There are many river in Wales and it might be a matter of opinion which were the 'main' ones. However two rivers which begin in Wales and flow into England are, or were, of major importance. These are the River Severn in Mid/South Wales and the River Dee in North Wales. For more information about Welsh rivers see the related link below.
The longest river enterly in Wales is the River Towy / Afon Tywi.
The main river of Wales is the river Seven it flows along the English Welsh boarder, it is the longest river in the UK.
River Severn / Afon Hafren
River Wye / Afon Gwy
River Towy / Afon Tywi
River Usk / Afon Wysg
River Teifi / Afon Teifi
Probably the River Taff, which is why many Welsh people through the ages have been nicknamed 'Taffy.'
At 76 miles, the River Teifi is the longest river wholly in Wales.
The River Towy
severn
yes
There are several major inland rivers in New South Wales. They include:Murray RiverDarling RiverMurrumbidgee RiverLachlan RiverMacquarie RiverCastlereagh River
The two main rivers for Mesopotamia are the Euphrates and the Tigris.
7
4
Ebro, Tajo, Guadalquivir, Guadiana, and the Duero are Spain's main rivers.
They flow into 'The Tigris' and 'Ufratis' rivers!
Dee, Wye, Severn.
The Tigris and Euphrates.
The 2 main rivers are the Tigris and the Euphrates
The confluence of the Murray and Darling Rivers is at Wentworth, New South Wales
Part of the border of Queensland and New South Wales is formed by the Macintyre and Dumaresq Rivers, Rivers do not flow in a straight line.
marylands main rivers are cheapeaka bay