Fiberschines/Biologs POLLUTANTS ADDRESSED: Nutrients and Organics, Sediments, Salinity
DESCRIPTION: The material used is a coconut-fiber roll product (fiberschine) used to stabilize the stream bank at the base of the slope. Plant cuttings are planting into thefiberschine and just behind it as well. When the fiberschine decomposes, plants will have rooted, stabilizing the stream bank.
POTENTIAL TREATMENT AREAS Streamsides
ALTERNATIVE MANAGEMENT MEASURES: Brush Layer Brush Mattress Brush Trench Pole Plantings Willow Fascines
LOAD REDUCTION MECHANISM: Nutrients/Organics Management - Vegetation planted in the fiberschine will take up nutrients from the water. Salinity Reduction - Plant s will also absorb dissolved salts. Sediment Reduction - Vegetation roots will stabilize stream bank.
PERMITTING REQUIREMENTS: None if installed by hand. Contact county regional flood control district.
LAND USE CLASSIFICATION: Disturbed areas Agricultural lands Grazing lands ADDITIONAL BENEFITS: Growing riparian vegetation will provide streambank stability and habitat for wildlife.
Arid Southwest BMP
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Fiberschines/Biologs POLLUTANTS ADDRESSED: Nutrients and Organics, Sediments, Salinity
Level 300: MILD ENGINEERING LOAD REDUCTION POTENTIAL: LOW
MEDIUM
3. Analysis and calculations may reveal that additional toe protection is necessary. In many cases, rock may be appropriate if placed properly. Improperly placed rock can result in erosion problems on the opposite streambank as well as downstream.
HIGH
ESTIMATED TIME FOR LOAD REDUCTION: IMMEDIATE
MONTHS2 YEARS
> 2 YEARS
4. Be sure to key the upstream and downstream end of the fiberschine into the streambank and secure it with some hard materials such as tree trunks or large rocks.
EXPECTED MAINTENANCE: LOW
MEDIUM
5. If this method is used in a highly erodible area and bank shaping is not possible, a tiered fiberschine technique may be necessary. Three fiberschines of different diameters are often used but various numbers and combinations of sizes can be used.
HIGH
ESTIMATED COST: LOW
MEDIUM
6. Never disturb the site unnecessarily. Remember the goal is to stabilize a site. The less it is disturbed the easier it will be to restore.
HIGH
PLANNING AND IMPLEMENTATION:
Riparian Planting Zone: Toe and Bank Zones.
1. Installation of the fiberschine can usually be accomplished throughout the year. High water periods should be avoided for safety reasons. 2. The fiberschine should extend upstream and downstream past the eroded area being treated to prevent flows from getting behind the fiberschine.
Arid Southwest BMP
50