In general, erosion is the removal of soil by wind and water. The impact of the raindrop causes particles of soil to be detached and splash into the air. After the soil particles become dislodged, they can be carried by surface runoff. Surface runoff begins when the soil is saturated and cannot absorb the falling rain. Erosion and sedimentation are natural processes accelerated by human activities.

Scouring of the exposed soil by runoff can cause more erosion. As the runoff increases, it tends to
be concentrated into rivulets and then into grass channels. As the speed of runoff increases, more
soil particles are transported.

The removal of sediment occurs when the surface flow lessens and the soil particles start to drop.
The heavier particles such as gravel and sand settle first, and then the lighter particles settle. Little
by little, silt and clay can be transported by rain and finally be carried downstream from its
upland point of origin.

Rainfall on unprotected soil causes serious erosion and results in sediment being deposited in
waterways and a general degradation of the environment. Public criticism can be very strong
when streams are dirty, drainage areas clogged, water supplies threatened, and unsightly deposits
of silt occur on the landscape.

Removal of soil by water at construction sites that are not protected can result in rills, gullies,
sheet erosion, damaged slopes, eroded ditches, plugged drainage structures and culverts, and
flooded work areas. Stream channels can be filled with sediment to the point where the flow
elevation is raised enough to flood areas adjacent to the stream.

Sediment always damages the areas where it is deposited. For example, sediment buries crops and
lawns, kills trees, and fills ditches and other drainage systems. Sediment reduces the storage
capacity of reservoirs and fills small ponds and lakes. It also damages aquatic life. Sediment can
render an area inadequate for its intended use. Sediment that reaches navigable waterways requires the navigation channels to be cleared on a continuous basis.

Why Spraygrass?

Spraygrass applications and techniques are appropriate for:
• Road-side batters
• Dam sites
• Bridge approaches and abutments
• Factory and shopping complex sites
• Powerline construction
• Mining sites
• Land subdivisions
Spraygrass has been operational for over 40 years, demonstrating quality workmanship and commitment to our customers.
Spraygrass is dedicated to providing excellence in workmanship using the highest quality products available to create complete customer satisfaction. This is achieved through teamwork, which ensures all staff are part of the Company and motivated in the same direction of continuous improvement to achieve success in all they do, from the Managing Director to field staff