human
By a reference to your navigation charts, young gentlemen, you will often find banks and bars thrown up at the mouths of rivers. At the mouth of the Scheldt, several miles from the shore, there are Thornton's Ridge, The Rabs, Schouwen Bank, Steen Banks, and others of similar formation. At the mouth of the Mississippi, in our own country, you are aware that large vessels find great difficulty in getting over the bar. If we take a tumbler full of Mississippi water, after heavy rains in the north-west, and let it stand a few moments, a thick sediment settles at the bottom. This sediment forms the bar at the mouth of the river. The sand and mud are carried down by the current, and when the water has a chance to rest, it deposits its burden upon the bottom.
gpt
But why in that particular place?