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Geography

Which outcome increases near coastal freshwater streams during regional saltwater intrusion events?

A)Colloid flocculation and sediment deposition
B)Anaerobic decomposition due to limited oxygen
C)Methanogenesis in adjacent submerged soils
D)Density-driven stratification and stagnation

💡 Explanation

Larger sediment deposition arises upon saltwater's interaction with freshwater; destabilizes colloids through ionic bridging due to electrolyte increase resulting in flocculation. This stream deposition rather than suspension occurs because increased electrostatic forces affect colloid behaviour; therefore, deposition is elevated rather than scour or sediment transport.

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