Ways to save water resources in rice systems in dry years

The article describes methods of improving the regime for saving water resources in rice systems in dry years. The greatest impact on the volume of water supply and runoff is exerted by the spring flooding of rice fields in May-June. Filtration from the canals has a great effect on the groundwater regime, rises the level of groundwater in the canal zone, causing flooding, waterlogging and salinization of territories adjacent to the canals, up to their withdrawal from the agricultural use. Filtration losses from the interfarm and on-farm networks depend on the frequency of works, the type of soil, and the degree of turbidity of the irrigation water. The study substantiates the methods of improving the regime of saving drainage and discharge runoff in rice systems in dry years. The irrigation methods remove salts from the upper soil profile layers during groundwater mineralization up to 5 g/l, and irrigation is of a desalination nature.