Determining the Shezi Coefficient Under Regulated Water Flow Conditions

Mirzabek Mirzaev; Ibragimov Ilhom; Inomov Dilmurod

doi:10.47134/scbmej.v3i1.5231

Authors

Mirzabek Mirzaev Bukhara State Technical University
Ibragimov Ilhom Bukhara State Technical University
Inomov Dilmurod Bukhara State Technical University

DOI:

https://doi.org/10.47134/scbmej.v3i1.5231

Keywords:

Amu Darya River, Regulated Flow, Chezy Coefficient, Hydraulic Resistance, Empirical Relationship, Morphological Parameters

Abstract

In the lower reaches of the Amu Darya River, the hydraulic regime has been significantly transformed under regulated flow conditions. The determination of the Chezy coefficient plays a crucial role in analyzing the kinematics and hydraulic resistance of the river flow. Based on field data obtained from Tuyamuyin, Kipchak, Niyetbaytas, Samanbay, and Kiziljar hydroposts, empirical relationships between the Chezy coefficient, discharge, and morphological parameters were developed. The analysis revealed that conventional formulas proposed by Manning, Forchheimer, Pavlovskiy, Agroskin, and Jeleznyakov showed considerable deviations under regulated conditions due to nonuniform depth distribution and increased roughness coefficients. The derived relationship for the lower Amu Darya provides improved accuracy in estimating the Chezy coefficient compared to classical methods. This approach enhances hydraulic computations and offers a practical basis for riverbed regulation and hydraulic design in managed flow conditions.

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