Calculation of the consumption of pumped water for filtration when watering cotton

In Uzbekistan, in recent years, there has been a shortage of water resources used for irrigation. Therefore, during the growing season, it is necessary to use possible additional sources of irrigation. Such waters can be water pumped out from vertical drainage wells. The object of the study is land irrigation pumped out from vertical drainage wells by pumped water in the Fergana region in the economy of Musazon Ismoilov. Irrigated crop-cotton. The research method is used to estimate the size of the absorption of clarified and turbid water in the furrow by applying a mathematical filtration model. For the distribution of turbid flow velocities, the distribution of turbid flow according to OG Natishvili was considered, and the flow rate flowing through the cross-section was determined. Scientists and specialists have found that when using groundwater pumped out by vertical drainage wells, due to their clarity compared to irrigation water containing suspended sediments (i.e., turbidity), more intensive absorption occurs. For uniform moistening of the field, it will be necessary to increase the supplied irrigation rates. According to the application of a mathematical model, it was found that the speed of the turbid flow is greater than the speed of the pure flow. This is because 15-20% of the flow rate of clean water (pumped out of the vertical drainage well) goes to filtration. With the result obtained, it can be concluded that the water pumped out from vertical wells can be used as an additional source of irrigation in case of a shortage of water resources during the growing season.