I just embarked on a map with 2 naturally spawned ponds, each 1x1. There is no other source of water. (With use of dfhack with a cheat I found that there was no water.) So I decided to create an artificial pond in the meeting area and fill it. It's done - I used a pump to clear the water. But, will this one tile of water [5/7] suffice my fortress needs ?
The pond a got dried out in an attempt to increase its size for rain water harvesting.