Which primary risk increases when an artificial levee system is constructed on a highly sinuous river?

💡 Explanation

When a river is channelized by artificial levees, the flow velocity increases due to the shorter, straighter path because floodplain storage is reduced, leading to greater hydraulic energy concentrated in the channel. Therefore, the downstream riverbed incision is accelerated, rather than biodiversity, salinity, or barrier erosion, which are triggered by different forcing mechanisms.

• Which risk increases downstream from an artificially straightened meander resulting in an oxbow lake cutoff?
• Which risk increases when roads are constructed across regions with active solifluction?
• Which outcome occurs when seasonally thawed active layer over permafrost experiences saturation on a moderate slope?
• Which phenomenon creates crescent-shaped oxbow lakes along meandering fluvial systems?
• Which process dictates sediment direction around coastal island complexes?
• Which mechanism causes formation of placer deposits near oxbow lakes during fluvial transport?