Abstract
The natural and man-induced processes increase the littoral instability of the Small Island Developing States, such as the Ngazidja Island, Comoros, West Indian Ocean. The shoreline position is retrograding and reduces habitable areas. This study uses Landsat TM1990 and OLI2020, band ratio technique, End Point Rate (EPR) method through Digital Shoreline Analysis System (DSAS). Calibration of the shoreline changes is conducted through field work and the coastal state indicators. About 21 km of shore segments have been classified, according to the EPR values, into erosion, low stability, high stability, and accretion areas. From 1990 to 2020, the results show accurate shoreline change rates with a margin of error of + / − 0.07 m/year. Four shores, Mbachile, Chindini, Hantsindzi, and Ndroude, are under erosion with EPR values of more than − 1 m/year. Low stability is noticed on five shores, Foumboudzivouni, Male, Moindzaza-Amboini, Ikoni, and Bangoi-kouni, which more than 80% of transects display EPR values of − 1 to 0 m/year. High stability was only found on Mitsamiouli shore, where 51%, 40%, and 9% of transects show EPR values of − 1 to 0 m/year, 0.1 to 1 m/year, and more than 1 m/year, respectively. It is found that marches and coastal greening mitigate the shoreline retreat and enhance coastal stability. By contrast, poorly designed or improperly installed seawalls and sand mining exacerbate coastal erosion.
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References
Airoldi L, Abbiati M, Beck MW, Hawkins SJ, Jonsson PR, Martin D, Moschella PS, Sundelöf A, Thompson RC, Åberg P (2005) An ecological perspective on the deployment and design of low-crested and other hard coastal defence structures. Coast Eng 52:1073–1087. https://doi.org/10.1016/j.coastaleng.2005.09.007
Alemayehu F, Onwonga R, Mwangi JK, Wasonga OV (2015) Assessment of shoreline changes in the period 1969–2010 in Watamuarea, Kenya. http://erepository.uonbi.ac.ke/handle/11295/85641
Al-Hatrushi SM (2013) Monitoring of the shoreline change using remote sensing and GIS: a case study of Al Hawasnah Tidal Inlet, Al Batinah Coast, Sultanate of Oman. Arab J Geosci 6:1479–1484. https://doi.org/10.1007/s12517-011-0424-2
Bachèlery P, Coudray J (1993) Carte volcano-tectonique de la Grande Comore (1:50,000). Laboratoire de cartographie, Montpellier: CIRAD-CA. https://agritrop.cirad.fr/483016/
Bachèlery P, Morin J, Villeneuve N, Soulé H, Nassor H, Ali AR (2016) Structure and eruptive history of Karthala volcano. In Active volcanoes of the southwest Indian Ocean. Springer, Berlin, Heidelberg pp 345-366
Baig MRI, Ahmad IA, Shahfahad TM, Rahman A (2020) Analysis of shoreline changes in Vishakhapatnam coastal tract of Andhra Pradesh, India: an application of digital shoreline analysis system (dsas). Ann GIS 26(4):361–376
Betzold C, Mohamed I (2017) Seawalls as a response to coastal erosion and flooding: a case study from Grande Comore, Comoros (West Indian Ocean). Reg Environ Changement 17:1077–1087
Bheeroo RA, Chandrasekar N, Kaliraj S, Magesh NS (2016) Shoreline change rate and erosion risk assessment along the Trou Aux Biches-Mont Choisy Beach on the Northwest Coast of Mauritius using GIS-DSAS technique. Environ Earth Sci 75:444
Bird E (2016) Introduction. Coastal Cliffs: morphology and management. Springer, Cham, pp 1–4. https://doi.org/10.1007/978-3-319-29084-3_1
