Which risk increases as alluvial river base level falls?

💡 Explanation

Increased river terrace formation occurs because a falling base level causes increased downcutting via channel incision; therefore, the river erodes downward, creating terraces, rather than laterally meandering after avulsion or saturating floodplains.

• Which global effect primarily results when the Hadley cell circulation weakens in the tropics?
• Which atmospheric outcome occurs following extensive tephra deposition?
• Why does restricted Arctic outflow interrupt thermohaline circulation?
• Which mechanism is responsible for surface rupture along a transform fault boundary?
• Which mechanism causes the deflection of fast-moving air streams by the Coriolis effect?
• Which geomorphic outcome occurs because continuous permafrost sharply degrades?