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.