During the construction of open drainages, to achieve economic efficiency, it is very important an accurate assessment of their parameters and projection size. The article is devoted to the creation of a mathematical model by taking into account the variability of flow movement and discharge rate in open drainages. The appearance of a mode of uneven movement as a result of the influx of infiltration water from the sown area to the drainage is described. Recommendations are given for determining the hydraulic parameters of drains. To study the movement of water flow in open drainage, the results of studies in the Boevut drainage system of the Syrdarya region are disclosed. The results of the analysis of the studies are presented. Based on the analysis results, a method for designing open drainages is proposed. The hydraulic parameters of the constructed new open drainage are determined in field conditions. The data determined in the field conditions are compared with the values of the proposed design method. Based on the comparison results, the reliability of the proposed design method was evaluated.

The article describes the influence of the exploitation condition of the reservoirs on the hydraulic parameters of the Big Fergana main channel in Fergana valley. Fractional and variable chemical composition of the sediments flowing with the water into the reservoir as well as their changes during the growing season is considered to be the main factor of this process. As a result of field experiments, it was found that the main share of sediments flowing into the reservoir consists of sand particles with a size of 0.01-0.1 millimeters. Analysis of the working effectiveness of the reservoir showed that 45-50% of these particles are kept within the reservoir, while the other pass further to the channel. Surveillance and experimental studies on the reservoir are mainly based on sedimentary particles of 0.10-0.05 and 0.05-0.01 mm and their water content is around 71-85.4%, with a larger size of 0.1 mm. and sediments with a diameter greater than the average for most of the aquifer. The obtained results indicate the influence of the sedimentary water reservoir on the hydraulic parameters and functioning capacity of the Big Fergana channel.

Currently, in the country developed models with using on GIS technologies are mainly based on linear schemes of location and mapping of water resources, and there is no database for determining the state of water resources, hydraulic structures, and river and riverbed deformation. The main problem with the use of GIS models in water management is their low accuracy, the fact that created models were based on low-resolution satellite imagery and used old analytical techniques. Models in irrigation systems which used GIS technologies are one of the problems waiting their solution. In this article analyzed possibility of GIS estimation of deformation processes in the river bed (in case of Sokh River). The processes in the riverbed were analyzed based on satellite data and compared with field experiments. Given conclusions based on analysis.

When dams are built, sedimentation accumulation starts in high-fuzzy; after filling of dead volume happens, blurring of useful volume, and the efficiency of the reservoir decreases. In this research, the Chartak reservoir in the Namangan region. In this study, the ArcGIS application was used with the ArcMap program. Originally Sentinel 2 Satellite images were downloaded free of charge from Glo Vis US official website. The unstable reservoirs were selected for the length of the reservoir. For each reservoir, the dependence of the water level on the flow rate was calculated, thus analyzing the sediment movement. The research results showed that 10 control points were taken, where Q was the same. In the first control point, in which all value was a bit lower than others, Q was 5, followed by 310 in B, 3.4 in H, omega had 1081.3, and 4.6 in ϑ.

In this article, were studied sediments in the Mirishkor main canal. Were identified erosion processes resulting from water movement in the main canal with using GIS. Sediment layers in the canal water flow were identified as factors influencing the flow of the sediment through the ArcGIS 9.3 program. One of the main obstacles in the main canals is the analysis of the results of the deposition of suspended particles in the water at the bottom of the canals using geoinformation systems. The dependence of suspended particles in canals on water discharge and canal topography has been partially analysed. In the Mirishkor main canal area sediment washing core equal to an average of 9.2 tons per year, i.e. a potential erosion process is happening in this channel. As a result, the contribution of sediment flow in the canal water increases and causes a number of complications. According to the results, the particles in the upper part of the main channel move depending on the water discharge.