Which process causes increased deposition of alluvial sediment at a river delta when average sea level rises steadily?

💡 Explanation

When sea level rises, base level of the river also rises; the lower delta gradient decreases the river's flow velocity thereby reducing the sediment transport capacity, causing increased sediment deposition to re-establish equilibrium . Therefore, decreased sediment transport occurs, rather than increased stream velocity, fluvial erosion, or changing bank vegetation.

• Which secondary effect is likely when liquefaction occurs due to earthquake shaking in regions with levees?
• Following a glacial retreat, which mechanism leads to the formation of a proglacial lake dammed by a moraine?
• Which outcome occurs when rapid snowmelt increases river discharge past the original design height of levees?
• Which risk increases when seismic waves weaken a large landslide-prone slope immediately after a major earthquake?
• Which mechanism initiates density-driven thermohaline circulation in the North Atlantic Ocean?
• Which mechanism causes secondary volcanic cones to form on the flanks of stratovolcanoes?