What if you keep drinking a lot. Then you wouldn't lose water weight, right?
If you stop drinking, you'll loose water weight, yes. Eating won't effect that. If you stop eating, you'll just get weak. And loose actual weight while your body burns fat, and then muscle. Don't do that. Stay healthy.
If you keep drinking, no, you won't loose water weight.
You need to eat in order for your metabolism to activate and burn calories.
I'm not sure about the water thing though. Common sense would dictate yes, but I don't know anything about that.