What is baffle in V-Notch?

A baffle in a V-notch is a structural element used to control the flow of water in open channel flow measurement. It typically consists of a barrier or partition that helps stabilize the flow, reducing turbulence and enhancing the accuracy of flow measurements taken at the notch. By minimizing disturbances, the baffle ensures that the water level in the notch is more representative of the actual flow rate, leading to better data for hydraulic calculations.