Erosion Control

Erosion Control

One of the primary causes of progressive erosion problems on a global scale is climate change. 

The hydraulic and filtration properties of TERRAM® geosynthetics allow them to be used as a highly effective erosion control system in place of traditional filter layers. Typically, a single layer of geotextile fabric can replace a succession of stone filter layers.

Geotextiles

In coastal areas, rivers, lakes, reservoirs, drainage ditches, flood bunds and overspill ponds, natural vegetation can provide a certain level of erosion protection. However, it is often inadequate on steep slopes or areas prone to wave run-up or intermittent high velocity flows such as river and canal banks, which are subject to wave action creating reverse flow conditions.

It is this dynamic erosive force that undermines bank stability and affects channel flow and navigability.

The hydraulic and filtration properties of TERRAM Geotextiles allow them to be highly effective when used in place of the more traditional succession of stone filter layers. 

In this application, a single bedding layer of stone is laid on the geotextile layer prior to the rock armour, that resists erosion caused by variable hydraulic forces.

Typical applications include:
• Coastal Protection
• Dams and Flood Defence Bunds
• River and Canal Bank Protection
• River Revetments
• Culvert Head Walls
• Structured Causeways
• Cliff Protection
• Bridge abutments
• Submerged breakwaters
• Artificial Islands

Design Considerations
• Soil conditions
• Hydrology
• Hydrogeology


Geocells


TERRAM Geocells can often eliminate complicated and expensive construction techniques normally associated with many erosion control applications. 


The three dimensional geocellular structure provides a blanket of 'cells' on the slope surface which can contain a variety of infill materials depending on the application; either topsoil, aggregates, from sands and gravels to larger stones and cobbles, and concrete of various strengths and surface finishes. 

The infill greatly improves resistance to erosive forces such as rainwater run-off on steep or unstable slopes, or slopes exposed to severe hydraulic or mechanical stresses.

Typical applications include:
• Cut or fill embankments
• Dams or spillways
• Abutment protection
• Landfill lining, covers and drainage
• Steep slopes
• Soil nailing cover.

Design Considerations
• Slope angle
• Slope drainage
• Slope length
• Slope substrate
• Hydrology
• Required finish on slope

Grass Mesh / Engineered turf

Market Sectors

Grass and Ground


TERRAM reinforcing grass surface solutions help prevent erosion. By reinforcing the rootzone, TERRAM products can limit erosion from wind and water by creating a strong root system for grassed surfaces.  

Advanced Turf System is an invisible surface reinforcement. Through the use of plastic net elements blended in a rootzone, a very strong yet free draining reinforced grassed surface is created.

Applications include:
• Slopes
• Landscaped areas


Downloads

TERRAM geocomposites
TERRAM geocells
GEOCELL & T1000 Erosion control for canal slope (Monmouth and Brecon Canal)
GEOCELL Bund System (Busk Meadows, Sheffield, UK)
GEOCELL Lagoon Slope vegetation control (Murco Oil Refinery, Milford Haven)