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Using RS and GIS Techniques to Assess and Monitor Coastal Changes of Coastal Islands in the Marine Environment of a Humid Tropical Region
Department of Climate Variability and Aquatic Ecosystems, Kerala University of Fisheries and Ocean Studies (KUFOS), Kochi 682508, India.
Department of Climate Variability and Aquatic Ecosystems, Kerala University of Fisheries and Ocean Studies (KUFOS), Kochi 682508, India.
Centre for Water Resources Development and Management (CWRDM), Kozhikode 673571, India.
Centre for Water Resources Development and Management (CWRDM), Kozhikode 673571, India.
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2023 (English)In: Water, E-ISSN 2073-4441, Vol. 15, no 21, article id 3819Article in journal (Refereed) Published
Abstract [en]

Vypin, Vallarpadam, and Bolgatty are significant tropical coastal islands situated in the humid tropical Kerala region of India, notable for their environmental sensitivity. This study conducted a comprehensive assessment of shoreline alterations on these islands by integrating Remote Sensing (RS) and Geographic Information Systems (GIS) techniques. Utilizing satellite imagery from the LANDSAT series with a spatial resolution of 30 m, the analysis spanned the years from 1973 to 2019. The Digital Shoreline Analysis System (DSAS) tool, integrated into the ArcGIS software, was employed to monitor and analyze shoreline shifts, encompassing erosion and accretion. Various statistical parameters, including Net Shoreline Movement (NSM), End Point Rate (EPR), and Linear Regression Rate (LRR), were utilized to evaluate these changes. Additionally, the study aimed to discern the root causes of shoreline modifications in the study area, encompassing disturbances and the construction of new structures on these islands. The results conclusively demonstrated the substantial impact endured by these coastal islands, with accretion on both sides leading to the creation of new landmasses. This manuscript effectively illustrates that these islands have experienced marine transgression, notably evidenced by accretion. Anthropogenic activities were identified as the primary drivers behind the observed shoreline changes, underscoring the need for careful management and sustainable practices in these fragile coastal ecosystems.

Place, publisher, year, edition, pages
MDPI, 2023. Vol. 15, no 21, article id 3819
Keywords [en]
accretion, coastal islands, end point rate (EPR), erosion, linear regression rate (LRR), net shoreline movement (NSM)
National Category
Water Engineering
Research subject
Soil Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-101998DOI: 10.3390/w15213819ISI: 001099507100001Scopus ID: 2-s2.0-85176505320OAI: oai:DiVA.org:ltu-101998DiVA, id: diva2:1808812
Note

Validerad;2023;Nivå 2;2023-11-01 (joosat);

CC BY 4.0 License

Funder: King Saud University (RSPD2023R958), Riyadh, Saudi Arabia

Part of special issue: GIS Solutions and Remote Sensing Applications in Monitoring, Assessing and Managing Different Aquatic and Glaciated Environments

Available from: 2023-11-01 Created: 2023-11-01 Last updated: 2024-03-11Bibliographically approved

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Al-Ansari, Nadhir

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