Explain how lowering the speed of the current that is transporting sediment could result in the deposition of that sediment.

In the peak stage of a flood where it current is very high, there is much deposition of sediment dumped into the stream by mainly overland flow and gully erosion. This leads to huge sediment deposition on the stream bed.

As the flood 's current reduces, competence and capacity reduces and sediments are deposited.