Boak EH, Turner IL (2005) Shoreline definition and detection: a review. J Coast Res 21:688–703. https://doi.org/10.2112/03-0071.1
Boateng I (2012) An application of GIS and coastal geomorphology for large scale assessment of coastal erosion and management: a case study of Ghana. J Coast Conserv 16:383–397. https://doi.org/10.1007/s11852-012-0209-0
Chavez PS (1996) Image-based atmospheric corrections-revisited and improved. Photogramm Eng Remote Sens 62:1025–1035
Cho DO (2006) Challenges to sustainable development of marine sand in Korea. Ocean Coast Manag 49:1–21. https://doi.org/10.1016/j.ocecoaman.2005.10.001
Cournil C, Gemenne F (2010) Les populations insulaires face au changement climatique: Des migrations à anticiper. [VertigO] La Revue Électronique En Sciences de l’environnement 10:0–0
Cowburn B, Samoilys MA, Obura D (2018) The current status of coral reefs and their vulnerability to climate change and multiple human stresses in the Comoros Archipelago, Western Indian Ocean. Mar Pollut Bull 133:956–969. https://doi.org/10.1016/j.marpolbul.2018.04.065
Cui BL, Li XY (2011) Coastline change of the Yellow River Estuary and its response to the sediment and runoff (1976–2005). Geomorphology 127:32–40
Daoudi M, Niang AJ (2021) Detection of shoreline changes along the coast of Jeddah and its impact on the geomorphological system using GIS techniques and remote sensing data (1951–2018). Arab J Geosci 14:1265. https://doi.org/10.1007/s12517-021-07605-2
Dereli MA, Tercan E (2020) Assessment of shoreline changes using historical satellite images and geospatial analysis along the Lake Salda in Turkey. Earth Sci Inform 13:709–718
Dewi RS, Bijker W (2020) Dynamics of shoreline changes in the coastal region of Sayung, Indonesia. Egypt J Remote Sens Space Sci 23:181–193. https://doi.org/10.1016/j.ejrs.2019.09.001
Duvat V, Magnan A (2011) Des archipels en péril? Les Maldives et les Kiribati face au changement climatique”. VertigO-La Revue Électronique En Sciences de l’environnement 10:0–0
Duvat VKE, Magnan AK, Etienne S, Salmon C, Pignon-Mussaud C (2016) Assessing the impacts of and resilience to Tropical Cyclone Bejisa, Reunion Island (Indian Ocean). Nat Hazards 83:601–640. https://doi.org/10.1007/s11069-016-2338-5
Duvat VKE, Volto N, Salmon C (2017) Impacts of category 5 tropical cyclone Fantala (April 2016) on Farquhar Atoll, Seychelles Islands, Indian Ocean. Geomorphology 298:41–62. https://doi.org/10.1016/j.geomorph.2017.09.022
Duvat VKE, Anisimov A, Magnan AK (2020) Assessment of coastal risk reduction and adaptation-labelled responses in Mauritius Island (Indian Ocean). Reg Environ Changement 20:110. https://doi.org/10.1007/s10113-020-01699-2
Esmail M, Mahmod WE, Fath H (2019) Assessment and prediction of shoreline change using multi-temporal satellite images and statistics: case study of Damietta Coast, Egypt. Appl Ocean Res 82:274–282. https://doi.org/10.1016/j.apor.2018.11.009
Freed S, Granek EF (2014) Effects of human activities on the World’s most vulnerable coral reefs: Comoros case study. Coast Manage 42:280–296. https://doi.org/10.1080/08920753.2014.904261
Gibbs AE, Ohman KA, Richmond BM (2015) National assessment of shoreline change—a GIS compilation of vector shorelines and associated shoreline change data for the North Coast of Alaska, U.S.-Canadian Border to Icy Cape. Open-file report 2015–1030. https://doi.org/10.3133/ofr20151030
