Determining Coefficient of Discharge and Coefficient of Roughness for Short Grass Bed and Concrete Bed

Abstract

This study carried out to determine the coefficient of discharge and coefficient of roughness for short grass bed and concrete bed in an open channel at Hydraulics laboratory. The open channel on the hydraulic bench is intended to depict an actual open channel flow scenario; therefore steady flow was used for this experiment. From the investigation, it was evident that coefficient of discharge for grass bed and concrete bed ranges between 0.00218 and 0.0539. The slope of the channel was found to have no effect on coefficient of discharge. Manning's Roughness Coefficient "n" was found to increase with the decrease of discharge. Concrete bed has higher coefficient of discharge and lower coefficient of roughness when compared to short grass.

Acclimatize experimental approach to adjudicate hydraulic coefficients under different bed material configurations and slopes with and without weir

“…Hydraulic coefficients play a critical role in the design and analysis of open channel flow systems. They are used to characterize the behaviour of water in channels and provide important information for designing and managing various water structures [ 1 ]. These coefficients are essential for designing and optimizing the performance of water structures such as canals, sewers, and dams.…”

“…By considering the hydraulic coefficients, engineers can ensure that the flow characteristics and energy losses in these structures are within acceptable limits, leading to efficient and safe operation [ 2 , 3 ]. Dam design, irrigation and drainage network planning, flood simulation, sediment transport, urban water supplies are considered on flow measurements and computed hydraulic coefficient ([ 1 ]; Ahmed et al, 2017; [ 4 ]). The Manning roughness coefficient (n) is a key parameter in open channel flow analysis and design.…”