Part of the land that is waterlogged because of irrigation. Waterlogging is the state of land in which the water table is located at or near the surface, resulting in a decline in crop yields. Irrigation can contribute to the raising of the level of the aquifers. The non-saturated area of soils can become too small and the soils are over-saturated with water. If recharge to groundwater is greater than natural drainage, there is a need for additional drainage to avoid waterlogging.