The Latest Developments in Non-structural Alternatives for

P R O G R E S S I V E B I O E N G I N E E R I N G :

The Latest Developments in Non-structural Alternatives for Shorel ine Stabi l izat ion

B a s e d o n S i t e S p e c i f i c C r i t e r i a

If a beach has a base elevation.


The function a fringe marsh plays.


Near shore characteristics like fetch, water depths, sand

bars, and location within a given littoral cell.

The function a fringe marsh plays.



B i o e n g i n e e r i n g S t r a t e g i e sI m p o r t a n c e o f F r i n g e M a r s h e s i n C o a s t a l S t a b i l i z a t i o n


• Woven coir-filled mats used as a growing medium.

• Pre-vegeated to establish prior before installation.


F i b e r R o l l A r r a y

B e a c h E l e v a t i o n

H i g h T i d e



H i g h T i d e



B e a c h E l e v a t i o n

H i g h T i d e

I n s t a l l a t i o n & C a s e S t u d i e sF r i n g e M a r s h e s

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M a t e r i a l s f o r S t a b i l i z i n g C o a s t a l B a n k s

B i o e n g i n e e r i n g S t r a t e g i e s

• Coir fiber roll and reinforced fiber roll lifts add stability and protection to the toe of a bank and provides a window of opportunity to establish vegetation.



• Robust anchoring systems.



• Erosion control blanketing composed of natural fibers are used to stabilize soils above the fiber rolls allowing time for native salt tolerant plants become established.



• Resists degradation from the marine environment.

• Absorbs some of the force of wave energy unlike many hard solutions that deflect the energy of wave action to surrounding areas.

• Materials life-expectancy to stabilize sediments matches the time required to establish native plants.



• Establish native plants.

P r e - v e g e t a t e d F i b e r R o l l s

S a l t M a r s h

N a t i v e G r a s s e s a n d S h r u b s



2 ’ 2 ’

4 ’ 4 ’

6 ’ 6 ’

8 ’ 8 ’

1 0 ’ 1 0 ’Sideoats Grama

Big Bluestem BayberryLittleblue Stem

Switchgrass Indiangrass

• Root Depths of Native Plant Species

I n s t a l l a t i o n & C a s e S t u d i e s


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T y p i c a l E r o d i n g B a n k


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I m p o r t a n c e o f E s t a b l i s h i n g a S t a b l e S l o p e

• Utilizing a portion of the upper bank can create a more stable slope angle.• Adds increased stability and storm damage prevention to the bank. • Without this step, an investment in bioengeneering can be lost due to bank collapses.

(MA CZM Storm Smart Properties Fact Sheet 4)


31 2

S t a b i l i z i n g t o e o f b a n k - F i b e r r o l l s

• Installation begins at the base of the array and proceeds up bank.• Proper anchoring strategy to hold toe protection in place. • Synthetic filter fabrics DO NOT ENHANCE success of a bioengineering project.


31 2

S t a b i l i z i n g t o e o f b a n k - P r e - v e g e t a t e d f i b e r r o l l s

• Use of pre-vegetated fiber rolls along top of array.• Added vegetation to the root matrix. • Full season of plant growth prior to installation.


431 2

S t a b i l i z i n g s o i l s a b o v e t o e p r o t e c t i o n

• Native salt tolerant grasses are seeded into the bank prior to installation of erosion control blankets.

• The erosion control blankets protect soils from erosion and helps to retain moisture to promote seed germination.

S W I T C H -G R A S S

S I D E O A T S G R A M A

L I T T L E B L U E S T E M


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S a n d c o v e r f o r f i b e r r o l l s

• Sand nourishment protects coir fiber rolls from photo-degredation “Sun Block”.• Nourishment also functions as sediment source to the adjacent coastal resource areas.


53 41 2

N a t i v e p l a n t s p e c i e s

• Native beach plum and bayberry planted through erosion control blanketing.• Temporary above ground irrigation for plant establishment.

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63 4 51 2

• Establishment of native vegetation after two seasons of growth.

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N a t i v e p l a n t s p e c i e s


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• Condition of fiber roll array following Hurricane Sandy - 11/2012

Waves reached above fiber roll array with no damage.

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8 93 4 5 6 71 2

• Condition of fiber roll array following named storm Nemo - 2/2013


83 4 5 6 71 2

• Condition of fiber roll array following named storm Nemo - 2/2013

W a v e s r e a c h e d a b o v e f i b e r r o l l a r r a y w i t h n o d a m a g e .

9


3 4 5 6 7 8 91 2

• Fiber roll array increased in length by 90’ - 6/2013

P h a s e 1 P h a s e 2

1 0


3 4 5 6 7 8 9 1 0 1 11 2

E v o l u t i o n o f B i o e n g i n e e r i n g

E v o l u t i o n o f B i o e n g i n e e r i n g S a n d E n v e l o p e s



E v o l u t i o n o f B i o e n g i n e e r i n g R e i n f o r c e d F i b e r R o l l L i f tU . S . P a t e n t N o . 1 0 , 1 2 5 , 4 6 2




E v o l u t i o n o f B i o e n g i n e e r i n g

R e i n f o r c e d F i b e r R o l l L i f t U . S . P a t e n t N o . 1 0 , 1 2 5 , 4 6 2


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P R O G R E S S I V E B I O E N G I N E E R I N G :

The Latest Developments in Non-structural Alternatives for Shorel ine Stabi l izat ion

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The Latest Developments in Non-structural Alternatives for