Which outcome results downstream when extensive levee construction constricts a river?

💡 Explanation

Increased channel bed sediment erosion occurs downstream because the confinement increases streamflow velocity and shear stress; this is channel incision. Therefore, erosion increases rather than decreasing infiltration, because the river's energy becomes focused vertically.

• Which outcome occurs when airborne tephra accumulates beyond capacity?
• Which mechanism causes long-term cyclic uplift and subsidence along a strike-slip fault zone?
• Which effect dominates near the Earth's equator causing air masses to move primarily vertically?
• Which process most directly causes terrace formation in a river valley after alluvial deposition?
• Which mechanism amplifies stream incision when tectonic uplift occurs in a humid region?
• Which geographical change accelerates when fjord sill depth decreases?