[swaghauler]

I kind of like your water per period idea. Combining it with exertion makes good sense too. I think that rather than adding water for altitude or very low humidity (desert or cold weather), that these should be modifiers towards a CON check IF you aren't getting enough water.

A sample chart might look like this:

Temp 101F+
= 4 Liters per Period of Hard Work.
= 3 Liters per Period of Light Work.
= 1.5 Liters per Period of Rest.

Temp 76F to 100F
= 3 Liters per Period of Hard Work.
= 2 Liters per Period of Light Work.
= 1 Liters per Period of Rest.

Temp 25F to 75F
= 2 Liters per Period of Hard Work.
= 1 Liter per Period of Light Work.
= 0 Liters per Period of Rest.

Temp 24F or Less
= 2 Liters per Period of Hard Work.
= 1 Liters per Period of Light Work.
= 0.5 Liters per Period of Rest.


This would be my first take on Water Consumption per Period.