Which outcome occurs when gradual 'longshore drift' along a coastline encounters a significant river estuary?

💡 Explanation

The channel shifts due to sediment accumulation via longshore drift. Sediment deposition at the estuary mouth causes shallower depths, resulting in an upstream migration of the channel, because river flow diverts away from built volume, rather than other effects, which require different drivers such as temperature changes.

• Which outcome occurs when reduced atmospheric pressure differences weaken trade winds?
• Which mechanism causes the formation of enhanced precipitation zones along subtropical jet stream paths?
• Which risk increases after prolonged aquifer depletion near a major fault line?
• Which process influences thermocline destabilization when increased freshwater runoff enters a subtropical gyre?
• Which risk increases when accelerating thaw of sub-sea permafrost releases methane hydrates?
• Which outcome occurs when shield volcanoes overly a hotspot?