Coir Geotextile for Erosion Control
topic
Coir geotextiles are woven or nonwoven mats produced from brown coir yarn (Ply 2–4, twist 80–120 TPI, linear density 200–1,200 g/m²) for slope stabilisation, river bank protection, and land reclamation. Open weave coir netting (aperture 10–20 mm) anchored with biodegradable coir pegs (150–300 mm) reduces surface runoff velocity by 60–80% and soil loss by 85–95% on 20–40° slopes (ASTM D5411). Coir geotextile tensile strength of 20–80 kN/m (ISO 10319) provides structural reinforcement during vegetation establishment over 2–5 years. Biodegradation in 3–5 years releases 15–20 kg carbon/m² as organic matter improving soil structure. Installed cost of $2–8/m² is 30–50% lower than synthetic polypropylene geotextile for equivalent temporary erosion control periods. ASTM D6818 and ISO 10318 govern geotextile product certification.
Role
Primary biodegradable geotextile material for temporary erosion control on highway embankments, mine reclamation sites, and coastal restoration projects, providing structural reinforcement during critical vegetation establishment while gradually enriching soil carbon as it biodegrades.