<b>YON TOMON QIYALIQLARI HAR XIL BO‘LGAN DONADOR GRUNTLI TRAPETSOIDAL KANALLARDAGI SUV OQIMINING YUVMASLIK TEZLIKLARINI ANIQLASH</b>

This article presents new formulas for determining non-erosive flow velocities in trapezoidal channels with different side slopes formed in granular soil. The scientific novelty of the study lies in the development of an asymmetric method for calculating the wetted perimeter and obtaining a more accurate expression for the hydraulic radius. Laboratory experiments were conducted for six types of granular soil and various slope ratios. The average relative error between the calculated and measured non-erosive velocities using the proposed formulas was 4.2%. For the symmetric formula, this indicator reaches 11.8%. The obtained results can be directly applied in the practice of irrigation canal design.

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