There are many ways of finding omens with the use of water. The appearance of a spring or pond, ripples on the surface caused by wind, rain etc. for example.

Hydromancy is divination based on the movements of water after a stone or piece of wood has been thrown into it. To find answers to specific questions a person would ask their question and count the circular ripples caused by throwing a stone into water or watching the ripples caused by a rain drop. An even number of ripples would mean a positive answer, an uneven number a negative one. The direction in which a piece of wood floated on still water also held it's own messages.