Coir Logs (KoirLogs)
Coir logs are natural coconut fiber logs with applications in wetland mitigation, shoreline stabilization and stream bank/channel protection. Each log is made from double cleaned, unsorted coconut fiber encased in high tensile strength coir twine netting. Coir logs help to dissipate the impact from wave action and flowing water, trap sediments and encourage vegetation growth. During installation, native seedlings or plant cuttings can be planted into the Coir log. Sediment trapped by the Coir logs as well as the inherent property of the coir fiber to absorb and retain moisture provides an ideal medium for vegetation establishment and growth.
Coir logs are available in 12", 16" and 20" diameters. The logs are typically 10 or 20 feet long.
Environmental designers evaluate site conditions prior to installation to determine the appropriate size, density and number Coir logs required. Site parameters evaluated often include flow velocity, wave height, stream energy, soil type and accessibility to the project site.
Normal Density (ND Series): seven pounds per cubic foot. Offers faster root development, ease of handling and installation.
High Density (HD Series): nine pounds per cubic foot. Offers increased protection in high energy sites.
Coir logs generally last for two to five years. As it bio-degrades, the plants develop a well-established root system in the shoreline sediment which will retain the soil in place preventing further erosion. The decomposing Coir log provides valuable humus to the soil.
Erosion Control Netting & Blankets
Erosion control netting and blankets are used to provide temporary but quick coverage for exposed areas. Most of the erosion control netting ABI carries is made of jute or other biodegradable material and is used to anchor seeds and mulch, such as straw or wood chips, that might otherwise be washed or blown away. Together, the netting and mulch reduce erosion and can protect seeds until they can germinate. Pre-fabricated erosion control blankets can be rolled onto the surface and staked in place. They provide protection from rainfall and runoff and have perforations to allow water to seep into the soil.
Gabions are wire-mesh structures most often filled with rock and soil. Gabion baskets should be lined with coconut fiber to hold soil in place and allow plants to grow. Vegetation is planted between the rocks once the plants become mature, this type of shoreline protection should provide more habitat than traditional rip-rap.