Which risk intensifies as alluvial river plains subside?

💡 Explanation

Increased flooding risk elevates levee failure because isostatic subsidence lowers the floodplain, diminishing the levee's relative height; therefore overtopping from river's capacity leads to catastrophic breach damage, rather than the other three, because they are unrelated to subsidence and flood forces.

• Which mechanism causes cyclical changes in surface sea temperature across the equatorial Pacific Ocean?
• Which risk significantly increases when coastal upwelling stalls?
• Which geological hazard intensifies when stresses abruptly release along a transform fault segment containing an existing bend?
• Which mechanism creates crevasse splays when floodwater overtops a natural levee along a river?
• Which mechanism causes braided river channel formation within an alluvial plain environment?
• Which outcome occurs when North Atlantic Deep Water formation weakens substantially?