FEATURES OF HYDRAULIC AND FILTRATION CALCULATIONS OF THE DRAINAGE AND IRRIGATION SYSTEM

Abstract

Calculations of the main characteristics of the conducting network of the drainage and irrigation system are given. The method of hydraulic calculation of the conducting network of the trapezoidal cross-section to be reconstructed is presented. The following data are taken as the initial data: the depth of the flow, the area of the live section, the wetted perimeter, the slope of the channel bed, the roughness coefficient. In this case, the roughness coefficient should be specified according to the reference data, taking into account the state of the riverbed. The following channel parameters are subject to calculation: hydraulic radius, Shezi coefficient, average flow rate and water flow rate. Based on the results of the calculations, average flow rates and water consumption are given in a tabular form, and graphs of the dependencies are constructed. The method for determining water losses from main channels in the earth bed includes the determination of the weighted average filtration coefficient of the ground base according to surveys (drilled wells), the calculation of free filtration, and then taking into account the close occurrence of UGV at a depth of 0.3-2.5 m, the propped filtration is determined according to SP 100.13330.2016 and the efficiency of the channels is calculated. Based on the results of hydraulic calculations of the main channels of the drainage and irrigation system, the main hydraulic characteristics for the main channel of the MC are obtained at the roughness coefficients for the morphostore 1 n = 0.030 and for morphostore 2 n = 0.040. For the main channel MC2, the characteristics are obtained at n = 0.040 and n = 0.030, which differ significantly from each other. For the main channel MC2, the characteristics are obtained at n = 0.040 and n = 0.030. For the main drainage collector of the gas turbine engine, the results of the hydraulic parameters are given at n = 0.040, n = 0.055 morphostvora 4. According to the results of filtration calculations, the values of fi ltration losses from the main channels were obtained for propped filtration, when the UGV is in the range of 0.3-2.5 m, the efficiency of the main channel was h = 0.971 ìê , what exceeds the standard value for the joint venture 100.13330.2016 – h = 0.90 íîð . The summary results of filtration calculations are presented.