"drainage basin"^^ . "Wikipedia:Watershed"^^ . "The separation between neighbouring drainage basins (catchments). In hilly country, the divide lies along topographical peaks and ridges, but in flat country or on a high plateau (especially where the ground is marshy) the divide may be invisible - just a more or less notional line on the ground on either side of which falling raindrops will start a journey to different rivers, and even to different sides of a country or continent."^^ . "SWEETRealm:Watershed"^^ . "watershed"^^ . "FTT:645"^^ . . "ENVO"^^ . "Geonames:T.DVD"^^ . "water divide"^^ . . "FTT:220"^^ . "RIDGE LINE"^^ . "divide"^^ . "ENVO:00000292"^^ . "divide"^^ . "TGN:21440"^^ .