<b>GRUNTLI KANALLARNING MUSTAHKAM KESIMLARINI BAHOLASHDA SILJITISH KUCHI USULINI QO‘LLASH</b>

This article examines the problem of determining hydraulically stable cross-sections for open channels. The potential of using the shear stress method to ensure the scour resistance of the channel bed and banks is analyzed. The shear stress method is based on calculating the shear stress exerted by the water flow on the channel bed and walls. The article presents the main hydraulic parameters, cross-sectional geometry, and calculation formulas for open channels. The results obtained are significant for selecting the optimal geometric parameters of a channel. The shear stress method is one of the most effective approaches for calculating the stable parameters of open channels. Its application allows for the consideration of the flow's hydraulic characteristics, the channel's geometric parameters, and the soil's physical and mechanical properties, which prevents scouring of the channel bed and slopes. The initiation of sediment transport, which affects the stability of the open channel bed, is determined based on the Shields method, specifically through the hydraulic calculation of critical shear stress. Using this method in the design of irrigation and drainage canals enhances the reliability of hydraulic structures, reduces operational costs, and ensures the stability of channel processes during long-term operation.

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