Which risk greatly increases after rapidly increasing lahar volume?

💡 Explanation

Increased lahar volume initiates valley incision and promotes channel avulsion because sediment transport capacity surpasses the channel's ability to stabilize through lateral migration and erosion. Therefore avulsion is more likely, rather than volcanic gas or ashfall impacts.

• Which consequence results when deflation concentrates desert varnish?
• Which soil horizon develops rapidly when vegetation cover expands?
• Which risk increases during rapid snowmelt in mountainous permafrost regions experiencing solifluction?
• Which outcome occurs when groundwater permeates fault gouge?
• Which outcome occurs when magma buoyancy exceeds lithospheric strength?
• Which primary mechanism leads to the isolation and eventual formation of an oxbow lake?