Application of remote sensing and GIS in assessing coastline changes in Rach Gia city, 2000–2020
DOI:
https://doi.org/10.5281/zenodo.21072275Keywords:
Coastline change, Rach Gia, MNDWI, OTSU, DSAS, Google Earth EngineAbstract
In the context of global climate change and sea level rise, Vietnam's coastal zones face numerous challenges from shoreline erosion and accretion. This study aims to evaluate coastline changes in the coastal area of Rach Gia City (An Giang Province) using remote sensing technology based on the Google Earth Engine (GEE) platform, combined with Geographic Information System (GIS) tools, specifically the Digital Shoreline Analysis System (DSAS). The results indicate that the coastline of Rach Gia has undergone significant accretion, predominantly in areas of coastal land reclamation, accounting for approximately 88.09% of the total length of accreted shoreline. The average shoreline change rate (EPR) reaches 6–10 m/year, and the Linear Regression Rate (LRR) reaches up to 11.94 m/year. The study provides scientific basis for integrated coastal zone management and sustainable coastal urban development planning
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[1] Arjen Luijendijk, Gerben Hagenaars, Roshanka Ranasinghe, Fedor Baart, Gennadii Donchyts, and Stefan Aarninkhof, “The State of the World's Beaches”, Scientific Reports, vol. 8, p. 6641, 2018. doi: https://doi.org/10.1038/s41598-018-24630-6
[2] Edward J. Anthony, Guillaume Brunier, Manon Besset, Marc Goichot, Philippe Dussouillez, and Van Lap Nguyen, “Linking rapid erosion of the Mekong River delta to human activities”, Scientific Reports, vol. 5, p. 14745, 2015. doi: 10.1038/srep14745
[3] Toru Tamura et al., “Long-term sediment decline causes ongoing shrinkage of the Mekong megadelta, Vietnam”, Scientific Reports, vol. 10, p. 8085, 2020. doi: https://doi.org/10.1038/s41598-020-64630-z
[4] Patrick Marchesiello et al., “Erosion of the coastal Mekong delta: Assessing natural against man induced processes”, Continental Shelf Research, vol. 181, pp. 72–89, 2019. doi: https://doi.org/10.1016/j.csr.2019.05.004
[5] VnExpress, “Vietnam needs urgent guidelines for land reclamation from the sea”, VnExpress International, 2024. Accessed: Apr. 2, 2026. Available: https://e.vnexpress.net/news/perspectives/land-reclamation-needs-centralized-plan-4700993.html
[6] Thanh Phong Nguyen, Thanh Toan Luom, and Kevin E. Parnell, “Mangrove allocation for coastal protection and livelihood improvement in Kien Giang province, Vietnam: Constraints and recommendations”, Land Use Policy, vol. 63, pp. 401–410, 2017. doi: https://doi.org/10.1016/j.landusepol.2017.01.048
[7] Noel Gorelick, Matt Hancher, Mike Dixon, Simon Ilyushchenko, David Thau, and Rebecca Moore, “Google Earth Engine: Planetary-scale geospatial analysis for everyone”, Remote Sensing of Environment, vol. 202, pp. 18–27, 2017. doi: 10.1016/j.rse.2017.06.031
[8] Karim Nassar, Wael E. Mahmod, Hussein Fath, Ahmed Masria, Kazuo Nadaoka, and Abdelazim Negm, “Shoreline change detection using DSAS technique: Case of North Sinai coast, Egypt”, Marine Georesources & Geotechnology, vol. 37, no. 1, pp. 81–95, 2018.
[9] Widyatmanti Arief and Wahyu Pramaditya, “Geometric Accuracy Assessment for Shoreline Derived from NDWI, MNDWI, and AWEI Transformation on Various Coastal Physical Typology in Jepara Regency using Landsat 8 OLI Imagery in 2018”, Geoplanning: Journal of Geomatics and Planning, vol. 6, no. 1, pp. 55–72, 2022.
[10] Pham Thi Huong, Nguyen Chi Kim, and Do Viet Uu, “Investigation of Shoreline Changes in the Coast of Haiphong Province from 1987 to 2018”, VNU Journal of Science: Earth and Environmental Sciences, vol. 37, no. 4, pp. 33–42, 2021.
[11] Mạc Quốc Khoát, Mạc Văn Công, and Phạm Ngọc Quy, “Phân tích biến động của đường bờ đảo Phú Quý sử dụng ảnh viễn thám trên nền Google Earth Engine và phần mềm DSAS”, Tạp chí Khoa học Kỹ thuật Thủy lợi và Môi trường, số 73, trang 92–99, 2021.
[12] Kilian Vos, Kristen D. Splinter, Mitchell D. Harley, Joshua A. Simmons, and Ian L. Turner, “CoastSat: A Google Earth Engine-enabled Python toolkit to extract shorelines from publicly available satellite imagery”, Environmental Modelling & Software, vol. 122, p. 104528, 2019. doi: https://doi.org/10.1016/j.envsoft.2019.104528
[13] Wahyu Rahma Astuti and Erycson Nathanael Arrofiqoh, “Mapping Shoreline Changes Using Digital Shoreline Analysis System in Coastal Areas of Bantul and Kulon Progo Regencies”, Journal of Geospatial Science and Technology, vol. 2, no. 2, pp. 35–44, 2024.
[14] Wenjing Tang et al., “Improved Spectral Water Index Combined with Otsu Algorithm to Extract Muddy Coastline Data”, Water, vol. 14, no. 6, pp. 855–870, 2022.
[15] Thanh Liem Nguyen, Nguyen Thi Huong Diep, and Nguyen Thi Can, “Monitoring Erosion and Accretion Situation in the Coastal Zone at Kien Giang Province”, The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, vol. XLII-3/W4, pp. 197–201, 2018.
[16] Nguyen Thanh Phong, Kevin E. Parnell, and Andrew Cottrell, “Human activities and coastal erosion on the Kien Giang coast, Vietnam”, Journal of Coastal Conservation, vol. 21, pp. 967–979, 2017. doi: https://doi.org/10.1007/s11852-017-0566-9
[17] Nguyen Huu Hoa, Clive McAlpine, David Pullar, Stephen J. Leisz, and Grigoriy Gramotnev, “Drivers of coastal shoreline change: case study of the Hon Dat coast, Kien Giang, Vietnam”, Environmental Management, vol. 55, pp. 1093–1108, 2015. doi: https://doi.org/10.1007/s00267-015-0455-7
[18] Cao Van Cuong, Stuart Brown, Ho Huu To, and Marc Hockings, “Using Shoreline Video Assessment for coastal planning and restoration in the context of climate change in Kien Giang, Vietnam”, Ocean Science Journal, vol. 50, pp. 413–426, 2015. doi: https://doi.org/10.1007/s12601-015-0038-9
[19] Hanqiu Xu, “Modification of Normalised Difference Water Index (NDWI) to Enhance Open Water Features in Remotely Sensed Imagery”, International Journal of Remote Sensing, vol. 27, pp. 3025–3033, 2006. doi: https://doi.org/10.1080/01431160600589179
[20] Nobuyuki Otsu, “A threshold selection method from gray-level histograms”, IEEE Transactions on Systems, Man, and Cybernetics, vol. 9, pp. 62–66, 1979. doi: https://doi.org/10.1109/tsmc.1979.4310076
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