flume Synonyms

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