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Chapter 8.3

Seed across the waterway (Figure 8.3.2). In the same •

way that farming the contour of a slope reduces erosion, seeding perpendicular to the direction of the water flow helps increase friction and further slow the flow of water in the waterway.

more info

For more information on the design, installation and maintenance of grassed waterways can be found in the following online resources:

AAFC – PFRA. 1989. •

Manitoba Soil Conservation Resource Manual - Water Erosion. www.agr.gc.ca/ pfra/soil/soilc02a.htm

Ontario Ministry of •

Agriculture, Food and Rural Affairs. 1994. Grassed Waterways. Agdex 751. www. omafra.gov.on.ca/english/ engineer/facts/94-039.htm

AF. 2002. Grassed Waterway •

Construction. Agdex 573-6.

Figure 8.3.2 Recommended Seeding Pattern for Grassed Waterways

When establishing the waterway, use forage mixes •

that establish quickly and contain sod-forming, long lived grass species. To be effective, the waterway must have well-established vegetation capable of withstanding the force exerted by the flow of water through the waterway and prolonged submersion under water. Use a hardy cover crop such as fall rye to protect the waterway until grass becomes established. Since fertility can be an issue in newly constructed waterways, apply inorganic fertilizer to help the plants gain a foothold.