Spring Discharge Measurement; How a Parshall Flume Operates. A Parshall flume is a fixed, hydraulic structure that is placed in a flow stream to determine the flow of water. The flume accelerates flow by both a contraction of the parallel sidewalls and a drop in the floor elevation in the throat.
Log flume. A log flume is a flume specifically constructed to transport lumber and logs down mountainous terrain to a sawmill by using flowing water. These watertight trough-like channels could be built to span a long distance across chasms and down steep mountain slopes.
Many flumes took [when?] the form of wooden troughs elevated on trestles, often following the natural contours of the land. Originating as a part of a mill race, they were later used in the transportation of logs in the logging industry, known as a log flume.
Navigable canal flume Edit A bypass flume on the Chesapeake and Ohio Canal In some nineteenth-century canals, a bypass flume diverted water around a lift lock from the level (or pound) above to the level below the lock, so that the level below would have sufficient water.
The use of flumes in log transportation has been so popular, that it is given precedence to other forms of transport. These flumes can run for several miles, transporting logs from forests to sawmills located downhill. Recreation. Recreational flumes are used for fun activities such as water games.