Yes they are. Water can erode the river banks - and carry the loose soil to other places - where it's deposited.
This land deposit you speak of is called a delta.
Type of land surface, speed and volume of water.
Silt
Probably, as many rivers that erode at the land have opened gold deposites, and the Mississippi is quite a large river.
If the slope of a river decreases, its ability to erode land will also decrease. A lower slope means the water flows more slowly, reducing the energy and force it can exert on the land. As a result, sediment transport and erosion potential will be reduced.
Yes, waves can erode the land through abrasion, where particles carried by the waves wear down rocks and other surfaces. Additionally, waves can deposit sediment they have carried, contributing to the formation of beaches and coastal landforms.
Alluviain fans
Two forms of water that can erode the earth are rainwater and rivers. Rainwater can cause erosion through sheet erosion, where thin layers of soil are removed, while rivers can erode land through the force of flowing water, carrying sediment downstream and shaping the landscape over time.
alluvial fans, deltas, groundwater erosion, deposition, soil on flood plains
The rivers carry silt and sediment, which they get from the mountains due to soil erosion. (the rivers flow extremely fast due to a steep slope) Due to less gradient of slope in the N.Plains, the rivers flow more sluggishly and are not able to carry the silt anymore. So, they deposit these minerals on their banks (forming flood plains if they flood) causing the land to become fertile.
River water flows downhill due to gravity, and riverbanks keep the river contained (most of the time). Some rivers meander, too, due to the way rivers erode the land. The older a river is, the more it meanders.
Currents can erode or deposit sediment, shaping the land. They can also affect coastal ecosystems by influencing nutrient distribution and temperature. Strong currents can cause coastal erosion, while weaker currents may deposit sediment, leading to land formation.