Here are some ... How much water do we need to drink a day? This Q has posed much debate and confusion among professionals and the public. To sensibly deal with this conundrum, please peruse the article in http://formefirst.com/waterdrink.html. Thereby, you'll gain some useful insights to decide how much water you would consume.
Yes. You are probably eating as well and that adds to the bodies water intake. The mechanisms of the body are designed to provide homeostasis - a steady equilibrium. This includes the maintainence of a constant salt and water level. Your kidneys will remove the excess water to keep this balance and so urinary outflow will increase.