The impact of double flow regulation on morphological and hydraulic parameters of Amudarya riverbed
Ochiq kirish: yoʻq
Annotatsiya
About 2.3 million areas under cultivation are irrigated by the flow of Amudarya, which is one of the largest rivers in Central Asia. The river flows mainly in easily eroded soils. The paper is devoted to the establishment of functional relationships between morphometric parameters of the streambed and hydraulic parameters of the flow. The dynamics of the Chezy's velocity factor, hydraulic resistance, Chizy discharge coefficient in conjunction with hydrodynamic flow characteristic were established. The study revealed that measured and calculated values of the average flow rate add up, the dynamics of calculated and measured velocities depending on the flow rate was 0.20 m/s to 0.11 m/s, after the change of Chezy's velocity factor - 17.56 to 11.45 m 0.5/s. It was established that the integral characteristic of hydraulic resistance - Chizy discharge coefficient, for all years rapidly decreased with increasing water flow of up to 500 m 3 /s, and with a further increase in the water flow rate from 500 m 3 /s, Chizy discharge coefficient slowed down. At a flow rate up to 500 m 3 /s the Chizy discharge coefficient decreased from 0.24 to 0.01, i.e. 24 times lower. This was the maximum reduction that was set.
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