Yes, there are rivers. For example, Daugava, Mārupīte.
There are more than one river in Greece, so that is very complicated to answer.
No, there is only one nile river, and it's in Africa.
Tributary when one river flows into another or if more than one river merges to form another - Confluence
There is more than one Tributary to the Mississippi River the Illinois River is one example, it is 273 mile long.
There is only one airport in Latvia. Riga International Airport
There is more than one river near New Orleans, but the largest one is the Mississippi River, which flows to the Gulf of Mexico.
There are a vast number of reasons why one river could have more sediment than another. The type of watershed. Urbanization stream channeling Dams Heavy rains That is a short list of things that can impact the sediment load of a river.
Australia does have more than one permanent inland river, but its largest permanent inland river is the Murray River.
I am a writer of currency articles with companies for more than seven years
mississippi river
Huang River???? I think
Mississippi river