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COASTAL PROTECTION MEASURE FOR
CONTROL OF COASTAL EROSION AT
PENTHA IN KENDRAPARA DISTRICT,
ODISHA
DEPARTMENT OF WATER RESOURCES
GOVERNMENT OF ODISHA
INTEGRATED COASTAL ZONE MANAGEMENT
PROJECT ( ICZMP) , ODISHA
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CONTENTS
2 Introduction
Erosion as observed from time to time
Survey & Bathymetry variations
Revised Design of geo-textile tube embankment
due to effect of very severe cyclone Phailin (Oct 2013).
Revised Alignment & Cost Revision
Revised construction Program & extension of intended period of completion.
Progress photographs
Observations during Hud Hud (12th Oct 14)
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DEPARTMENT OF WATER RESOURCES, GoO,
Map of Kendrapara District showing rivers and coast line
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DEPARTMENT OF WATER RESOURCES, GoO, PEA
Bairds & Associate, Canada-2002
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6
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Sea-Facing Saline Embankment in Rajnagar Block
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DEPARTMENT OF WATER RESOURCES, GoO,
1. Location of the Project :
The site is near village Pentha of Rajnagar –Gopalpur Saline
Embankment in Kendrapada District of Odisha.
Lat : N-200-32’-22.40” & Long : E -860-47’-16.0”
2. Objective of the Project :
• The objective was to protect the existing embankment, immediate
cultivable land of 6883 Ha, habitation of village Pentha and adjoining
villages from wave action.
• To study the performance of geo-tube embankment including
instrumentation to measure performance under field condition after
installation
3. Problem faced
• Shoreline of Pentha is shifting towards countryside
• In 2005, shore line was 200m away from existing embankment
Present proposal- Construction of Geo-Tube Embankment
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DEPARTMENT OF WATER RESOURCES, GoO,
In 2008, shoreline was 20m away from existing old
embankment.
Traditional method of protection using wooden
stump piling and Big Resin PVC sand bag dumping
was done every year.
In the Year 2009-10, a retard embankment was
constructed on the backside of the old
embankment at a distance of 60 metre
In 2011-12, the shoreline over-ran the old
embankment for a length of 400 metre & washed
away the embankment for 350 metre length.
Problem faced: contd…
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DEPARTMENT OF WATER RESOURCES, GoO,
Pictures of the site (Construction of retard embankment is made at 60mtr distance from
the old embankment during the Year 2009-10 )
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DEPARTMENT OF WATER RESOURCES, GoO, PEA
Bairds & Associate, Canada-2002
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DEPARTMENT OF WATER RESOURCES, GoO,
Index Map of area of the Project for protection
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DEPARTMENT OF WATER RESOURCES, GoO,
Pictures of the site: (Dt. 25.09.2007)
Shore line 20 metre away from embankment
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DEPARTMENT OF WATER RESOURCES, GoO,
Pictures of the site: (Dt. 30.09.2011)
Severely scoured 350 metre length of embankment is protected by sand bags
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DEPARTMENT OF WATER RESOURCES, GoO,
Pictures of the site: (Dt. 30.09.2011)
Retard Embankment built @ 60 metre on country side of Old Embankment
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DEPARTMENT OF WATER RESOURCES, GoO,
Pictures of the site: (Dt. 30.09.2011)
350 metre length of Embankment fully damaged by high surge & protected by big volume sand bags and bullah piling
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DEPARTMENT OF WATER RESOURCES, GoO,
Pictures of the site: (Dt. 20.10.2011)
400 metre length of embankment as protected earlier by sand bags are fully washed by high surge
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DEPARTMENT OF WATER RESOURCES, GoO,
Pictures of the site: (Dt. 20.10.2011)
400 metre length of embankment as protected earlier by sand bags
are fully washed by high surge
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DEPARTMENT OF WATER RESOURCES, GoO,
Pictures of the site: (Dt. 20.10.2011)
Retard embankment in front of washed zone was protected by sand bags
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DEPARTMENT OF WATER RESOURCES, GoO,
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DEPARTMENT OF WATER RESOURCES, GoO,
Pictures of the site: (Dt. 11.01.2013)
400 metre length of embankment as protected earlier by sand bags
are fully washed by high surge & retard embankment is exposed to tides
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22
In order to protect the coast line at Pentha from vulnerable erosion, Integrated Coastal Zone Management (ICZMP) & Department of Water Resources, Government of Odisha has taken up an up-to-date method of soft engineering technology which includes construction of a geo-textile tube embankment under the assistance from the World Bank.
It is a pilot project in the State of Odisha in which a structural system is to be developed to face wave action creating threat to the existing Rajnagar- Gopalpur saline embankment for long term protection.
Through a NCB Tender, the IIT( Madras) was appointed as Project Consultant. They surveyed the site and prepared the designs of the geo-textile tube embankment
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1. The work for construction of the geo-tube embankment
was awarded to M/s Garware Wall Ropes Ltd, Pune for
Rs 3295.93 Lakhs through a NCB Tender process.
2. The Contract was signed on 24.07.2013 for a construction
period of 11 months. The stipulated date of completion
being 23.06.2014. The Drawing was issued.