Gokceoglu C, Nefeslioglu HA, Turer D, Akgun A, Ayas Z, Temimhan M (2015) Determination of coastal border line: an integrated approach for a part of Antalya Coast (Turkey). Arab J Geosci 8:1145–1154. https://doi.org/10.1007/s12517-014-1287-0
Gouveia Souza CR, Suguio K (2003) The coastal erosion risk zoning and the São Paulo State Plan for Coastal Management. J Coast Res 530–547. https://www.jstor.org/stable/40928805
Gracia A, Rangel-Buitrago N, Oakley JA, Williams AT (2018) Use of ecosystems in coastal erosion management. Ocean Coast Manag 156:277–289. https://doi.org/10.1016/j.ocecoaman.2017.07.009
Hanslow DJ (2007) Beach erosion trend measurement: a comparison of trend indicators. J Coast Res 588–593. https://www.jstor.org/stable/26481655
Hassan A, Hassaan MA (2020) Potential impact of sea level rise on the geomorphology of Kuwait State Coastline. Arab J Geosci 13:1139. https://doi.org/10.1007/s12517-020-06084-1
Hauzer M, Dearden P, Murray G (2013) The fisherwomen of Ngazidja Island, Comoros: fisheries livelihoods, impacts, and implications for management. Fish Res 140:28–35. https://doi.org/10.1016/j.fishres.2012.12.001
Immanuvel David T, Mukesh MV, Kumaravel S, Sabeen HM (2016) Long-and short-term variations in shore morphology of Van Island in Gulf of Mannar using Remote Sensing images and DSAS analysis. Arab J Geosci 9:756. https://doi.org/10.1007/s12517-016-2772-4
Jackson DWT, Costas S, González-Villanueva R, Cooper A (2019) A global ‘greening’ of coastal dunes: an integrated consequence of climate change? Glob Planet Change 182:103026. https://doi.org/10.1016/j.gloplacha.2019.103026
John SE, Rajimol TR, Mohan SV, Maya K, Padmalal D (2017) Environmental degradation of a tropical estuary due to human interferences—a case study from southern Kerala, SW India. Arab J Geosci 10:352. https://doi.org/10.1007/s12517-017-3112-z
Kar PK, Mohanty PK, Pradhan S, Behera B, Padhi SK, Mishra P (2021) Shoreline change along Odisha Coast using statistical and geo-spatial techniques. J Earth Syst Sci 130:209. https://doi.org/10.1007/s12040-021-01703-1
Komolafe AA, Apalara PA, Ibitoye MO, Adebola AO, Olorunfemi IE, Diallo I (2021) Spatio-temporal analysis of shoreline positional change of Ondo State coastline using remote sensing and GIS: a case study of Ilaje Coastline at Ondo State in Nigeria. Earth Syst Environ. https://doi.org/10.1007/s41748-021-00270-1
Kwarteng AY, Al-Hatrushi SM, Illenberger WK, McLachlan A, Sana A, Al-Buloushi AS, Hamed KH (2016) Beach erosion along Al Batinah Coast, Sultanate of Oman. Arab J Geosci 9:85. https://doi.org/10.1007/s12517-015-2186-8
López Royo M, Ranasinghe R, Jiménez JA (2016) A rapid, low-cost approach to coastal vulnerability assessment at a national level. J Coast Res 32:932–945. https://doi.org/10.2112/JCOASTRES-D-14-00217.1
Louati M, Saïdi H, Zargouni F (2015) Shoreline change assessment using Remote Sensing and GIS techniques: a case study of the Medjerda Delta Coast, Tunisia. Arab J Geosci 8:4239–4255. https://doi.org/10.1007/s12517-014-1472-1
Mahabot M, Pennober G (2015) Rapport Final POCTOI UMR ESPACE DEV 20–30 Septembre 2014. p 33
Mahongo S, Shaghude Y (2013) Investigating the effect of winds and storms on shoreline erosion along the Coast of Tanzania. J Shipping and Ocean Eng 3:6
Martínez ML, Intralawan A, Vázquez G, Pérez-Maqueo O, Sutton P, Landgrave R (2007) The coasts of our world: ecological, economic and social importance. Ecol Econ Ecological Economics of Coastal Disasters 63:254–272. https://doi.org/10.1016/j.ecolecon.2006.10.022
