Changes

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 blanket|ECB]]).   

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|ECB]]).   

*Mats should be applied with soil fill technique:

*Mats should be applied with soil fill technique:

**Grade the swale and smooth the top soil, removing any debris and large rocks,

**Grade the swale and smooth the top soil, removing any debris and large rocks,

**Anchor the bottom end of the channel in a similar fashion to the top,  

**Anchor the bottom end of the channel in a similar fashion to the top,  

**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.   

**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.   

**An [[Erosion control blanket]]  may be applied to protect the surface through the first one or two years.  

**An [[Erosion control blankets|ECB]]  may be applied to protect the surface through the first one or two years.  

**Irrigate until turf grass is established.  

**Irrigate until turf grass is established.  

[[category: materials]]

[[category: materials]]