Vertical Bundle POLLUTANTS ADDRESSED: Nutrients and Organics, Sediments, Salinity
DESCRIPTION: This technique uses bundles of willow cuttings placed in vertical trenches along an eroding streambank. The willow cuttings will sprout and take root, thus stabilizing the streambank with a dense matrix of roots. LOAD REDUCTION MECHANISM: Nutrients/Organics Management- Through plant uptake Salinity Reduction- Through plant uptake Sediment Reduction – Vegetation roots will stabilize stream bank
ALTERNATIVE MANAGEMENT MEASURES: Brush Revetment Erosion Control Fabric Fibeschines/Biologs Post/Pole Plantings Seeding PERMITTING REQUIREMENTS: Generally none if installed by hand. If vertical bundles are part of an extensive stream project or if mechanical means are used, a permit under Sections 404 & 401 of the Clean Water Act may be required.
LAND USE CLASSIFICATION: Agricultural lands Grazing lands ADDITIONAL BENEFITS: Rooted willows will provide basis for the development of
Arid Southwest BMP
riparian plant communities and habitats for riparian animal species. POTENTIAL TREATMENT AREAS: Streamside
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Contact county regional flood control district.
Vertical Bundle POLLUTANTS ADDRESSED: Nutrients and Organics, Sediments, Salinity
Level 300: MILD ENGINEERING LOAD REDUCTION POTENTIAL: LOW
MEDIUM
HIGH
ESTIMATED TIME FOR LOAD REDUCTION: IMMEDIATE
MONTHS2 YEARS
> 2 YEARS
EXPECTED MAINTENANCE: LOW
MEDIUM
HIGH
ESTIMATED COST: LOW
MEDIUM
HIGH
SOURCES OF ADDITIONAL INFORMATION: http://plantmaterials.nrcs.usda.gov/pubs/idpmcpustguid.pdf http://www.srnr.arizona.edu/nemo/BMPdocs/Streambank StabilizationManagementMeasures.pd
PLANNING AND IMPLEMENTATION: 1. Coyote willow (Salix exigua) is a particularly good species for this method because of its' dense root system. Seep willow (Baccharis salicifolia) is another useful species that is widely available. 2. If this method is used in a highly erodible area, some protection should be placed in front of the wattles to prevent scour. Analysis and calculations of forces will provide guidance for suitable toe protection. In some cases, brush revetment or fiberschines may be adequate, while other situations may require rock. If no other protection is used, the wattle should be 12 to 24 inches in diameter. 3. Another variation of this technique is to cover the wattles with erosion control fabric to prevent the soil from being washed away from the wattles. Secure the fabric under the first wattle. Poles can be planted into the permanent water table between the wattles. The following illustration also shows the use of a rock toe to prevent scour. 4. Rooting hormones and fertilizers do not significantly improve success for the cost of the materials. 5. 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. Riparian Planting Zone: Toe and Bank
Arid Southwest BMP
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