DEPARTMENT OF WATER RESOURCES, GoO, Map of Kendrapara District - - PowerPoint PPT Presentation

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DEPARTMENT OF WATER RESOURCES, GoO, Map of Kendrapara District - - PowerPoint PPT Presentation

Nov 05, 2022 323 likes •977 views

I NTEGR EGRATE TED COAST ASTAL L ZONE NE MANAGEM EMENT ENT PROJEC OJECT ( ICZM ZMP) P) , ODISHA SHA COASTAL PROTECTION MEASURE FOR CONTROL OF COASTAL EROSION AT PENTHA IN KENDRAPARA DISTRICT, ODISHA DEPARTMENT OF WATER RESOURCES

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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 INTEGR EGRATE TED COAST ASTAL L ZONE NE MANAGEM EMENT ENT PROJEC OJECT ( ICZM ZMP) P) , ODISHA SHA

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CONTENTS

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 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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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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 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)

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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

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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

  • n 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

  • f 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

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24m base width Revised Design : March 2014

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Geo tube laying starts after preparation of bed

15-Sep-17 PUL PUSAN IIT Madras INDIA

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Installation of pumps on a barge to supply water for sand slurry

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Laying of Geo Tube

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Filling of Geo Tube

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Geo tube filling in progress

15-Sep-17 PUL PUSAN IIT Madras INDIA

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Geo tube filling in progress

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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)

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Sheet pile driving in progress

15-Sep-17 PUL PUSAN IIT Madras INDIA

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Sheet pile being installed by using vibro hammers

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Geotube laying completed & to be covered by gabions

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Geo Tubes covered by Gabions & finished sections

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Accretion of sand has started in front of Geo Tube

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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

  • pening 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

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 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

  • f 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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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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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

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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

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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

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Accretion of sand has now started in front of Geo Tube

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Accretion of sand has started in front of Geo Tube

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Accretion of sand has started in front of Geo Tube

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15-Sep-17 PUL PUSAN IIT Madras INDIA

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DEPARTMENT OF WATER RESOURCES, GoO, PEA Bairds & Associate, Canada-2002

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15-Sep-17 PUL PUSAN IIT Madras INDIA

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Sea-Facing Saline Embankment in Rajnagar Block

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15-Sep-17 PUL PUSAN IIT Madras INDIA

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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

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Presented by :

  • Er. Jugal Kishore Tripathy,

Chief Construction Engineer, Rengali Right Irrigation Project. Department of Water Resources, Government of Odisha.