Which risk increases when a large coastal levee system experiences prolonged saltwater intrusion?

💡 Explanation

When levees experience prolonged saltwater intrusion, soil salinization occurs because the sodium ions displace other cations in the soil matrix, destabilizing the soil structure, weakening resistance to erosion/collapse. Therefore accelerated salinization results, rather than altered seismicity, marsh methane production, or sediment deposition, which involve unrelated processes.

• Which outcome results along coastlines when inlets migrate on barrier islands?
• Which outcome occurs when groundwater salinity inhibits deep bioturbation?
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• Which process dominates when increased glacial meltwater dilutes North Atlantic Ocean streams?