Today’s Erosion and Sediment Control Tip: #7

Turf Reinforcement Mats (TRMs) are used to reinforce the roots of vegetation to protect the soil for higher water velocities and tractive stresses.

 

One way to almost get “instant” armoring is to use a TRM with block sod on top.  Using three-dimensional TRM can create a void between the block sod and the soil. A key component of this application is to ensure that soil “in-fill” is used to fill the voids in the 3-diminsional TRM. 

So here’s the process:

  • Prepare the waterway (channel) to grade and dimension.
  • Incorporate soil amendments if required (lime and fertilizer).
  • Install TRM per job or manufacturer’s specifications.
  • Add soil “in-fill” with just enough to cover the TRM.
  • Lay Block Sod
  • Secure the block sod.  One way is to place netting over the sod to help hold it in place.
  • Irrigate as needed until sod has formed new roots.


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