Influence of worn open channel (drain) on manning's coefficient / Mohd Helmi Mualib

The basic aim of the research is to provide a reliable results from the laboratory experiments. U-shaped drains and plywood platform were made. The experiment was carried out by installing the platform in the flume first and then putting the precast U-shaped drains on top of the platform. The flume is situated in the Hydraulic Laboratory of Department of Civil Engineering, MARA Institute of Technology, Shah Alam, Malaysia. The criteria of the project was based on the equation developed by Robert Manning. The data of the experiments were analyzed and comparisons were made -with the available Manning's Roughness Coefficient, n for worn drain.