KINEMATIC WAVE NOMOGRAPHS FOR TIME OF CONCENTRATION AND LAGTIME.
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THE TIME OF CONCENTRATION AND LAG TIME ARE, THROUGH KINEMATIC WAVE THEORY, RELATED TO RAINFALL EXCESS, WATERSHED LENGTH, SLOPE AND ROUGHNESS. THE KINEMATIC WAVE NOMOGRAPHS FOR TIME OF CONCENTRATION AND LAG TIME FOR OVERLAND FLOW ON PLANE WATERSHEDS ARE PRESENTED USING MANNING, CHEZY AND DARCY-WEISBACH ROUGHNESS COEFFICIENTS.