siltation
noun [ U ] environment specialized uk/sɪlˈteɪ.ʃən/ us/sɪlˈteɪ.ʃən/
（泥沙）淤塞;泥沙，淤泥
the process of blocking something with sand or soil; the sand or soil that blocks something
Construction on the land would cause siltation, pollution, and other degradation of the river. 在这片土地上建造工程会导致河流淤积、污染和其他形式的退化。
Salts, chemicals, and siltation could pollute the stream. 盐类、化学物质和淤泥都可能污染河流。