part of stream waterfall FTT:680 falls fall EcoLexicon:waterfall EcoLexicon:force cataract FTT:435 A sudden descent of water over a step or ledge in the bed of a river. FTT:439 FTT:436 linn waterfalls Geonames:H.FLLS cascade TGN:21161 force https://en.wikipedia.org/wiki/Waterfall Should this be a hydroform? TGN:21166 WATERFALL lotic water body hydroform