Model of the Effect of Geometric Parameters of Drainage Channels Adjacent to Suburban Roads on Flow Hydraulics and Sedimentation Reduction

The problem has been modeled in the SSIIM software environment. Based on the results of the study, it has been observed that the lowest horizontal velocity in the trapezoidal drainage channel cross section occurred for a drainage channel bottom width of 90 cm and a drainage channel wall angle of 75 degrees. Also, the maximum vertical velocity occurred for a discharge of 4 m3/s, and in this case, the highest amount of secondary flows occurred. It was further observed that increasing the angle of the drainage channel wall from 69° to 75° did not cause any significant changes in the shear stress values of the drainage channel cross-section. This is also true for the range of changes in the drainage channel bottom from 50 to 90 cm. In examining the effects of changing the longitudinal slope on sediment trapping performance, it was observed that increasing the longitudinal slope to 5% and 10% increased the sediment trapping efficiency. The highest efficiency at a slope of 10% was for the trapezoidal cross-section (52.3%) and the lowest was for the rectangular cross-section (42.8%). The MCDM method was used to determine the best cross-section. The trapezoidal cross-section with the highest score was evaluated as the best option.