Forecast of mud silting of vortex zone behind the transverse dam

Blind, through, combined transverse dams are widely used as regulation structures to protect riverbanks and regulate river channels. Under the influence of these structures, a redistribution liquid solid runoff, including suspended sediments, occurs. This article aims develop method for forecasting mud silting vortex zone behind dam. The concept coefficients siltation in width, area, volume is proposed assess degree siltation. minimum fall diameter within reverse branch depends on value inverse velocity, water depth, length zone. Velocities currents relative turbidity flow determined from equations conservation rate runoff. It assumed that deposits sediments occur branch, exchange with main occurs intense turbulent mixing. Calculated dependencies determine volumes passing through constraint section. Their ratio makes it possible portion settled sediments. An example calculations conditions dam No. 30 Amu Darya River was performed; thickness sediment layer during flood month 0.44 m, 1.94%