Which factor primarily determines the rate of floodplain aggradation in an alluvial river system?

💡 Explanation

When a river overflows its banks, suspended sediment concentration determines the volume of fine particles deposited across the floodplain during flood events, because higher concentration directly increases the material available for deposition thereby increasing aggradation. Therefore, sediment concentration is key, rather than sinuosity, vegetation, or flood recurrence which influence dispersal and stability.

• Which outcome on land results from aeolian deposition?
• When continents interrupt ocean gyres, which outcome results?
• Which long-term consequence directly follows from pervasive solifluction near tundra oil pipelines?
• Which mechanism intensifies coastal upwelling when alongshore winds align parallel to continental margins near a gyre’s eastern boundary?
• Which outcome occurs when sediment supply overwhelms lake subsidence?
• Which outcome occurs when trade winds weaken along the equator in the eastern Pacific Ocean, reducing upwelling?