Board Thread:General Discussion/@comment-24628295-20140303233920/@comment-4842859-20140306190421

Mud wells gain 1 portion every 45 seconds.

1 portion of water restores 10 thirst.

Your thirst goes down by 2 every 30 seconds.

1/45 = 0.02 repeating (portions/second)

0.02*10 = 0.2 repeating (thirst gain/second)

2/30 = 0.06 repeating (thirst lost/second)

0.2 - 0.067 = 0.133

0.133 > 0

Sounds pretty sustainable to me.