Which risk increases when rapid aggradation buries alluvial sediments?

💡 Explanation

Decreased carbon sequestration efficiencies increase when aggradation buries alluvium because rapid burial accelerates decomposition relative to stabilization. Reduced sediment oxygenation hinders methanotroph activity, therefore slowing carbon burial as stable carbonates, rather than preserving organics.

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• Which risk increases when saturated sediment underlies structures?
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