One of those may be a "fall line". A point in the river where rocks, rapids, or waterfalls prevent movement by river. Richmond VA is located at the Fall Line of the James River. Sea going ships can navigate up the river to Richmond, but no further.
Barrier of death
A Dam
The Atlantic Ocean.
The tidal part of the river is controlled by the Thames Barrier. The rest of the river is controlled by a series of locks and weirs.
Boats, Rafts, Canoes and such that people use for river transportation
A transportation barrier is a natural barrier like mountains, rivers, oceans, etc that blocks or slows the way of transportation.
Yes
a transportation barrier is a geographic feature that prevents or slows transportation.
parana river
transportation, trade, warfare, barrier and most importantly agriculture that is farming
Mississippi river
In its 4,000 mile plus length it form a barrier numerous times and ways - by its depth, by its width, by its flow etc.
Andes mountains this answer was answered by KEITH WILSON
The Alps
The Mississippi river forms the western border of the southern colonies.
The Mississippi river forms the western border of the southern colonies.
The natural barrier that protected Egypt in the south is cataracts.