Study on Flow Controlled Channel Measurement Device

Based on the measurement principle of thin-plate weir flow,a new type of channel measurement device with adjustable stage-discharge was designed.Through the experiments,the free discharge theoretical calculation formulae of the flow measurement device were fitted under six different angles of elevation,and the relational curves of the flow and the weir head were drawn.The results showed that there was a good correlation between the flow and the weir head with maximum relative error 3.83%.At the same flow,the smaller the angle of elevation,the larger the weir head.The critical submergence degree of the device was more than 0.90.Equipped with water level control and flow measurement function,the device could be applied to replace channel intake gate and check gate.