It all depends on the river most of them take water towards the sea, some towards lakes and some just end up running out of water before they reach any particular destination, A lot of water is lost into the ground and if the rivers run through population centers or agricultural areas the waters may be dammed and redistributed for irrigation or urban water supply.
All rivers carry rainwater to the sea, so any river in Europe!
The water course is driven by the force of gravity. Steep in the headwaters, and flatter in the plainlands.
runoff
Most rivers, streams and creeks carry rainwater to the sea.There are exceptions: one of Australia's major waterways, the Cooper Creek system, carries water to the salt lake (not an inland sea) known as Lake Eyre in far northern South Australia. This water does not find its way to the sea.
Yes, rivers have slopes. All rivers have land around them that is at a higher elevation that the river itself. When it rains, the rainwater flows down the slope and into the river.
biosphere and hydrosphere
runoff
It is called a gutter.
Whitewater rivers carry higher amounts of sediments than blackwater rivers. Blackwater rivers carry higher amounts or organics than whitewater rivers.
Rainwater that does not soak into the ground is called surface runoff. It flows over the surface of the ground and can collect in streams, rivers, and eventually make its way to lakes or oceans.
The sea is made up of a combination of sources, including rainwater, rivers, and runoff from the land. Rainwater contributes to filling up the sea, but it is not the sole source of water in the oceans.
Most rianwater goes in to rivers or lakes that soon go back into the ocean were it may have ben from