Which risk is greatly increased when streamflow in an ephemeral stream bed suddenly transitions from laminar to turbulent due to heavy rainfall?

💡 Explanation

Localized bank erosion risk increases because increased streamflow exceeding the Reynolds number creates turbulence; thus, the shearing stress increases leading to greater soil particle detachment. Reduced surface-level stability results, rather than deeper aquifer recharge, because saturation happens too rapidly for infiltration.

• Which outcome occurs following the moraine dam failure surrounding an alpine lake?
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