flume Synonyms

gulch racecourse spillway sluiceway sluice shute sewer ravine race pore pipe penstock passageway passage outgate notch moat spout tailrace wadi nullah raceway watercourse creek bed cwm weir waterway water gate vomitory vena valley tube trough trench tedge lock-weir ingate couloir conduit col clough cloaca cleft chute chasm channel canyon canal bed arroyo