Which risk greatly increases after pyroclastic flows deposit material onto a watershed?

💡 Explanation

Pyroclastic material deposited increases flood risk because the process of sediment bulking causes a rapid increase in the volume of runoff during rain events; therefore flooding increases, rather than slower glacial changes or sinkhole erosion.

• Which risk increases for communities protected by artificial levees during intense, prolonged rainfall events?
• Which mechanism causes coastal upwelling along western continental streams under specific wind conditions?
• Which process causes nutrient upwelling on the eastern edge of ocean gyres contributing to high marine productivity?
• Which atmospheric effect significantly increases monsoon intensity over the Indian subcontinent due to coastal topography?
• Which consequence results when a pyroclastic surge encountering deep snow?
• Which displacement occurs in long-range artillery trajectory due to Earth's motion?