what would happen to the velocity of a river if an avalanche dumped rocky debris on its stream bed? group of answer choices

The velocity would decrease because the channel roughness had increased.Where a river meets the ocean flowing water widens and slows down depositing its sediment load in a delta. Sediment carried and deposited by the coast over time causes the delta to grow seaward, adding new land to the coast. Most flash floods are caused by slow-moving thunderstorms, thunderstorms that repeatedly move over the same area, or heavy rainfall from hurricanes and tropical storms.Debris and ice can accumulate on natural or man-made obstacles and block the flow of water. With a radial drainage system, the flow radiates outward from a central high point. Volcanoes usually have excellent radial drainage. Other geological features where radial drainage commonly develops are domes and laccoliths. The maximum sediment load that a stream can carry is called it's capacity. Capacity is directly proportional to discharge.Learn more about The velocity here:-https://brainly.com/question/25749514#SPJ4