Open channel flow is exemplified by the flow in rivers and canals. The most important information required in water resources engineering is discharge when constructing any structure on a river, canal, or for flood prevention. Open-channel discharge measurement differs from closed-channel discharge measurement. This course's primary goal is to educate students how to measure discharge in an open channel and to familiarize them with some of the words and phenomena related to open channel flow that they will encounter in their future practical work.