I'm guessing that the White Nile is called the big long river because it is the longest out of the other one, the Blue Nile. However, the Blue Nile provides roughly 2/3 of the Nile's water supply.
The Pioneer River is 1500 km long.
295 miles long
the river nile it is 6695 km long
River Nile
Yes, the Big River in eastern Victoria Australia is approximately 32 miles (52 km) long.
The river Thames is 215 miles long.
A tributary
It is 10,184 miles long.
About 4000 miles long.
There is no river called Bulgaria here
The Missouri River is 2,341 miles long and is the longest tributary to the Mississippi River.
Rio Grande