Which property significantly reduces lahar flow velocity in volcanic valleys?

💡 Explanation

Sediment deposition increases flow path length, lowering average fluid velocity via increased frictional resistance, which is an instance of momentum dissipation because lahar momentum is dispersed by solid bedload transport, therefore, the flow decelerates, rather than maintains speed with reduced friction or different temperatures.

• Which consequence typically results as a river maximizes sinuosity?
• Which thermal consequence occurs when reduced wind stress weakens subtropical ocean gyre circulation?
• Which mechanism causes downslope movement of waterlogged soil in arctic tundra regions?
• Which outcome occurs when increased pore fluid pressure in a fault zone exceeds lithostatic stress?
• Which outcome occurs when an increased rate destabilizes thermoclines?
• Which outcome occurs faster in warm, humid pedogenesis?