No not every river IS a catchement. Although, yes every river does have a catchment area. The catchment area is the surrounding land within a watershed in which a single river system drains.
The Darling River has the longest river catchment, as it is fed by numerous large rivers in its headwaters. However, it is not the longest river. The longest actual river is the Murray River.
The Burdekin River's catchment area is centred around the Seaview and Gorge Ranges in north Queensland.
The SEVERN RIVER catchment is from the west of Newtown in Mid Wales. Firstly is the river Afon Clywedog which is fed from the dam Llyn Clywedog. A large catchment area 360 degrees around Newtown. Then the Severn moves North and collects from catchment areas across Northeast wales above Welshpool, from where its catchment area is added to by tributaries in the West Midlands.Floodwarn.co.uk have flood information on the river Severn.
The catchment area of the river is the area from which rainfall flows into a river and its side branches.
This is the 'river catchment'.
The catchment or drainae basin is all the land from the mountain to to seashore, drained by a single river and its tributaries is called catchment area or drainage basin
This is the land, near a river, the excess water of which, drains into the given river
14,000 hectares
it is the land area of water which has around water
This is its catchment - surrounded by its watersheds.
2104 square hecteres
Brisbane is located in more than one catchment, and within Brisbane are several catchment areas. Most of the Brisbane River is in the Brisbane Valley catchment. Refer to the related link below for more detail of the various catchments.