What are Effective Erosion Control Solutions, Erosion is moving of soil from one place to another by wind or water activities. In this way material can be transferred few millimetres or thousands of kilometres away. To prevent this unpredictable and undesirable movement, erosion control solutions are necessary.

Due to erosion activities every year around 6 million hectares of fertile regions become deserts. This soil can end up in water bodies contaminating them. If wind erosion occurs, the soil particles end up in homes and working places in form of dust. Erosion can cause filling of drainage channels with eroded soil which results in floods during rainy seasons. Therefore, erosion control solutions are needed to prevent negative influences on agriculture, environment, everyday life, etc.

The only permanent erosion control measure is planting or afforestation. Assuming that final goal of all erosion control solutions is permanent control, temporary methods are to enable planting. Why is there need for transitional (temporary) measures? If seeds or seedlings would be placed on untreated terrain exposed to erosion, they would be carried away together with soil.

There are various methods of temporary erosion control solutions. More common are physical methods, such as mulching and installation of barriers. Less common are chemical, which change structure of soil. These methods can also be classified into those that support planting, and those that make planting difficult or impossible.

Mulching can be done by covering soil with various natural or synthetic materials. Mulch can be made of loose or continual material. Loose mulch is usually in form of stones with size ranging from 1 to 5cm. This method is not good for sloping terrains, as stones can be borne by erosion themselves. It also doesn’t support planting. Continual mulching can be made of mesh or solid material. Solid material protects soil better from wind and water movements, but doesn’t provide conditions for plants growing. Meshy materials are less protective, but enable planting. In both cases inspections must be frequent to check if mulch repairments are needed.

Protective fences are also considered as erosion control solutions. The same as mulch, they can be made of natural or synthetic material, and structure can be meshy or solid. The fences are more effective against wind than water erosion. Anyway, these barriers are not supportive for planting as soil keeps moving significantly and fences are eventually buried by soil.

Global Road Technology created product which provides all desired properties of temporary erosion control solutions; it is effective against wind and precipitation water activities and provides optimal conditions for planting. This surface stabilizer product trademarked GRT Enviro Binder keeps soil in place and provides optimal soil porosity which is very beneficial for plants growing.

Landloch Pty Ltd undertook testing of the effectiveness of GRT Enviro Binder in marginal material (Black Soil). Rainfall was applied at energies and intensities consistent with storms in subtropical climates such as Queensland, which occur in 2, 10 and 50 years. Treated soil was exposed to simulate rainfall of intensities:

  • low – 80-85 mm/h
  • medium – 100-105 mm/h
  • high – 140-160 mm/h

Under rainfall no runoff samples contained significant quantities of soil (sediment) either as dispersed particles or as small aggregates or sand grains at any of the intensities and gradients tested (10, 20 and 30%). Sediment concentrations in g/l were close to zero.

The difference in infiltration rates between the control and treated plots was 30 mm/h in average. The quite large increase in average infiltration rates due to application of the GRT Enviro Binder is evidence that the product has stabilized the surface aggregates and structure. This has reduced or eliminated the surface aggregate breakdown and compaction by raindrops.

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