The objective of the research is to evaluate the accuracy of calculations obtained by proposed equations for reduced filtration discharges in the body and foundation of canal dams at permeable foundation. The experimental study was conducted by the method of electrohydrodynamic analogies (EHDA) for different values of embankment height which were carried out using apparatus EHDA-9/60 according to the technique for study non-pressure movement of filtering flow. For simulating by EHDA method, four electric models of conductive paper with resistance R = 4000 ohms were made. After the experiment, depression curve position was established, hydrodynamic nets were plotted, and filtering discharges for each of four electric models were determined. Comparison of calculation results according to proposed equations with results obtained by EHDA method (at the equal filtration coefficients in the body and foundation of canal dam) has shown close values with the divergence within 2–5 %. At water depth in a canal h0 and embankment height H, which equal to one conventional unit, the reduced filtration discharge q/K by EHDA method was 0.796 conventional units, and according to proposed equations – 0.820 conventional units, while the divergence of the results was within 2.93 %. Thereby, we consider possible using of proposed equation for reduced filtration discharges, veracity of calculation according to them was confirmed by the results of experimental study by electric simulation method.
Keywords: filtration, canal, dam, embankment, pressure gradient, hydrodynamic net, filtration coefficient, filtration discharge.
