SEEPAGE LOSSES

A measure of water losses in a conveyance system due to water being seeped into the surrounding soils. Seepage losses from canals and other conveyance systems depend on: (1) the permeability of the surrounding soil; (2) the wetted surface of the canal; and (3) the difference in level of the water in the canal and the adjacent groundwater table. Broadly, the seepage losses range from 15-45 percent of diverted flow for unlined canals and from 5-15 percent for lined canals.