The article discusses the process of sediment transport in channels under the influence of wind waves on the course. Based on the calculation method Quick M.C. dependences are proposed for calculating sediment transport in channels when waves are superimposed on associated and counter-current flows. The movement of sediments caused by the combined action of waves and currents is studied. It is shown that the direction of the movement of sediments is determined mainly by the direction of wave propagation (even in the case of a counter-current). Here the consumption of sediments is proportional to the power of the “wave flow” system. Comparing the results of the calculation with the dependencies of other authors gives satisfactory results.

On floodplain rivers there are characteristic features of the construction of hydrotechnical structures, which in their design should be done taking into account this. These are the different types of floodplain and other floodplain, changes in the period of floodplain inflow, the interaction of flow and floodplain flows, the ability of floodplain rivers to water, the speed of flow and the features of turbidity, etc. The main purpose of this study is to develop a method of determining flow parameters in a two-way compressed cross-section with cross-dumbbells in the floodplain, taking into account the different bias of the Ozen and floodplain as well as the interaction of flows Experimental studies were conducted for parallel case of two-sided poise Ozen and poise flow arrows. The width of the beams is 85 sm, the width of the beams is 30 sm, the length of the lath is 11 m, the slope is i=0.0005, the slope is n=0.016 and the parameter of the dumbbells is n n =0.023. The flow parameters are long F rp =0.01-0.3, R ep >10000, floodplain F rn =0.01-0.18: R ep >4000. On the surface, the change in the compression coefficient EPR in the cases of dumbbells installation angle α d <900 and α d ≥900 was found to be heterogeneous and analytical expressions and graphs were developed to determine their values. The formulas for determining the speed of flow in a compressed cross-sectional area were proposed, taking into account the subordination of speed scanning to the expression Shlixting-Ayramovich in the zone of interaction by applying the equations of motion and consumption preservation

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