Irrigation canals are the main waterways that bring irrigation water from a water source to the areas to be irrigated. They can be lined with concrete, brick, stone, or a flexible membrane to prevent seepage and erosion.
An open canal, channel, or ditch, is an open waterway whose purpose is to carry water from one place to another. Channels and canals refer to main waterways supplying water to one or more farms. Field ditches have smaller dimensions and convey water from the farm entrance to the irrigated fields.