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Numerical modelling approach for the feasibility of shore protection measures along the coast of Kavaratti Island, Lakshadweep archipelago


Erosion along Kavaratti Island has intensified in recent times due to infrastructure development and natural phenomenon. Numerical models were used to identify suitable foreshore protection structures, considering the near-shore coastal processes. For this purpose, shoreline change around the island was obtained from field surveys and results of the DSAS model. Subsequently, model simulations were conducted for the most appropriate use of structural protection measure to understand the change in hydrodynamics and sediment transport, which would ultimately result in stabilization of the Kavaratti Island coast. Based on the prevailing conditions, suitable site-specific coastal protection structures (e.g., groynes, revetment, breakwater, submerged geo-tubes structures and submerged breakwater) were assessed to determine the most feasible and suitable shore protection measure and observed the following: (a) Revetment and submerged geo-tube structure to be the most effective protection measures on the eastern part of the Kavaratti Island, (b) significant decrease in current speed from 0.48 to 0.05 m/s, and (c) significant decrease in wave height (from 2.5 to 0.3 m) and wave energy reduction about 50% from the prevailing conditions were observed. With this intervention, the existing shoreline of the island would at least be maintained, possibly preventing any further loss of land.

Research Highlights

  1. 1.

    Net erosion rate is − 1.2 m/yr and it shows − 1.36 m/yr in the lagoon side and − 2.35 m/yr in the eastern side.

  2. 2.

    Erosion hotspots are identified along the east and west coast. Highest erosion rate of − 4.23 m/yr was estimated in the eastern side of the island and on the southwest side of the chicken neck area (− 2.94 m/yr).

  3. 3.

    Assessment for shoreline change predictions was carried out using Gencade model during 2018–2028.

  4. 4.

    Revetment and submerged geo-tube breakwater are to be the most effective and feasible foreshore protection structure.

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(source: IIMP Report, NCSCM, 2015). (be) Existing foreshore protection measures along the east coast of Kavaratti Island.

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  • Banton J, Warner P, Smith D and Morin V 2015 Selection of appropriate coastal protection strategies for Caribbean Coastlines; In: Coastal Structures and Solutions to Coastal Disasters, pp. 570–581,

  • Borgudd J 2014 Reducing risk for erosion in Maldives–Comparative case study of local people’s and resort’s adaptive capacity in Laamu atoll; Thesis, Lund University,

  • Chrysanti A, Adityawan M B, Widyaningtyas, Yakti B P, Nugroho J, Zain K, Haryanto I, Sulaiman M, Kurniawan A and Tanaka H 2019 Prediction of shoreline change using a numerical model: Case of the Kulon Progo Coast, Central Java; MATEC Web of Conferences 270,

  • Choi K H, Kim J S and Lee J C 2016 Migration of coastal erosional hotspots due to coastal protection structures; J. Coast. Res. Spec. Issue 75 1062–1066,

    Article  Google Scholar 

  • Cooper J A G and McKenna J 2008 Social justice in coastal erosion management: The temporal and spatial dimensions; Geoforum 39 294–306,

    Article  Google Scholar 

  • Elliott M 2018 Bio-structural erosion control: Incorporating vegetation into engineering designs to protect puget sound shorelines; Greenbelt Consulting,

  • Escudero M, Silva R and Mendoza E 2014 Beach erosion driven by natural and human activity at Isla del Carmen Barrier Island, Mexico; J. Coast. Res. 71 62–74,

    Article  Google Scholar 

  • Frey A E, Connell K J, Hanson H and Largon M 2012a GenCade Version 1 Model Theory and User's guide; US Army Corps of Engineers, ERDC/CHL TR-12-25 187.

