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POND LINING FILM & CANAL LINING FILM |
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BL3206 – Pond / Canal Lining film |
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| Specifications: |
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Thickness |
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100 to 500 MICRON |
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Width |
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2 meter to 5 meter (Lay Flat) |
| 3. |
Color |
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Black, Blue or Any Colour |
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| BL 3206 Pond / Canal Lining Film |
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The rain water gets drained
away from lands for lack of a proper catchment area. Also a
large amount is lost due to seepage in ground. Often the precious
water is missed due to drainage and seepage. The green fields
turns brown and parched in the drought. Now this loss can be
stopped by ESSEN’s SUNCOOL range of Pond and Canal Lining
Films.
Water is precious:
In India agriculture contributes 40% to our country’s
GNP and gives subsistence to 70% of our population. And yet
1/3 of our total geographical area is drought –prone because
we are dependent upon the monsoons which can be erratic. Drought-prone
areas have to be provided water not only for human and cattle
consumption but also for irrigation. Whereas even after good
monsoons water is not available only because of lack of proper
management and storage as mentioned in beginning.
The
solution:
Water Management. The cheapest and purest source of water is
rain water. Harvesting of the water in pond, lakes, wells, tanks
and reservoirs helps to preserve this water so that it can be
put to varied uses later on. One of the most effective ways
of water management is through Pond / Canal Lining.
Why pond lining?
These reservoirs and ponds are located in a variety of soil
types which –exhibit a wide range of seepage characteristics.
Because of seepage, the water level of the reservoirs and tanks
depletes rapidly.seepage losses not only mean loss of useful
water but also lead to other problems such as breach in the
embankment, waterlogging and increased salinity in adjacent
areas.
With appropriate lining of reservoirs, ponds, canals the seepage
loss can be minimized.
The Lining film:
Lining film is a revolutionary concept in water management which
dramatically reduces seepage loss at a reasonable cost.
Lining film is tough, multilayer, wide width, black, low density
polyethylene (LDPE) film by the latest Co-extrusion blown film
technique it is available in various widths (4 to 10 metres)
and thicknesses (100 to 250 microns).
The ESSEN’s Pond / Canal Lining film has excellent mechanical
properties which meets the specifications for LDPE films as
per IS:2508-1984. Moreover its multilayer structure significantly
improves the film properties like impact strength, tear resistance,
flex crack resistance, environmental stress cracking resistance,
etc. ESSEN’s Multilayer Lining film has excellent water
barrier properties (practically nil water permeation), very
good blend of physical properties such as tensile-impact streanth
coupled with good weatherability and chemical resistance properties.
Procedure to construct a Lined Pond:
First of all the pond dimensions (L*B*D, Side Slope) are to
be identified and than mark the top level as well as the bottom
level length and breadth on the ground clearly. Put pegs at
the corners of the pond and tie a rope to demarcate pond dimensions.
Next start digging the pond from the inside rectangle as shown
in Fig (l*b) and dig till desired depth is achived. Excavated
soil can be kept near the pond around the demarcated periphery
and can be used later after screening as a soil cover. Screening
is very important as it will remove big boulders and sharp edged
gravel which could damage the plastic film.
Precautions:
Digging along the slope is a tedious task but it must be done
meticulously as the durability of the structure depend on it.
If desired, a bamboo frame can be used to achieve uniform digging
as per the desired slope.
Making the Bamboo
Frame:
It can be constructed in a triangular shape of the desired slope
e.g. if a slope is n:1 and the desired depth is ‘d’
then the bamboo structure sould be framed as shown in fig. Recommended
side slope in case of soil cover (Horizontal : Vertical) is
3.5 : 1 and in case of Brick lining it is 2:1.
Further:
The next comes - Dressing. This is to be done carefully, it
includes the removal of all sharp edged objects inside the pond
otherwise the Lining film will get punctured.
Toe-wall:
If we are going for soil cover in bed and sides, there is no
need for constructing toe-wall. But for a Brick Lining in the
side, a toe-wall is essential to support the side bricks. For
this a trench 30cms x 30cms minimum is to be dug along the bottom
periphery of the pond. This trench is also to be dressed to
prevent sharp objects damaging the lining. Once the toe-wall
is constructed than the brick lining of the sides should be
done from bottom to top.
A small trench (15cms x 15cms) is to be dug around the external
periphery of the pond to anchor the plastic film. This trench
could be approximately 1 metre away from the external boundaries
of the pond. Now the pond is ready for the laying of the film.
The Dos & the Don’ts:
Dos: |
- Ensure a good dressing before laying the film.
- Ensure that the film handling is minimum.Ensure that the
jointing of the film is done by heat sealing at the site
itself and the seals are proper enough to not allow the
leakages.
- Ensure that the brick as well as cement mortar is of the
right specification.
- Recommended ratio of cement sand is 1:4 for bricks lining.
- Ensure a systematic procedural follow up and the use of
right quality material and good workmanship.
- Make a judicious selection of type of lining to be adopted
which are site specific.
- Wherever percolation is essential for recharging of ground
water, Lining film should not be used.,
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| Don’ts: |
- Don’t drag the film.
- Don’t walk on the film while it is being laid, and
once it is laid, don’t expose it to sharp objects
or rough handling.
- Avoid exposure of the film to sunlight.
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The Overall Benefits:
Water harvesting and its conservation in an Lined pond is useful
to get the maximum benefit from each rain drop, so that no water
is wasted in runoffs. It is tailor-made for the lining of Canals
and Reservoirs, Field Channels, Salt Pans, Fish Ponds and in
various other heavy duty applications in the areas of agriculture
and Water Management. |
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