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BMP Site Prep.
With the upcoming El Nino forecasts for this winter, what better time than now to learn erosion control to prepare for the upcoming major storms predicted. This summit will teach you better management practices with hands on demonstrations and introduce you to some of the new products available on the market through our vendor participation. We hope to see you there, it’s going to be a good one!
The Site is Coming Together.
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Here are some photos from the Hydromulch-compost study from 2009/2010.
In the study we looked at the accuracy in the anecdotal theory that "high rates of BFM (4000#/ac) would reduce seed germination and grass establishment." We constructed approximately 20 plots that has uniform soil prep (trackwalking), broadcast mychorrizae uniformly, then manually applied the CA native seed blend to the soil surface at a rate of 20#/ac. The seed was then covered with several kinds of commonly used hydromulches - Soil Guard, Flexterra, TeraMulch, hydrostraw, and a cotton mulch. The study is available for free download by scrolling down to NAVIGATION and clicking on WYD Files.
The plots were visually monitored for photodocumented for density of plant establishment during that first Winter, Summer, and the following Fall seasons. We documented NO discernible ill effects from higher rates. Actually just the opposite!!! was true.
That particular winter had unusually intense storms and the lower rates of hydromulch resulted in quite a bit more erosion - there were small deltas of fine sediment observed at the bottom of the 2000#/ac plots, irregardless of mulch brand. Subsequently we observed less vigorous and dense establihment on those 2000#/ac plots.
Note the compost plot on the left, this is just two months after application.
What is most significant is that we also applied a compost blanket 2" thick. There was NO reduction of seed establishment, if fact the compost blanket grew the BEST grass, both by covering seed with 2" of compost and by gently raking the seed into the surface - there was no dicernable difference.
Hope you enjoy and hope this paper somewhat "lays to rest" the notions that Compost Blankets at 2"-thick and BFM at 4000#/ac will smother seeds. We must, as EC Specialists, find a balance between veg establishment and effective erosion control during the establishment period.
Another observation made at this trial was that weeds did not become established on the plots, even though weeds grew almost everywhere else! My personal hunch is that adding mychorrizae made the difference. My theory is that California native, mychorrizal-dependant grasses and mychorrizae will "out compete" many of the commom noxious weeds. This could be another comparative study!! Native grass establishment with and without mychorrizae.
Another potential study will be to do side-by-side comparisons of compost and the "new" biotic soil formulated hydromulches. These hydromulches could prove to be cost-effective over compost. Let's try it!!
Bio Draw 3.0 is an interactive cd which describes design and installation procedures for 38 biotechnical soil stabilization techniques, along with 39 typical drawings of soil bioengineering techniques.
Incorporate Live Vegetation...
All erosion control techniques presented incorporate live vegetation. Bio Draw is intended to help solve engineering problems while meeting the ever-increasing environmental demands prescribed by sensitive ecosystems. NPDES Phase II compliant!
Bio Draw describes in detail a series of "soft" bioengineering techniques and practices such as LIVE FASCINES, LIVE POLE DRAINS, COIR ROLLS WITH BRUSHLAYERING, POLE PLANTING, MODIFIED BRUSH LAYERS, BRUSH MATTRESSES, and MORE! (click here for Sample Typicals)
Before & After Illustrations...
The Bio Draw CD is liberally illustrated with "before" and "after" photos of real case studies which describe various installation steps for each technique. Clicking on the photos will expand them so details can be readily observed.
Proven & Tested Practices...
All of these practices have been implemented and monitored for their effectiveness by bioengineering practicioners!
Bio Draw 3.0 is the most credible and comprehensive bioengineering compendium in the erosion control industry today!
Drawings & So Much More...
Not only do you get CAD drawings and construction specifications, but you also get comprehensive information for all aspects of biotechnical projects, such as the principles, rationale, and planning for a bioengineered approach.
The BMPs are conveniently separated into "Soil Bioengineering and Biotechnical Stabilization Practices (Ground Bioengineering)" and "Biotechnical Streambank Stabilization (Water Bioengineering)".
Many informative photos accompany each BMP, showing installation procedures along with "before" and "after" shots of case studies. Each colorful photo can be portrayed in a larger view with the click of your mouse. (click here for Sample Typicals)
Easy to Use..
The CD is user-friendly, and it's as easy as navigating through this website. Technical support is also readily available if needed.
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