  • Frey A E, Rosati J I, Connell K J, Hanson H and Larson M 2012b Modeling alternatives for erosion control at Matagorda County, Texas, with GenCade; Coast. Eng. 33 114,

    Article  Google Scholar 

  • Guillén J, Palanques A, Puig P, Durrieu-De-Madron X and Nyffeler F 2007 Field calibration of optical sensors for measuring suspended sediment concentration in the western Mediterranean; Sci. Mar. 64(4) 427–435,

    Article  Google Scholar 

  • Hanson H and Kraus N C 1989 GENESIS: Generalized model for simulating shoreline change, Report 1: Technical Reference, CERC-89-19, U.S. Army Engineer Waterways Experiment Station, Vicksburg,

  • Hendriyono W, Mardi W, Buddin A H and Dinar C I 2015 Modeling of sediment transport affecting the coastline changes due to infrastructures in Batang–Central Java; Proc. Earth Planet. Sci. 14 166–178,

    Article  Google Scholar 

  • Integrated Island Management Plan (IIMP) 2015 National Center for Sustainable Coastal Management (NCSCM), Ministry of Environment, Forest and Climate Change, Govt. of India (unpublished data).

  • Jinoj T P S, Bonthu S R, Robin R, Idrees B K K, Purvaja R and Ramesh R 2020 Nearshore sediment dynamics of Kavaratti Island, Lakshadweep archipelago using integrated modelling system; Indian J. Geo-Mar. Sci. 49(5) 845–857,

    Google Scholar 

  • Kench P, Parnell K and Brander R 2003 A process-based assessment of engineered structures on reef islands of the Maldives; In: Proceedings of the Joint 16th Australasian Coastal and Ocean Engineering Conference,

  • Kiran A S, Vijaya R, Kumar A and Aruna 2014 Design of an environmental friendly shore protection measure for Kadalur Periyakuppam, Tamil Nadu using hydrodynamic model studies; Indian J. Geo-Mar. Sci. 43(7) 1306–1310.

    Google Scholar 

  • Kudale M 2010 Impact of port development on the coastline and the need for protection; Indian J. Geo-Mar. Sci. 39 597–604.

    Google Scholar 

  • Larson M, Kraus N C and Connell K J 2006 Cascade version 1: Theory and model formulation. ERDC TN-SWWRP-06-7; Vicksburg, MS: U.S. Army Engineer Research and Development Center,

  • Larson M, Kraus N C and Hanson H 2003 Simulation of regional longshore sediment transport and coastal evolution–The Cascade model; Proc. 28th Coastal Engineering Conference, World Scientific Press, pp. 2612–2624,

  • Lee M T and Lin T F 2014 Developing an interactive decision support system for sustainable coastal tourism of Cijin, Taiwan; Int. Sym. Com. Con. Cont. Taichung, pp. 682–685,

  • Masria A, Iskander M M and Negm A 2015 Coastal protection measures, case study (Mediterranean zone, Egypt); J. Coast. Conserv. 19 281–294,

    Article  Google Scholar 

  • Masselink G, Beetham E and Kench P 2020 Coral reef islands can accrete vertically in response to sea level rise; Sci. Adv. 6 24,

    Article  Google Scholar 

  • Mohanty P K, Barik S K, Kar P, Behera B and Mishra P 2015 Impacts of ports on shoreline change along Odisha Coast; Procedia Eng. 116 647–654,

  • Palalane J 2016 Processes of long-term coastal evolution and their mathematical modelling: Application to the Mozambican coast; Division of Water Resources Engineering, Department of Building and Environmental Technology, Lund University,

  • Pilarczyk K and Zeidler R B 1996 Offshore breakwaters and shore evolution control; A.A. Balkema, Rotterdam.

  • Pradjoko E, Bachtiar I, Matalatta N and Sugihartono G 2015 The submerged breakwater as prototype of coastal protection in Gili Trawangan, Lombok, Indonesia; Procedia Eng. 125 284–290,

    Article  Google Scholar 

  • Prakash T N, Nair L S and Varghese T I 2014 Shoreline changes and reef strengthening at Kavaratti Island in Lakshadweep archipelago – a case study; Indian J. Geo-Mar. Sci. 43(7) 1140–1144.

