system
Given the following post, respond as if you're commenting on Reddit:
human
What amount of water would you have to consume in comparison to the alcohol you consume to stay at optimum hydration?
gpt
Here is the problem. Alcohol inhibits water absorption by the kidneys. So since the kidneys are not picking up water, it doesn't matter how much water you drink compared to alcohol, once your blood alcohol level is past a certain point you will just urinate it all out. So if you drink a ton of water and alcohol you will be peeing like crazy! 

If you are trying to avoid dehydration when drinking a lot of alcohol your best bet is to just drink water before drinking to hydrate your self. Then   hour or so (based on metabolism) after your last alcoholic drink, consume a bunch of water. By the time the water reaches the kidneys your blood alcohol level should be low enough to absorb water.