Dugouts are earthen excavations designed to store water for use during drier times. Typically, reservoir capacity ranges from a thousand to tens of thousands of cubic metres. Reservoirs are water sources of necessity, because of the uncertainty of filling caused by annual variations in precipitation, and/or the problem of maintaining water quality. Dugouts vary on how they are supplied or capture water. Some of them will require a water license from the Province to divert and store water from a stream.