silt

/sɪlt/

mud or clay or small rocks deposited by a river or lake

Chinese meaning: 淤泥；泥沙

The river deposited a thick layer of silt on the floodplain.

河流在洪泛区沉积了一层厚厚的淤泥。

Excessive silt in the reservoir reduces its water storage capacity.

水库中过多的淤泥降低了其蓄水能力。