How does a stream typically change as it flows from its headwaters to its mouth?

Silts and clays drape floodplains away from channels. As one moves along a stream in the downstream direction: Discharge increases, as noted above, because water is added to the stream from tributary streams and groundwater. As discharge increases, the width, depth, and average velocity of the stream increase.

answer; round wood logs, building materials like (plywood),also pulp and paper products;