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it is called erosion
erosion.
there can be erosion's on mountains, canyons, rivers, and streams.
Rainfall can cause erosion both when the rain hits the surface of the Earth, called splash erosion, and when raindrops accumulate and flow like small streams. Rivers - Rivers can create a significant amount of erosion over time. They break up particles along the river bottom and carry them downstream.
All rivers create erosion but the Thames does not have significant problems of erosion.
Erosion
Erosion.
Erosion and, or greater volume.
A river's power to erode depends on the gradient, the volume and velocity, and the quantity of erosive burden. A river will normally move outwards on bends, deepening the farthest channel, and thus increasing the erosion on that bank.
the cause by the change of the earth
Erosion is formed by weathering which then forms caves, meandering rivers, valleys and waterfalls.
Erosion changes the surface by creating rivers, streams and valleys.