For most of us some kind of water supply system is needed to deliver sufficient water for our needs, and to deliver it every day. Water collected here rather than running downstream and thus was available for use - as a water source for fam animals, as possible irrigation water, and efen for domestic use. Increased use of agricultural chemicals has tended to make the water unsuitable for use in this way, so that the present role of most ponds for much of the time is as an erosion control measure - by storing water and intercepting sediment during time of flood, downstream erosion, and the loss of farmland, is reduced. Rivers are obviously a great source of water, but need to be controlled. Reservoirs and dams Like farm ponds but greater scale suggests other options for clean water.
Reservoirs have multiple uses - as considered in teh next section.
Underground water Wells for rural areas, and for extra urban water supply. Picture of well drilling. Recreation Fisherman on Mayo Lake Power boating Sailing, swimming etc 3.