From the publisher:

Flooded Caves Vol. 2 adds new features and versatility your subterranean settings. No longer do your flooded caves have to stagnate on a single water level. In this 25 tile set water flows down chutes, cuts through stone ledges, and rushes over waterfalls, bringing new dimension to your adventures. e-Adventure Tiles: Flooded Caves Vol. 2 is designed by RPG cartographer Edward Bourelle for use with your favorite RPGs and miniatures games.