Originally Posted by
arthwollipot
T...Again, you can tell very easily how much water you need by looking at the colour of your urine. If it's dark, grab a quick glass. That's all there is to it.
Actually, there seems to be quite a lot more to it than that.
Drink when you're thirsty is a good gauge,
how often you need to urinate is a better gauge.
When working in extreme environments (cold, high or hot), we would use the whole urine color thing as an "advertising" reminder for workers to hydrate regularly. It is more of a meme than an accurate medical diagnosis.
ETA: I have not read your blog on the subject, so you may have covered the above.