The document discusses the advantages of buried diffusers for irrigation compared to drip irrigation. Key points: - Buried diffusers are a new underground irrigation technique that can be used for trees, shrubs, vegetables, and container plants. - They provide multiple advantages over drip irrigation including using 2 times less water, yielding 3-5 times more crop, and 0% water loss from evaporation. - Different types of buried diffusers are designed for various plant types. Once installed correctly, they require no maintenance and can substantially save water by reducing irrigation needs by up to 70%.

1. !
www.chahtech.com
Buried
Diffusers
Advantages
Compared
With
The
Drip
Irriga9on

2. 2
About
CHAHTECH
Considering
the
problems
of
water
in
the
arid
and
semi-­‐
arid
regions
in
the
world,
our
team,
lead
by
Dr.
Bellachheb
CHAHBANI
(senior
scienBfic
researcher
specialized
in
water
economy
and
efficient
use
of
hydraulic
resources)
spent
more
than
25
years
experimenBng
new
techniques
for
irrigaBon
and
for
the
injecBon
of
retenBon
water
or
natural
sources
water
to
be
conserved
in
the
deep
soil
layers.
These
researches
results
are
highly
innovaBve
products
such
as
The
Buried
Diffuser
and
The
Draining
Floater.
These
worldwide
patented
(PCT)
invenBons
were
awarded
mulBple
Bmes.
Chahtech
SA
manufacture
and
distribute
worldwide
the
different
products.
The
mean
objecBves
of
these
invenBons
are:
! Enhance
the
efficiency
of
water
resources
by
using
less
water
to
produce
more
food
! Increase
the
producBvity
of
rain
fed
agriculture
especially
rain
fed
trees
! Make
the
rain
fed
agriculture
sustainable
taking
in
consideraBon
the
irregularity
of
rainfall
! Conserve
Oasis
and
combat
deserBficaBon
! Combat
soil
salinizaBon
when
the
irrigaBon
water
contains
3
to
5
grams
salts
per
liWer
! …

3. 3
About
CHAHTECH
Chahbani
Technologies
was
created
with
a
high
desire
to
improve
the
human
life.
Our
core
values
are
driven
by
an
unfailing
wish
to
save
water
for
the
next
generaBons,
combat
famine,
combat
hunger,
combat
deserBficaBon...
Our
invenBons
and
commitments
were
awarded
mulBple
Bmes:
! Laureate
of
The
African
Forum
-­‐
100
innova9ons
for
sustainable
development,
Elysée
Summit
for
Peace
and
Security
in
Africa,
France.
2013
! The
Grand
Prize
INNOVATEC
2012/2013,
MIFFEL,
Avignon,
France.
2012
! TOP
20
Innova9ve
SME
of
InfoDev,
World
Bank,
Helsinki,
Finland.
2011
! UNESCO
Interna9onal
Water
Prize,
Budapest,
Hungary.
2009
! Maghreb
Union
Comba9ng
Deser9fica9on
Technologies
Prize.
2007
! ALECSO
Prize
(Arab
League
of
EducaBon,
Cultural
and
ScienBfic
OrganizaBon)
of
scienBfic
innovaBon
in
the
field
of
water.
2002
! Two
Silver
Medals
for
two
invenBons
-­‐
30th
InternaBonal
ExhibiBon
of
InvenBons,
Geneva,
Switzerland.
2002
! First
Prize
of
the
Tunisian
Associa9on
of
Inventors
for
researchers
inventors
granted
by
the
Tunisian
AssociaBon
of
Inventors
at
the
11th
NaBonal
CompeBBon
of
InvenBon
and
InnovaBon,
Tunisia.
2001
! First
Prize
of
The
WIPO
(World
Intellectual
Property
OrganizaBon)
for
the
best
invenBon
by
an
inventor
researcher
at
the
11th
NaBonal
CompeBBon
of
InvenBon
and
InnovaBon.
Tunisia.
2001
! Mediterranean
Prize
for
Water
award
from
the
Carrefour
Euro
Mediterranean
Water
HYDROTOP
! ...

4. 4
The
Buried
Diffuser
The
Buried
Diffuser
is
a
new
underground
irrigaBon
technique
which
can
be
used
for
trees
(fruit
trees,
forest
trees,
ornamental
trees)
and
shrubs,
vegetables
in
fields
and
in
green
houses
and
plants
in
containers,
pots
or
boxes.
The
Buried
Diffuser
is,
with
no
doubt,
the
most
efficient
technique
to
bring
water
to
the
roots.
In
few
words,
The
Buried
Diffuser
is:
! New
solu9on
to
save
irriga9on
water,
energy,
fer9lizer,
etc.
! 0%
waste
by
evapora9on
! 2
9mes
less
water
than
the
drip
method
! 3
to
5
9mes
more
yield
than
drip
irriga9on
! Very
simple
installa9on
and
use
! Not
expensive
! Innova9ve
with
high
commercial
poten9al
! Most
effec9ve
underground
irriga9on
system
! Allows
An9cipated
Irriga9on
during
the
rain
period
and
no
irriga9on
during
the
dry
period
! Allows
The
injec9on
and
the
conserva9on
of
water
in
the
deep
soil
layers

5. 5
The
Buried
Diffuser
We
design
and
manufacture
three
different
Buried
Diffusers.
Each
one
has
its
own
technical
details
which
make
it
the
most
efficient
for
its
specific
uses.
Trees
Buried
Diffuser
Vegetables
Buried
Diffuser
Container
Plants
Diffuser

6. 6
The
Buried
Diffuser
Advantages
of
The
Buried
Diffuser

7. 7
The
Buried
Diffuser
Once
The
Buried
Diffuser
is
correctly
installed,
no
maintenance
is
needed.

