Establishment of additional norms for irrigation water

¹ “Tashkent Institute of Irrigation and Agricultural Mechanization Engineers” National Research University, Kary Niyoziy str., 39, 100000, Tashkent, Uzbekistan
² Scientific research institute of irrigation and water problems, 100187, h. 11, Karasu-4, Tashkent, Uzbekistan

^* Corresponding author: mzulfiya.k@mail.ru

Abstract

Due to the scarcity of water resources, there is a need for an additional source of irrigation. Drainage waters can serve as such sources. To use these waters, it is necessary to develop a number of measures. The aim of the study is to reduce the negative consequences by increasing the norms of preventive irrigation. It is vital to fulfilling the tasks set: calculation of additional water supply rates and irrigation regime when designing the use of drainage water for irrigation. As a result of field studies and according to the methodology of classifications developed by the Central Asian Research Institute of Irrigation (SANIIRI) analysis of the suitability for irrigation of pumped water from vertical drainage wells in the areas of the Fergana region. Studies conducted by scientists in Central Asia have shown that one of the methods to prevent soil salinization in the intra-contour use of collector-drainage water is the requirements with the following conditions: the ratio of total water supply to total evaporation and the ratio of drainage flow to the water supply. Taking into account the established coefficient, the irrigation rate must be increased depending on the mineralization of water and the mechanical composition of the soil.