silt

sand, mud, etc. that is carried by flowing water and is left at the mouth of a river or in a harbour ตะกอน, โคลน, ขี้เลน

The tsunami waves spread heavy oils and silt over rice paddies.

The water flow is to be improved by dredging silt, building riverbanks and digging adjoining canals.

Heavy rainfall was collected in a series of canals and tributaries, which channelled the rain water to rivers while depositing silt along the riverbanks