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What is an erosion control blanket?

Coir glossary · Updated 2026-09-25 · Also in Português →

Rolled mat of plant fibers (coir, straw or a blend) held together by stitching and netting, laid and stapled over slopes and banks to protect bare soil from rain and runoff until vegetation establishes. The Brazilian road standard DNIT 074/2006-ES calls it a biodegradable blanket (manta biodegradável).

Erosion control blanket: definition and classes.

US drainage manuals define an erosion control blanket (ECB) as a temporary degradable rolled erosion control product (RECP) made of processed natural or polymer fibers mechanically, structurally or chemically bound together to form a continuous matrix (MHFD EC-6). The classification used in US specifications groups temporary RECPs by functional longevity: about 3 months (Type 1), 12 months (Type 2), 24 months (Type 3) and 36 months (Type 4). Types 3 and 4 call for slow-degrading natural or polymer fibers or yarns. Coir is listed among the fibers used, alongside straw, jute, wood excelsior and polymers (SUDAS 7E-5). Performance on a slope under rainfall is tested to ASTM D6459.

In Brazil, DNIT 074/2006-ES (item 3.7) defines biodegradable blankets as industrial products of dried plant fibers, grass or coconut, interlaced by industrial stitching or biological adhesives. Open-weave versions are classed as biodegradable nets (item 3.9). DNIT 102/2009-ES lists both among the special devices for erosion control on road slopes.

Erosion control blanket: equivalents.

PT: biomanta, manta biodegradável · ES: manta de control de erosión, biomanta

Sources: MHFD EC-6 · SUDAS 7E-5 · DNIT 074/2006-ES. Definition from the Carve coir glossary, where the full source list is given.

Related terms.

Coir log: Flexible cylinder of coconut fiber packed inside a netting and staked to the ground, used to slow runoff, trap…

Hydroseeding: Spraying a slurry of water, seed, fertilizer, fiber mulch and tackifier onto slopes and bare ground from a tank…

Coir fiber: Fibers mechanically extracted from the mesocarp of mature coconut.

See also: Coir Fiber for Geotextile Biomats · Coir fibre for erosion-control blanket makers · back to the coir glossary.

Sources.

  1. Mile High Flood District. Urban Storm Drainage Criteria Manual, Vol. 3, fact sheet EC-6: Rolled Erosion Control Products (RECP). Denver: MHFD, December 2022. www.mhfd.org/files/90385e8ab/42_EC-06+Rolled+Erosion+Control+Products.pdf
  2. Iowa Statewide Urban Design and Specifications (SUDAS). Design Manual, Section 7E-5: Temporary Rolled Erosion Control Products (RECP). Ames: Iowa State University, 2025 edition. Table 7E-5.01. www.iowasudas.org/wp-content/uploads/sites/15/2020/03/7E-5.pdf
  3. ASTM International. ASTM D6459-19: Standard Test Method for Determination of Rolled Erosion Control Product (RECP) Performance in Protecting Hillslopes from Rainfall-Induced Erosion. West Conshohocken, PA, 2019. store.astm.org/d6459-19.html
  4. DNIT (Brazilian National Department of Transport Infrastructure). Standard DNIT 074/2006-ES: Environmental treatment of slopes by erosion-control devices — Service specification. Rio de Janeiro: IPR, 2006. Items 3.1, 3.7, 3.8, 3.9. www.gov.br/dnit/pt-br/assuntos/planejamento-e-pesquisa/ipr/coletanea-de-normas/coletanea-de-normas/especificacao-de-servico-es/dnit_074_2006_es.pdf
  5. DNIT. Standard DNIT 102/2009-ES: Protection of the road body — Vegetative protection — Service specification. Rio de Janeiro: IPR, 2009. Items 5.1, 5.2. www.gov.br/dnit/pt-br/assuntos/planejamento-e-pesquisa/ipr/coletanea-de-normas/coletanea-de-normas/especificacao-de-servico-es/dnit102_2009_es.pdf
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About this page. Part of the coir glossary maintained by Carve Biorrefinaria Agroindustrial Ltda, a coir pith and fiber producer in Paraipaba, Ceará, Brazil. Corrections: comercial@carvebio.com.br.