Determination Of Hydraulic Resistance Under Regulated Flow Conditions Of A River Channel

Abstract

This article covers the problem of determining the hydraulic resistance of the water flow under regulated channel conditions in the lower reaches of the Amu Darya River. New empirical relationships have been developed based on the relationship between morphological changes in the riverbed, water discharge, flow velocity, and channel roughness. In the study, field observation data for the Tuyamuyun, Kipchak, Nietbaytas, Samanbay, and Kyzylzhar hydroposts were analyzed, and the relationship between water discharge and average velocity was determined based on formula (13). The results showed that with an increase in water discharge, the channel roughness decreases and the hydraulic resistance of the flow changes accordingly. The practical values of the calculated Shezi coefficient and the Darcy coefficient were determined, and their influence on the kinematic parameters of the flow was assessed. The obtained results are recommended for use in the design of water management facilities and in the refinement of hydraulic calculations in regulated channels.