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HydroStraw ™

Description

HydroStraw ™ is a ground (and also available in pellet form) straw made from Kentucky Bluegrass and commonly used as a mulch to aid in water retention and evaporation reduction to increase plant survivability in drought prone and semi-arid environments. HydroStraw ™ is available bulk dry form. This Support Practice ™ is specifcally designed to be used with Temporary seeding/Slope protection/ Storm water blankets.

Function

The surface application of HydroStraw ™ to any Temporary seeding/Slope protection/Storm water blanket can decrease seed germination time, the time to 70% uniform vegetated cover, and increase above ground vegetation biomass. These benefts will function to increase erosion control, slope stabilization, and success of any vegetation establishment and/or slope stabilization project. Vegetation cover has been shown to be effective at reducing moisture loss in various growing media and soils; therefore, reduced irrigation or increased survivability during dry periods may be an additional beneft to adding HydroStraw ™ to Filtrexx ® BMPs that utilize GrowingMedia ™ . Independent laboratory testing conducted at the University of Georgia showed that the addition of HydroStraw ™ to grass seeded Slope protection, relative to grass seeded Slope protection without HydroStraw ™ , reduced the number of days to seed germination by 25%, time to 70% uniform vegetated cover from 9 weeks to 8

weeks (11% reduction), time to 90% cover from 12 weeks to 10 weeks (17% reduction).

For more information on this project see Filtrexx ® Tech Link #3315 in the Appendix.

Installation

1. Where required, HydroStraw ™ shall be surface applied manually or mechanically over the entire surface of Temporary seeding/Slope protection/Storm water blankets during installation.

2. HydroStraw ™ may be mixed and uniformly blended with specifed grass seed, and applied together in one step on a uniform coverage basis to the area where moisture retention for vegetation establishment is specifed.

3. HydroStraw ™ shall be applied at a rate of 90 lbs/1000 sq. ft or 4000 lbs/acre (4535 kg/ha).

Inspection & Maintenance

HydroStraw ™ may be reapplied if application is not uniform, a large runoff event occurs prior to vegetation establishment, if dry areas appear localized on surface application, cover is not uniform, or uniform cover is less than 70%.

Method of Measurement

Bid items shall show measurement as HydroStraw ™ + Filtrexx ® BMP per square ft, per square yd, per square m, per hectare, or per acre installed.

Section 3: Support Practices ™

HydroStraw

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Vegetation Enhancement Technology