like strawberries, grapes, or avocados.
If agriculture receives almost no restrictions on water use from the state while residential use is slashed, it puts the burden on the people with the least impact. Sure, go around and cite people for watering their lawns and washing their cars, but I'm paying through the nose for water that was imported across state lines and they're planning to implement toilet-to-tap while the corporate farmers are sucking up the groundwater and using it to grow cash crops for export.