A Grassed Waterway Would Control This Erosion. If properly sized and constructed, grassed waterways will safely transport water down slopes. Waterways may also be used to provide outlet channels for terrace systems, contour cropping operations and diversion channels. Grassed waterways are a good solution to the potential problem of rill and gully erosion when the contributing watershed acreage is relatively large. The waterway will carry large flows making it suited to large watersheds.
Farm machinery can cross it.
After establishment of vegetation, maintenance is low. However, a grassed waterway also has disadvantages. Working around the waterway with farm equipment is difficult. The waterway lacks the depth necessary to serve as a tile drainage outlet. The establishment of vegetation may be difficult.