The hydraulic efficiency of the soil channels

Abstract

The article is devoted to the improvement of hydraulic efficiency and exploitation reliability by improving the hydraulic parameters of soil irrigation channels, and given the results of the authors’ research in theoretical and natural conditions. The article illustrates the analyses of the current problems in the existing soil canals and their negative consequences due to the deformation processes in the channel bed and consequently the increase in flow dynamics and kinematics of hydraulic resistance. Based on the analysis of the results which conducted by Altunin V.S. Zheleznyakov G.V. Karasev I.F. Kosichenko Yu.M. and Mirtshulava Ts.E. in the assessment of hydraulic efficiency and exploitation reliability of the channels, the hydraulic efficiency and operational reliability of the canals have been evaluated. Researchers conducted in Tashkent and Big Fergana canals, which are located in different natural and geographical conditions. The study of deformation processes in soil channel bed provided with the help of XSLEM-Doppler (River Surveyor Live), the formation of flow dynamics and kinematics, and the activation of hydraulic resistance. Based on the study of the kinematic parameters of flow created a velocity diagram expressing the distribution of velocities by the depth of flow in the soil channel in natural conditions. The hydraulic friction coefficients for the Tashkent and Big Fergana canals were determined using the kinematic parameters obtained with the help of River Surveyor Live in natural field conditions, as well as the water permeability of the canals was assessed. Also, the speed diagram, which is one of the most serious problems of hydrodynamics, was built based on data obtained with the help of modern measuring instruments. Also, the study of the formation of kinematic and dynamic parameters in soil-based irrigation canals and the improvement of hydraulic parameters of irrigation canals based on conditions of hydraulic efficiency and operational reliability were concluded. The results of the study are important in the effective use of soil irrigation canals, increasing the reliability of water supply to consumers.

Calculation of filtration process in channels

“…Especially in PK-930 to PK-1040, the ground level is almost equal to the lower water level, and the volume of soil discharged in this part of the canal is greater than in other parts. The canal is trapezoidal in shape and changed its shape slightly as a result of a small sedimentation and erosion (Figure 3) [20,21,22]. This can be clearly seen in the line diagram of the project and actual scheme of the channel.…”

Groundwater Level Analyse In Urgench City With Using Modflow Modeling And Forecasting System

“…4b), the movement of real groundwater was twice as strong as at the surface at a depth of 10 m above the ground. In this stronger flow region, the direction is slightly northward [17,18,19,20]. In the conceptual modeling, the boundary conditions of the groundwater of the region were developed in digital form.…”

“…The program works accurately only when the data is entered in full. Therefore, the existing hydrogeological conditions require the development of a comprehensive database in the form of geographical information [13,14,15,16].…”

Mudflow hazard in the foothill and mountainous regions of Uzbekistan

“…About a thousand active mudflow channels have been counted on this territory, of which more than 270 descend into the Fergana Valley. It is necessary to take into account the fact that many mountain territories within Kazakhstan and Central Asia are still far from insufficiently studied in terms of mudflows [15][16][17].…”

“…Studies carried out by international experts provide evidence of a close relationship between climate change and an increase in the frequency and intensity of dangerous hydrometeorological phenomena leading to climatic disasters, which justifies the need for a comprehensive study of mudflow phenomena in the main mudflow-prone areas located in the basins of mountain and foothill rivers. In recent decades, research in this area has been Priority attention is given, since the creation of early warning systems contributes to improving environmental safety, protecting the economy, population and vital human interests from the possible negative impact of dangerous hydrometeorological phenomena and is of particular relevance [11][12][13][14][15][16][17][18].…”