Which outcome occurs when rapid aggradation chokes an alluvial channel?

💡 Explanation

Aggradation causes the alluvial riverbed to build, leading to the deposition of unstable sediment dams. This increases the likelihood of outburst floods because dam failure sends a pulse of water and sediment downstream, rather than a steady sediment supply.

• Which geological outcome results when sustained, unidirectional winds selectively erode fine sediments?
• Which environmental change is accelerated through karst cave enlargement?
• Which outcome occurs after widespread ashfall on volcanic soils?
• Which mechanism causes thermocline formation after prolonged solar radiation on a freshwater lake with low turbidity?
• Which impact results when coastal upwelling weakens due to increased ocean stratification?
• Which surface wind pattern results from the greatest Coriolis effect at 60 degrees latitude?