Masalu DC (2002) Coastal erosion and its social and environmental aspects in Tanzania: a case study in illegal sand mining. Coast Manage 30:347-359
Masson-Delmotte V, Zhai P, Pirani A, Connors SL, Péan C, Berger S, Caud N, et al. eds. (2021) Climate Change 2021: the physical science basis. Contribution of working group I to the Sixth Assessment Report of the Intergovernmental Panel on Climate Change. Cambridge University Press
Matin N, Hasan GMJ (2021) A quantitative analysis of shoreline changes along the coast of Bangladesh using remote sensing and GIS techniques. CATENA 201:105185. https://doi.org/10.1016/j.catena.2021.105185
McMichael C, Dasgupta S, Ayeb-Karlsson S, Kelman I (2020) A review of estimating population exposure to sea-level rise and the relevance for migration. Environ Res Lett 15:12005
Michon L (2016) The volcanism of the Comoros Archipelago integrated at a regional scale. Active Volcanoes of the Southwest Indian Ocean. Springer, Berlin, Heidelberg, pp 333–344
Miles JR, Russell PE, Huntley DA (2001) Field measurements of sediment dynamics in front of a seawall. J Coast Res 195–206
Mitri G, Nader M, Dagher MA, Gebrael K (2020) Investigating the performance of Sentinel-2A and Landsat 8 imagery in mapping shoreline changes. J Coast Conserv 24:40. https://doi.org/10.1007/s11852-020-00758-4
Mondal B, Saha AK, Roy A (2021) Shoreline extraction and change estimation using geospatial techniques: a study of coastal West Bengal, India. Proc Indian Natl Sci Acad 87:595–612. https://doi.org/10.1007/s43538-021-00059-w
Mujabar PS, Chandrasekar N (2013) Shoreline change analysis along the coast between Kanyakumari and Tuticorin of India using remote sensing and GIS. Arab J Geosci 6:647–664. https://doi.org/10.1007/s12517-011-0394-4
Newton A, Weichselgartner J (2014) Hotspots of coastal vulnerability: a DPSIR analysis to find societal pathways and responses. Estuar Coast Shelf Sci 140:123–133
Pescatore T, Senatore MR, Capretto G, Lerro G (2001) Holocene coastal environments near Pompeii before the A.D. 79 eruption of Mount Vesuvius, Italy. Quat Res 55:77–85. https://doi.org/10.1006/qres.2000.2186
Proosdij D, Matheson G, Ross C (2018) Influence of dykeland engineering and management strategies on the intertidal ecomorphodynamics of a fetch-limited, temperate, hypertidal estuary. AGU Fall Meeting Abstracts 13. http://adsabs.harvard.edu/abs/2018AGUFMEP13A..08V
Psuty NP, Silveira TM (2010) Global climate change: an opportunity for coastal dunes?? J Coast Conserv 14:153–160
Ratter BMW, Petzold J, Sinane K (2016) Considering the locals: coastal construction and destruction in times of Climate Change on Anjouan, Comoros. Nat Res Forum 40:112–126. https://doi.org/10.1111/1477-8947.12102
Rochayati N, Ibrahim M, Herianto A, Johari HI (2020) Community understanding and attitude levels on the implementation of illegal sand mining on the Induk Beach, West Lombok. IOP Conf Ser: Earth Environ Sci 413:012035. https://doi.org/10.1088/1755-1315/413/1/012035
Ružić I, Jovančević SD, Benac Č, Krvavica N (2019) Assessment of the coastal vulnerability index in an area of complex geological conditions on the Krk Island, Northeast Adriatic Sea. Geosciences 9:219. https://doi.org/10.3390/geosciences9050219
