Yeah, there are two rivers on either side of the map, my drawing skills are quite... bad. Both coming out of the Mountains. One essentially ends in the swamplands that are on the left side, although a much smaller version of the river escapes the swamplands at the southern tip, and is used primarily as irrigation. There is a lake, roughly in the middle of the world, feed by natural springs(freshwater lake). There are also, several wells dug throughout the cities. The whole area has large amounts of underwater water, envisioned to be similar to the Florida Aquifer system, if anyone is familiar with that.