Definitions for "Grassed waterway"
A natural or constructed waterway, typically broad and shallow, seeded to grass as protection against erosion. Conducts surface water away from cropland.
an area where grass is left to grow permanently to drain runoff into designated outlets, without exposing bare soil to erosion
a wide, shallow grassed channel that can carry a large volume of water quickly down a steep slope
a strip of plants or material planted where water flows to filter out unwanted particles Minnesota: Modern Farming