Regulation of the flow in the area of the damless water intake

The article discusses the results of numerical studies flow Amudarya river above point damless water intake to head structure Karshi Main Canal-KMC. system two-dimensional equations hydrodynamics-Saint-Venant is used as basis mathematical model. In this work, a series calculations field currents in channel during low-water periods carried out. Below are main research and proposals for ensuring stable operation conditions. applicability model composed shallow -the vector equation conservation momentum scalar mass, has been proved, when describing with presence circulation zones, which typical constrained by blind dams. case, solution pulsates around certain average value, length zone behind sudden expansion open good agreement laboratory experiments. Numerical have shown that device jet-guiding dam 150 m gate CMC more effective than located 250 above. essence, № 2 65 does not affect conditions at KMC all, 120 almost equivalent its impact on №1 50 m. Analysis shows placement an additional threshold bed improves situation raising level intake. flooded even low levels, reduces speed load body. At same time, directly beginning channel, part protect from incoming sediment, high enough glistening over line, ensure transit sediment can reduce enters Such measures will turbidity entering channel. This, turn, intensity silting process.