Which process dominates surface topography development within a braided stream's alluvial zone during flood events?

💡 Explanation

During floods, flow velocity decreases at the margins, causing differential sediment deposition on natural levees because coarser materials deposit first, building up levee structures and defining channel boundaries. Therefore deposition dominates, rather than cryogenic or chemical weathering which are slower, or aeolian transport which is less significant during floods.

• Which geological outcome occurs when oceanic plate subduction introduces water into the mantle wedge?
• Which process triggers widespread lacustrine landslides when glacial meltwater rapidly fills a proglacial lake?
• Which outcome occurs when increased glacial meltwater disrupts North Atlantic gyre circulation salinity gradient?
• Which risk increases when earthquake-induced liquefaction occurs beneath a coastal levee?
• Which consequence results when excessive subsurface water flows inhibit bioturbation?
• Which adverse outcome follows the loss of vegetation cover stability on thick loess deposits?