Geotextiles - An Effective Soil Erosion Prevention Method

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22 Φεβ 2014 (πριν από 3 χρόνια και 7 μήνες)

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Apr. 3, 2013

CoirGreen™
Geotextiles

-

An Effective
Soil Erosion

Prevention Method

Courtesy of
Coir Green Pvt. Ltd. (CG)




“The different coir types and their characteristics have made coir the most versatile natural fiber
to combat erosion and to restore waters and wetlands. Thus, coir seems to be the miracle fiber of
this century to save the earth, its waters and wetlands”


Land and Water Magazine


The use of natural fibers for erosion and
sedimentation

control dates back to the beginning of this
century. The main problems in the early natural fiber textiles (example jute mats) were low
tensile strength, high elongation and low durability. These dra
wbacks restricted their use to only
less severe erosion problems. An alternate natural fiber that has drawn the attention of the
erosion and
sedimen
tation

control industry is coir, the coconut fiber.


One of the most effective and yet natural
soil erosion

prevention techniques is the use of coir
geotextiles

(
coir netting)

fabrics.
CoirGreen

geotextiles

have no synthetic material but are instead
made out of organic fiber coir, which is extracted

from the husk of a coconut. Coir is strong,
durable, waterproof and one of the few natural fibers that is salt water resistant.


The lighter varieties of coir woven
geotextiles

are used for immediate
soil erosion

and ordinary
soil conditions while the heavier coir
geotextiles

are used for embankments, slopes or vegetation.
CoirGreen

geotextiles

protect the soil until the vegetation permanently covers its mesh.


It gives
the plants adequate room to grow and decomposes naturally into humus which will enrich and
nourish the soil. Lasting betwee
n two to five years the coir fiber, compared to other natural fibers
such as jute, has several unique features. CoirGreen
geotextiles

have the ability to retain water
three times more than its actual weight preventing the need to frequently water the plants.
However, at the same time with its adequate space within the mesh it drains the excess water
easily preventing water logging. With

an easy installation method the CoirGreen
geotextiles

need
no
chemical treatment

as it lets in the right amount of air and light for a deeper rooted plant. It
can also endure animal and human movements that would generally lead to more environmental
decay.


The Food and Agriculture Organization (FAO) states
,


“Recognition of coir for sustainable vegetation and
erosion control

arises from the fact that it is
an abundant, renewable natural resource with an extremely low decomposition rate and high
strength compared to other natural fibers. Coir is
woven into thick textiles which are applied like
blankets on the ground in erosion prone areas.
Geotextiles

made from coir are durable, absorb
water, resi
st sunlight, facilitate seed germination, and are 100% biodegradable. These blankets
have high strength retention and a slow rate of degradation meaning they last for several years in
field applications”.


Studies conducted have proven that coir
geotextiles

are effective, inexpensive and
environmentally friendly. In one study conducted in 1998 on coir geo textiles, Schuerholz found
out that coir retained 20
% of its strength a year later


and 90% humidity whereas jute
biodegraded fully after eight weeks.


In another study, conducted in Kerala, India, with a farmer
community in 2005, scientists found out that coir combined with local grass


prevents
soil
erosion
.


CoirGreen
geotextiles

have varying densities

depending on their application, but as a whole they
serve as
slope stabilization

agents prior to re
-
vegetation. CoirGreen
geotextiles

promote new
vegetation by absorbing water and preventing topsoil from drying out. They absorb
solar
radiation

just like natural soil, and unlike
geosynthetic materials
, they p
rovide good soil support
for up to three years, allowing natural vegetation to become established. The greater the
geotextile density, the steeper the embankments it can be utilized on. Applications have included
ski slopes and bottom reinforcing material
in water courses.




The uses of CoirGreen
geotextiles

can be summarized as below,



Stream/River bank protection



Shoreline stabilization



Slope stabilization

in railway cutting and embankments



Separation application in rural roads, railways, parking and storage areas


and stor
m
shuttering



Reinforcement of rural unpaved roads, temporary walls providing sub base layers in road
pavements



Filtration in road drains and land reclamation



Containment of soil and concrete as temporary seeding



Concrete column curing



Waste protection and
forestry

re
-
vegetation



Control of shallow mass waste and
gully

erosion



UV protection for underground crops



Rooftop

landscaping



Protection from
wind erosion

and wetland environments



Plant and tree protective systems

More information on CoirGreen
Geotextiles

or other natur
al products, please visit
www.coirgreen.com
.