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Geography

Which outcome occurs when a glacial lake outburst flood (GLOF) erodes a moraine dam?

A)Isostatic rebound acceleration in the basin
B)Formation of braided stream networks downstream
C)Increased methane release from thermokarst
D)Enhanced sediment deposition rates in deltas

💡 Explanation

When a GLOF erodes a moraine dam, extreme discharge occurs because incision and sediment transport increases, leading to a wider, shallower channel morphology. Therefore braided stream networks form downstream, rather than isostatic rebound acceleration, increased methane release, or enhanced delta deposition rates, which require different triggers.

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