alluvion

• Substantif désignant l'action des eaux qui se retirent ou déposent des sédiments, formant progressivement de nouvelles terres, ainsi que les alluvions elles-mêmes (dépôts de sables, graviers, limons) charriés et déposés par un cours d'eau.

A noun referring to the gradual formation of new land through the recession of water or sediment deposit, the overflow of water onto dry land, or the sediment itself carried and deposited by flowing water.

indénombrable

1. Gradual land formationC2formal

   The slow creation of new land through the retreat of the sea or the accumulation of sediment.

   Alluvion (formation progressive de terre)

   • The alluvion along the river delta has expanded the coastline over centuries.
   • Farmers benefit from the rich soil left by alluvion after seasonal floods.
   • Geologists study alluvion to understand how continents change shape.

   Synonymesaccretionalluviation

2. Flooding or overflowC2formal

   The rise of a body of water that spills over onto land that is usually dry.

   Inondation ou débordement

   • The alluvion caused by the heavy rains submerged the entire valley.
   • Ancient records describe a catastrophic alluvion that destroyed the village.
   • Engineers built levees to protect the town from future alluvion.

   Synonymesdelugefloodinundationoverflowspatetorrent

   Antonymesariditydroughtdryness

3. Sediment depositC2formal

   Clay, silt, or gravel carried by fast-moving streams and left behind when the water slows down.

   Alluvion (dépôt sédimentaire)

   • The river's alluvion created fertile plains ideal for agriculture.
   • Miners sifted through the alluvion looking for gold nuggets.
   • The construction crew removed layers of alluvion to reach solid bedrock.

   Synonymesalluviumdepositsedimentsiltwash