Sardá R, Valls JF, Pintó J, Ariza E, Lozoya JP, Fraguell RM, Martí C, Rucabado J, Ramis J, Jimenez JA (2015) Towards a new integrated beach management system: the ecosystem-based management system for beaches. Ocean Coast Manag 118:167–177. https://doi.org/10.1016/j.ocecoaman.2015.07.020
Selvan SC, Kankara RS, Prabhu K, Rajan B (2020) Shoreline change along Kerala, south-west coast of India, using geo-spatial techniques and field measurement. Nat Hazards 100:17–38. https://doi.org/10.1007/s11069-019-03790-2
Shepard CC, Crain CM, Beck MW (2011) The protective role of coastal marshes: a systematic review and meta-analysis. Plos One 6:e27374. https://doi.org/10.1371/journal.pone.0027374
Silva JCB, New AL, Magalhaes JM (2009) Internal solitary waves in the Mozambique Channel: observations and interpretation. J Geophys Res: Oceans 114(C5). https://doi.org/10.1029/2008JC005125
Sinane K, David G, Pennober G, Troadec R (2011) Fragilisation et modification des formations littorales meubles sur l’île d’Anjouan (Comores): Quand l’érosion d’origine anthropique se conjugue au Changement Climatique. VertigO-La Revue Électronique En Sciences de l’environnement 10:0–0
Small C, Nicholls RJ (2003) A global analysis of human settlement in coastal zones. J Coast Res 19:584–599
Smith KEL, Terrano JF, Pitchford JL, Archer MJ (2021) Coastal wetland shoreline change monitoring: a comparison of shorelines from high-resolution worldview satellite imagery, aerial imagery, and field surveys. Remote Sens 13:3030. https://doi.org/10.3390/rs13153030
Testut L, Duvat V, Ballu V, Fernandes RMS, Pouget F, Salmon C, Dyment J (2016) Shoreline changes in a rising sea level context: the example of Grande Glorieuse, Scattered Islands, Western Indian Ocean. Acta Oecologica, Îles Éparses (French Scattered Islands, SW Indian Ocean) as reference ecosystems for environmental research 72:110–19. https://doi.org/10.1016/j.actao.2015.10.002.
Thakur S, Mondal I, Bar S, Nandi S, Ghosh PB, Das P, De TK (2021) Shoreline changes and its impact on the mangrove ecosystems of some islands of Indian Sundarbans, north-east coast of India. J Clean Prod 284:124764. https://doi.org/10.1016/j.jclepro.2020.124764
Thieler ER, Hammar-Klose ES (2000) National assessment of coastal vulnerability to sea level rise: preliminary results for the US. Pacific Coast, Open-file r 00–178, 1 sheet. US Geological Survey
Thornton EB, Sallenger A, Sesto JC, Egley L, McGee T, Parsons R (2006) Sand mining impacts on long-term dune erosion in southern Monterey Bay. Mar Geol 229:45–58. https://doi.org/10.1016/j.margeo.2006.02.005
Velsamy S, Balasubramaniyan G, Swaminathan B, Kesavan D (2020) Multi-decadal shoreline change analysis in Coast of Thiruchendur Taluk, Thoothukudi District, Tamil Nadu, India, using Remote Sensing and DSAS techniques. Arab J Geosci 13:838. https://doi.org/10.1007/s12517-020-05800-1
Wright KA, Davies RJ, Jerram DA, Morris J, Fletcher R (2012) Application of seismic and sequence stratigraphic concepts to a lava-fed delta system in the Faroe-Shetland Basin, UK and Faroes. Basin Res 24:91–106. https://doi.org/10.1111/j.1365-2117.2011.00513.x
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Mahamoud, A., Maher, G., Mohamed, N.A. et al. Monitoring shoreline change using remote sensing, GIS, and field surveys: a case study of the Ngazidja Island Coast, Comoros. Arab J Geosci 16, 114 (2023). https://doi.org/10.1007/s12517-023-11200-y
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DOI: https://doi.org/10.1007/s12517-023-11200-y