8. 8
The
Buried
Diffuser
Substan9al
water
saving
The
water
saving
reaches
100%
(0%
evaporaBon),
thus
the
irrigaBon
frequency
is
considerably
reduced.
The
Buried
Diffuser
uses
only
30%
of
the
water
amount
used
by
drip
irrigaBon
to
produce
the
same
weight
of
crop.
Because
water
losses
due
to
evaporaBon,
deep
percolaBon
and
runoff
are
minimized.
The
comparison
of
Buried
Diffuser
with
surface
and
drip
irrigaBon,
during
2
months
of
summer
2012,
demonstrates
the
superiority
of
the
diffuser
in
water
conservaBon.
61
days
aher
the
irrigaBon,
The
Buried
Diffuser
allowed
to
conserve
34
%
of
the
iniBal
irrigaBon
water
amount
when
the
surface
irrigaBon
allowed
only
3,4%
and
the
drip
irrigaBon
allowed
8%.
Higher
yields
Water
and
nutrients
delivered
directly
to
the
root
zone
promote
healthy
plant
growth
and
reduce
plant
stress.
Healthier
and
beYer
quality
crops
Soil
and
foliage
are
kept
dry,
reducing
fungal
diseases
caused
by
surface
or
overhead
irrigaBon.
Eliminates
fruit
and
vegetable
spoing.
Improved
soil
aera9on
Fine
soil
parBcles
are
not
washed
down,
decreasing
soil
compacBon
and
improving
root
growth.

9. 9
The
Buried
Diffuser
Melon and pimentos in
greenhouse irrigated
with Buried Diffusers!
The
Buried
Diffuser
reduces
diseases
because
there
is
no
weWed
soil
and
no
weeds.
In
green
houses,
since
there
is
no
water
evaporaBon
from
The
Buried
Diffuser,
water
vapor
in
the
atmosphere
is
considerably
decreased.
This
reduces
the
appearance
and
propagaBon
of
diseases
such
us
mildew.
This
low
rate
of
water
vapor
inside
the
greenhouses,
facilitates
the
movement
of
pollen
and
increase
the
rate
of
flowers
producing
fruits.

10. 10
The
Buried
Diffuser
Important
reduc9on
of
labor
for
the
maintenance
of
soil
Less
weeds
pulling
out,
less
irrigaBon
frequency,
less
mulching
acBons,
easier
ferBlizer
applicaBon,
less
weed
and
disease
control
and
less
maintenance,
which
means
less
handling.
Important
Energy
saving
The
pumping
Bme
is
less
important
because
of
the
reducBon
of
needed
irrigaBon
water.
In
addiBon
to
that
the
energy
saving
is
higher
when
the
diffuser
works
with
gravity.
In
addiBon
of
using
convenBonal
pressure
(1-­‐2
bars).
The
Buried
Diffuser
operates
at
low
pressure
(0.02
-­‐
0,2
bar).
The
water
comes
from
a
simple
barrel
or
tank
(100
-­‐
5000
liters)
placed
on
the
soil
surface.
In
this
case
the
irrigaBon
is
done
by
gravity
and
does
not
need
pumping.
This
induces
important
energy
saving.
Important
reduc9on
of
fer9lizers
amounts
Less
degradaBon
of
the
ferBlizers
and
less
loss
by
leaching.
FerBlizers
are
directly
delivered
to
the
roots.
Reduced
nutrient
amounts
without
yield
reducBon.
Longer
life
for
water
distribu9on
pipes
All
the
network
could
be
totally
buried
(20
cm
below
the
topographic
surface).
Less
animal,
human,
sun
or
mechanical
damage.
The
irrigaBon
water
distribuBon
network
of
The
Buried
Diffusers
could
be
totally
buried
(20
cm
below
the
topographic
surface).
This
avoids
the
damages
caused
by
animals
(dogs,
foxes
etc.)
or
human
beings.