    Google Scholar 

  • Prakash T N, Nair L S and Varghese T I 2015 Geomorphology and physical oceanography of the Lakshadweep Coral Islands in the Indian Ocean; Springer Briefs in Earth Sci.,

    Article  Google Scholar 

  • Ramana Murthy M V, Ravichandran V, Vendhan M, Kiran A S, Raju S K, Aruna Kumar A, Shyamala V and Abhishek T 2020 Shore protection measures along Indian Coast – Design to implementation based on two case studies; Curr. Sci. 118(11) 1768–1773.

    Google Scholar 

  • Roger H C, Chaineux M C P and Morcos S 2005 Panorama of the history of coastal protection; J. Coast. Res. 21(1) 79–111,

    Article  Google Scholar 

  • Shin E C, Kang J K and Kim S H 2016 Construction technology of environmental sustainable shore and harbour structures using stacked geotextile tube; KSCE; J. Civ. Eng. 20 2095–2102,

    Article  Google Scholar 

  • Sivakholundu K M, Vijaya R, Kiran A S and Abhishek 2014 Short term morphological evolution of sandy beach and possible mitigation: A case study off Kadalur Periyakuppam; Indian J. Geo-Mar. Sci. 43(7) 1297–1305,

    Google Scholar 

  • Suganya G M D, Deepika B, Madhumitha R, Rajakumari S, Purvaja R and Ramesh R 2019 Planform Island change assessment for inhabited Lakshadweep Islands; Nat. Hazards 98 735–750,

    Article  Google Scholar 

  • Sundar V and Sannasiraj S A 2016 Shore protection for the coast of Mousuni Island in West Bengal, India; Int. J. Ocean Clim. Syst. 7(2) 35–46,

    Article  Google Scholar 

  • Survey of Climate Change Adaptation Measures in Maldives 2011 Integration of Climate Change Risks into Resilient Island Planning in the Maldives Project; Ministry of Housing and Environment, Maldives.

  • Tomasicchio G R, Francone A, Simmonds D J, D’Alessandro F and Frega F 2020 Prediction of shoreline evolution. Reliability of a general model for the mixed beach case; J. Mar. Sci. Eng. 8(5) 361,

  • Yang R Y, Wu Y C and Hwung H H 2012 Beach erosion management with the application of soft countermeasure in Taiwan; In: Sustainable Development–Authoritative and Leading-Edge Content for Environmental Management; Inteck, pp. 349–370,

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This study was undertaken as part of in-house research ‘Sentinel Site’ (# IR12005) of the National Centre for Sustainable Coastal Management (NCSCM), Ministry of Environment, Forest and Climate Change (MoEF&CC), Government of India. The authors acknowledge the financial support of the MoEF&CC under the World Bank aided India-ICZM Project (Rel. Proj. ID: India-Integrated Coastal Zone Management-P097985). Authors are grateful to Mary Divya Suganya G, Deepika B and Madhumitha R, Scientists, NCSCM for their valuable support during this study. The authors would like to sincerely thank the Lakshadweep Administration and Department of Science and Technology, Kavaratti for providing support during the field survey. This is NCSCM contribution number NCSCM/PUB/2021/0001.

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Authors and Affiliations



Pearlin Sam Jinoj T: Data curation, formal analysis, original draft. Subbareddy Bonthu: Conceptualization, data curation, original draft, review and editing. Robin R S: Data curation, review and editing. Idrees Babu K K: Data curation, review and editing. Arumugam K: Formal analysis. R Purvaja: Conceptualization, review and editing. R Ramesh: Project administration, review and editing.

Corresponding author

Correspondence to R Ramesh.

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Communicated by C Gnanaseelan

This article is part of the Topical Collection: Advances in Coastal Research.

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Jinoj, T.P.S., Bonthu, S., Robin, R.S. et al. Numerical modelling approach for the feasibility of shore protection measures along the coast of Kavaratti Island, Lakshadweep archipelago. J Earth Syst Sci 130, 165 (2021).

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