The given picture shows the information about pitchback water wheel. To begin with, there are three main parts in the picture, including flume, wheel and trail race. According to this graph, on the top of the image, there is a horizontal flume which water flow passes through. Last but not the least, the water flows through launder, reaching the wheel which is represented in the middle area of the picture, pushing the wheel to rotate anticlockwise. The tailrace is collected at the bottom. In conclusion, this is a really useful but simple structured facility.