Natural levees are typically formed in which type of geographical setting?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. Along the floodplains of large rivers.
Natural levees usually form along the floodplains of large rivers, where repeated flooding deposits heavier sediments like sand and silt close to the riverbanks. Over time, these layers build up into raised embankments called natural levees. They act like gentle walls that reduce minor flooding but can be overtopped during major floods. Famous examples include the levees along the Mississippi and Brahmaputra rivers.
Why other options are incorrect:
-
Base of mountain glaciers: These areas form moraines, not levees.
-
Desert sand dune regions: Wind, not rivers, shapes dunes, so levees don’t develop.
-
Coastal marine deltas: Though sediment-rich, deltas form distributaries and mudflats, not classic natural levees formed by overbank river flooding.