Siltation

noun (uncountable)

/sɪlˈteɪ.ʃən/

The process by which fine sediment (silt) is deposited and accumulates in water bodies such as rivers, reservoirs, and dams, reducing their water-carrying or storage capacity and increasing flood risk.

✍️ Usage in a UPSC answer

Decades of unregulated catchment deforestation have accelerated the siltation of major reservoirs, sharply curtailing their live storage capacity and undermining the irrigation and hydropower dividends on which the region's food and energy security depend.

Synonyms

sedimentationsilting-updepositionaggradationaccumulationinfilling

Antonyms

dredgingdesiltingscouringerosion

🌱 Word Family

silt (n/v), silted (adj), silting (v pres.p), silty (adj), desiltation (n)

🔡 Root

Middle English cylte = gravel (possibly Scandinavian, related to salt deposits); silt + -ation (Latin suffix = action/process); first attested 1930s

📜 Etymology

From English silt (Middle English cylte, "gravel," possibly from a Scandinavian source related to salt deposits) + -ation (Latin suffix denoting action or process); first attested in the 1930s.

🧠 Memory Hook

"Silt" + "-ation" = the action of silt settling. Picture a SILT-laden river quietly STATIONing (parking) its mud at the bottom until the channel chokes.

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