11. 11
The
Buried
Diffuser
An
important
reduc9on
of
the
number
of
irriga9ons:
This
is
a
result
of
water
saving
which
prolongs
the
duraBon
between
two
irrigaBons.
This
was
confirmed
by
the
comparison
of
irrigaBon
of
ornamental
plants
in
containers
using
surface
irrigaBon
and
Buried
Diffusers.
The
results
of
this
trial
show:
! Aher
2
months,
the
water
content
in
the
containers
irrigated
by
Buried
Diffusers
is
89%
and
91%.
For
the
surface
irrigaBon
the
values
are
respecBvely
51%
and
54%
! Aher
4
months,
the
water
content
in
the
containers
is
22,6%
and
20,6%
for
the
surface
irrigaBon
and
81%
and
84%
for
The
Buried
Diffuser
This
means
that
in
a
programmed
irriga9on,
when
the
water
content
in
the
containers
reaches
50%
of
the
field
capacity,
the
periodicity
of
irriga9on
is
2
months
for
the
surface
irriga9on
and
6
months
for
the
Buried
Diffuser.

12. 12
The
Buried
Diffuser
An
important
reduc9on
of
number
of
irriga9ons
This
is
a
result
of
water
saving
which
prolongs
the
duraBon
between
two
irrigaBons.
For
trees
plantaBons
irrigated
with
Buried
Diffusers,
if
the
soil
(below
50
cm
deep)
is
thick
(1
meter
or
more)
and
has
minimum
10%
clay,
the
irrigaBon
is
once
per
month
(12
irrigaBons
per
year)
or
one
per
3
months
(4
irrigaBons
per
year).
Important
reduc9on
of
soil
saliniza9on
When
using
salty
irrigaBon
water
(3
to
5
grams
salt
per
liWer),
this
reducBon
is
esBmated
to
9000
kilograms
per
year
and
per
hectare
(with
irrigaBon
volume
of
10000
cubic
meters
with
3
grams
per
liWers
salts,
3000
cubic
meters
of
the
volume
are
evaporated).
Less
water
distribu9on
pipes
lines
Only
one
pipeline
is
needed
instead
of
2
or
4
pipelines
for
drip
irrigaBon.
Important
reduc9on
of
Herbicides
and
pes9cides
No
weeds
for
vegetable
fields
and
trees
plantaBons,
this
is
a
great
contribuBon
in
the
protecBon
of
the
environment.
BeYer
Look
The
irrigaBon
water
distribuBon
network
could
be
totally
buried
(20
cm
below
the
topographic
surface)
when
using
Buried
Diffusers.

13. 13
The
Buried
Diffuser
The
Buried
Diffuser
is
recommended
for
organic
farming
because
it
reduces
weeds
and
diseases
development.
This
helps
a
beYer
growth
of
the
plants
without
using
herbicides,
pes9cides
and
other
chemical
products.

14. 14
The
Buried
Diffuser
Irriga9on
technique
Volume
of
irriga9on
water
per
plant
(in
liter)
Total
produc9on
in
for
112
plants
(in
kilograms)
Buried
Diffuser
500
716
Drip
500
141
Buried
Diffuser
250
382
Drip
250
103
Trial
results
of
comparison
of
irriga9on
by
drip
and
by
Buried
Diffusers
in
the
greenhouse
of
farmer
field
in
Region
Maatoug
(Desert
of
south
of
Tunisia)
The
Buried
Diffuser
produces
3
to
5
&mes
more
yield
than
the
drip
method.

15. 15
The
Buried
Diffuser
You
can
measure
the
superiority
of
The
Buried
Diffuser
compared
to
all
other
irritaBon
irrigaBon
systems
by
doing
a
simple
trial
(with
one
or
many
trees
of
the
same
size)
with
4
plots.
! In
the
first
plot,
trees
irrigated
with
The
Buried
Diffuser.
! In
the
second
plot,
trees
irrigated
with
another
irrigaBon
technique.
The
first
and
the
second
plot
have
to
be
irrigated
with
the
same
water
volume
(V)
during
a
year.
! In
a
third
plot,
trees
irrigated
with
30%
of
water
volume
(V)
using
The
Buried
Diffuser.
! In
a
forth
plot,
trees
irrigated
with
30%
of
water
volume
(V)
using
another
technique.
Aher
the
harvest
you
compare
the
yield
in
the
different
plots.
Try
it,
you
will
Adopt
it

16. 16
The
Buried
Diffuser
The
diffusers
include
small
water
reservoirs
to
be
filled
during
the
irrigaBon.
For
the
first
use,
the
Diffuser
will
irrigate
unBl
the
soil
(contained
in
the
containers,
boxes
or
pots)
is
completely
weWed.
The
moisture
of
the
container
soil,
aher
the
irrigaBon
using
the
diffusers,
is
sufficient
for
several
days
or
weeks.
The
dura9on
between
2
irriga9ons
is
at
least
3
9mes
longer
than
the
exis9ng
irrita9on
irriga9on
methods
(capillarity,
surface,
dripping…).
The
Buried
Diffusers
for
containers
can
also
be
used
to
produce
vegetables
in
the
balcony
of
apartments
or
individual
houses.

17. 17
Chahtech
Blog
+BellachhebChahbani
Chahtech
Channel
@ChahbaniT
LinkedIn
Profile
Dr.
Bellachheb
CHAHBANI
CEO
&
Founder
Email:
bchahbani@chahtech.com
Skype:
lachheb25
Tel:
+216
98
25
43
83
Web:
www.chahtech.com