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| <p>Turf reinforcement mats (TRM) may be required in swales which are designed to convey higher velocity events. Most TRM are made of synthetic fibres and intended as a permanent part of the construction (unlike a temporary [[Erosion control blankets| erosion control blanket]]).
| | Turf reinforcement mats (TRM) may be required in [[swales]] which are designed to convey higher velocity events. Most TRM are made of synthetic fibres and intended as a permanent part of the construction (unlike a temporary [[Erosion control blankets| erosion control blanket]]). |
| Mats should be applied with soil fill technique: | | Mats should be applied with soil fill technique: |
| <ol>
| | #Grade the swale and smooth the top soil, removing any debris and large rocks, |
| <li>Grade the swale and smooth the top soil, removing any debris and large rocks,</li>
| | #Seed with [[turf]] grass mixture, |
| <li>Seed with turf grass mixture,</li>
| | #Dig 150 mm anchor trench at the top of the channel, |
| <li>Dig 150 mm anchor trench at the top of the channel,</li>
| | #Secure blanket into the trench with staples every 300 mm. Backfill and compact soil into the trench, |
| <li>Secure blanket into the trench with staples every 300 mm. Backfill and compact soil into the trench,</li>
| | #Unroll mat in the direction of flow. Staple as recommended by manufacturer, |
| <li>Unroll mat in the direction of flow. Staple as recommended by manufacturer,</li>
| | #Overlaps should be 150 mm and stapled. Upstream mat should always overlay the downstream mat, |
| <li>Overlaps should be 150 mm and stapled. Upstream mat should always overlay the downstream mat, </li>
| | #Anchor the bottom end of the channel in a similar fashion to the top, |
| <li>Anchor the bottom end of the channel in a similar fashion to the top, </li>
| | #Apply 15-20 mm of [[topsoil]] over the TRM, without the use of heavy machinery which can tear the mat and/or compact the soil, |
| <li>Apply 15-20 mm of [[topsoil]] over the TRM, without the use of heavy machinery which can tear the mat and/or compact the soil, </li>
| | #An [[Erosion control blankets| erosion control blanket]] may be applied to protect the surface through the first one or two years, |
| <li>An [[Erosion control blankets| erosion control blanket]] may be applied to protect the surface through the first one or two years, </li>
| | #Irrigate until turf grass is established. |
| <li>Irrigate until turf grass is established. </li>
| |
| </ol>
| |
| [[category: materials]] | | [[category: materials]] |