adolescent stream aqueduct arroyo beck bed bourn braided stream branch brook brooklet burn canal channel conduit course creek creek bed crick culvert donga dry bed duct flowing stream flume fluviation fresh freshet gill gulch gully gullyhole headrace irrigation ditch kill lazy stream meandering stream midchannel midstream millstream moving road navigable river nullah race racing stream river river bed riverway rivulet run rundle runlet runnel sike sluice spill stream spillbox spillway stream stream action stream bed streamlet streamway subterranean river swash swash channel tailrace wadi water carrier water channel water furrow water gap water gate waterway waterworks