Definition

1. Noun:
   • Alluvium: Sediment—such as clay, silt, sand, or gravel—that is deposited by flowing water, typically in riverbeds, floodplains, or deltas.
   • Alluvial deposit: The material itself that has been transported and left behind by rivers or streams.

Usage Examples

• Noun:
  • Đồng bằng sông Cửu Long được hình thành từ sa bồi. (The Mekong Delta was formed from alluvium.)
  • Con sông này mang theo nhiều sa bồi màu mỡ. (This river carries a lot of fertile alluvial deposit.)

Advanced Usage

• The term is primarily used in scientific, geographical, and agricultural contexts to describe land formation and soil composition.

Variants and Related Words

• Đất sa bồi (n): Alluvial soil. The fertile soil created by the deposition of alluvium.
  • Nông dân trồng lúa trên đất sa bồi. (Farmers grow rice on alluvial soil.)

Synonyms

• Alluvium: The general term for the deposited sediment.
• Silt: Fine sediment often a component of alluvium.
• Sediment: Material that settles at the bottom of a liquid.

Related Terms (Not Idioms)

• Bồi đắp (v): To silt up; to accrete. The process of deposition that creates .
  • Phù sa bồi đắp cho đồng bằng. (The silt accretes, building up the delta.)
• Phù sa (n): Silt, fertile sediment. Often used interchangeably with , though can emphasize the fine, fertile quality.
  • Phù sa màu mỡ giúp cây trồng phát triển. (The fertile silt helps crops grow.)

1. Alluvial
   • Đất sa bồi
     Alluvial soil