Which outcome arises when a lake blocks volcanic lahar flow?

💡 Explanation

Upstream aggradation occurs because deposition exceeds erosion where the lake acts as a barrier reducing the lahar's velocity and sediment-carrying capacity, therefore sediment accumulates upstream rather than flowing onward, altering stream morphology.

• Which outcome accelerates karst landscape development due to rainfall?
• Which risk increases when fluid injection occurs near a dormant seismic fault zone?
• Which geomorphic outcome occurs because continuous permafrost sharply degrades?
• Which feature results from increased carbonic acid levels inside karst caves?
• Which process reduces a lake's water level during stratification overturn?
• Which outcome occurs when unprotected prairie soil experiences intense 'Chinook' winds?