3. The Contractor mobilized men & machineries to site to
start the work immediately after monsoon i.e. during
October 2013
4. A very-severe cyclone Phailin occurred on 12th October
2013. The shore line at Pentha was severely eroded. The
alignment for embankment and design was to be changed
to fit in to revised site conditions
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Embankment as per original approved
drawing (30m base width) 24
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Pictures of the site: (Dt. 13.12.2013) : ( After Phailin)
Advancement of shore line encroaching the sectional area of proposed embankment as per original drawing
25
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TOPOGRAPHICAL ALIGNMENT OF REVISED
EMBANKMENT WITH L.T.L IN 2011 AND 2013
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Modification in design
Work order : 24.07 2013; Phailin Cyclone: 12.10. 2013
Temporary Cofferdam design on 13.11.2013 and construction
on 14.12.2013; Cofferdam partial damage and excavation
difficulty reported on 12.1.2014
Revising the bottom width from 30m to 24m with submitted on
12.2.2014
Revising the bottom width from 30m to 24m with movement
of crane on top of retarded embankment submitted on
2.3.2014
WRD approval of integrated retarded and geo-textile tube
embankment on 13.4.2014
15-Sep-17 ICZMP ORISSA IIT Madras
27
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24m base width Revised Design : March 2014
28
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Geo tube laying starts after preparation of bed
15-Sep-17 PUL PUSAN IIT Madras INDIA
29
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Installation of pumps on a barge to supply water for sand slurry
30
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Laying of Geo Tube
31
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Filling of Geo Tube
32
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Geo tube filling in progress
15-Sep-17 PUL PUSAN IIT Madras INDIA
33
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Geo tube filling in progress
34
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Two row sheet piles installed in cut off zone for the
most critical length of 100 mtr (RD 80 to 180 m) 35
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Sheet pile driving in progress
15-Sep-17 PUL PUSAN IIT Madras INDIA
36
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Sheet pile being installed by using vibro hammers
37
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Geotube laying completed & to be covered by gabions
38
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Geo Tubes covered by Gabions & finished sections
39
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Accretion of sand has started in front of Geo Tube
40
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GEOTEXTILE TEST PROPERTIES
15-Sep-17 ICZMP ORISSA
IIT Madras 41
SL.NO MATERIAL
PROPERTY
STANDARDS
REFERRED
As per tender
document
As per sample
tests at IIT
MADRAS
1 Weight per meter
length
ASTM D5261 241 g/m2 239.4 g/m2
2 Puncture
strength
ASTM D4833 890 N 1002.1 N
3 Trapezoidal tear
strength
ASTM D4533 Warp-1068 N Warp-1378.5 N
Weft-676 N Weft-935.3 N
4 Apparent
opening size
ASTM D4751 < 0.075 mm < 0.075 mm
5 Tensile strength IS 1969 Warp-65 KN/m Warp-63.8 KN/m
Weft-43 KN/m Weft-47.2 KN/m
6 Tensile
elongation
IS 1969 Warp-23 % Warp-22%
Weft-16 % Weft-19%
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WORK COMPLETION & REVISED COST
42 The principal reason for high cost was due to collection of river
sand with a lead of 100 km to be used in filling the geo-tubes.
The rock products were available at a lead of 120 km from the work site.
The length of the Geo tube embankment was revised and reduced from 675 mtr to 505 mtr in consideration of the extra width of beach and a part of old embankment available in front of the geotube embankment the Northen direction.
The Revised cost of the Project is Rs 3,443.52 Lakhs as against the Agreement value of Rs 3,295.93 Lakhs.
The work has been completed by the Contractor by 30. 06. 2016.
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43
Sl.
No Items of work Unit
Quantity as per
Agreement
Quantity fully
executed
(30.6. 2016)
1 Geo-Tube Nos. 234 234
2 Z-Type Sheet piling on
toe mound Sqm 1200 1200
3 9mm Rope
gabion boxes Nos 12089 11,996
4 16mm Rope gabion
boxes Nos 7285 7280
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44
Observation of performance of the
protection works at Pentha
(i) During severe cyclone Hud Hud (Oct 2014)
(ii) Accretion of sand in front of geo-tube
at present
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Damage to shore line on southern side of
Pentha side during Hud Hud on 12.10.14
15-Sep-17 PUL PUSAN IIT Madras INDIA
45
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Damage to shore line on southern side of
Pentha side during Hud Hud on 12.10.14
15-Sep-17 PUL PUSAN IIT Madras INDIA
46
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During Hud Hud the sea side slope of retard embankment as
protected by rope gabions are not affected at all
15-Sep-17 PUL PUSAN IIT Madras INDIA
47
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Accretion of sand has now started in front of Geo Tube
48
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Accretion of sand has started in front of Geo Tube
49
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Accretion of sand has started in front of Geo Tube
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DEPARTMENT OF WATER RESOURCES, GoO, PEA
Bairds & Associate, Canada-2002
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Sea-Facing Saline Embankment in Rajnagar Block
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DEPARTMENT OF WATER RESOURCES, GoO, PEA Breach occurred during Hudhud Cyclone at Satabhaya
Bairds & Associate, Canada-2002
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DEPARTMENT OF WATER RESOURCES, GoO, PEA Rajnagar-Gopalpur Saline Embankment Slope failure due to
high tide
Bairds & Associate, Canada-2002
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Bairds & Associate, Canada-2002
DEPARTMENT OF WATER RESOURCES, GoO, PEA
Rajnagar-Gopalpur Saline Embankment Slope failure due to high tide
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DEPARTMENT OF WATER RESOURCES, GoO, PEA
Bairds & Associate, Canada-2002
DEPARTMENT OF WATER RESOURCES, GoO, PEA Keradagada-Altanga Saline Embankment Slope failure due to
high tide
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THANK YOU SIR 64
Presented by :
Er. Jugal Kishore Tripathy,
Chief Construction Engineer,
Rengali Right Irrigation Project.
Department of Water Resources,
Government of Odisha.