Which outcome occurs when artificial levees constrict a major river's channel?

💡 Explanation

Constricting a river creates backwater effects during high discharge, thereby increasing the Flood wave propagation speed upstream because of reduced channel storage and increased flow velocity; therefore, the upstream region is much more susceptible to flooding, rather than mitigated effects downstream.

• Which outcome results due to seasonal freeze-thaw in tundra?
• Which coastal outcome is accelerated when seawall toe scour occurs?
• Which mechanical effect primarily results when earthworm populations accelerate bioturbation inside loess deposits?
• Which outcome occurs when floodplains lack riparian vegetation?
• Which process accelerates when permafrost underlying a cirque thaws due to rising air temperatures?
• Which mechanism primarily maintains permafrost within a cirque's north-facing alcove at high latitudes?