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Iran (Islamic Republic of)
Environment and health
Salinity is one of the biggest problems in the Islamic Republic of Iran. The total area affected by salinity and waterlogging is estimated to be about 15.5 million ha or 9.4 percent of the total country area. About 7.32 million ha have saline affected soils. Leaching, built into the irrigation network, has proved to be a successful way to treat these soils. Because of the existing high concentration of calcium in soils, it is possible to treat sodic soils with leaching without using any additive materials. No comprehensive study has been undertaken regarding the extent of irrigation-induced salinity, but it is estimated that over 2 million ha are salt-affected and/or waterlogged.
Although the extent is unknown, water-related diseases are prevalent in some irrigated areas where the water is also used for domestic purposes.