Which long-term outcome occurs from a dam blocking sediment transport?

💡 Explanation

Increased coastal erosion occurs because sediment supply is cut off, hindering natural coastal buildup; therefore, coastal land retreats, rather than progrades, under constant erosive forces because longshore drift's sediment replenishment mechanism fails. Submarine canyon formation and upstream accretion are not dominant consequences.

• Which surface feature is accelerated meltwater flow primarily responsible for where active solifluction lobes are present?
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• Which mechanism causes reduced sediment deposition rates within an oxbow lake compared to the active river channel?
• Which landform results when water percolates through weakened limestone?
• Which mechanism explains shield volcano formation associated with mantle plumes?