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.

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