none
Yes, there has to be there is no country in the world without any living animal
Any navigable river will have locks, regardless of which country it is in.
Politically the country on whose territory any part of the river is on would 'control' that part of the river.
Tributaries of the Dead Sea(Which is located in Asia)
River Bollin
The largest city in the world that is not on a lake, navigable river, or coast is Delhi, the capital city of India. Delhi is situated in the northern part of the country far from any major water body.
Any country upstream from the rivers mouth.
If you want an example: Great Britain/Egypt/Canada Or pretty much ANY COUNTRY
Amazon River in South America.
Without it you (any mammal) dies.
Some of the major rivers in the country of Spain are Ebro River, Tajor River, and the Duero River. The Guadalquivir River is another major river in Spain.
Use a numbing ointmentand remember over the river not down the river