Flume
Flume (f;ūm) , noun
[Compare Old English flum river, OF, flum, from Latin flumen, from fluere to flow. r84. See Fluent.]
A stream; especially, a passage channel, or conduit for the water that drives a mill wheel; or an artificial channel of water for hydraulic or placer mining; also, a chute for conveying logs or lumber down a declivity.