Using Four Types Of Notches For Comparison Between Chezys ConstantC And Mannings Constant N

Abstract In this technical paper Chezys and Mannings constant were compared using four different notches on the plain bed. The first phase of this paper involves designing of the notches using Auto Cad software followed by fabrication. The second phase involves carrying out Experiments in open channel Laboratory by using hydraulic bench. The final phase involves calculations of Chezys and mannings constants. It was seen that Chezys constant is directly proportional to actual discharge While Mannings constant in inversely proportional to actual discharge. Chezys constant has higher value compared to Mannings constant value. Also Mannings Standard deviation is smaller compared to that of Chezys. This indicates the accuracy of the resistance coefficient due to the fact that the smaller the value of standard deviation the higher the level of accuracy. Therefore the coefficient of resistance is more adaptable simple and accurate in Mannings constant.