Coastal vulnerability assessment using Geospatial technologies and a Multi-Criteria Decision Making approach – a case study of Kozhikode District coast, Kerala State, India

Climate change-induced marine hazards are increasingly threatening coastal zones, with a two-fold increase in the last decade. In this study, we assessed coastal vulnerability using the multi-criteria decision making (MCDM) method in conjunction with geospatial applications. Data on five physical va...

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Veröffentlicht in:Journal of coastal conservation 2022-06, Vol.26 (3), Article 16
Hauptverfasser: Naga Kumar, K. Ch. V., Deepak, P. M., Basheer Ahammed, K. K., Rao, Kakani Nageswara, Gopinath, Girish, Dinesan, V. P.
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container_issue 3
container_start_page
container_title Journal of coastal conservation
container_volume 26
creator Naga Kumar, K. Ch. V.
Deepak, P. M.
Basheer Ahammed, K. K.
Rao, Kakani Nageswara
Gopinath, Girish
Dinesan, V. P.
description Climate change-induced marine hazards are increasingly threatening coastal zones, with a two-fold increase in the last decade. In this study, we assessed coastal vulnerability using the multi-criteria decision making (MCDM) method in conjunction with geospatial applications. Data on five physical variables: geomorphology, coastal slope, shoreline change history, spring tide range and significant wave height were extracted from the optical and microwave remote sensing images, existing maps and GIS processing for the 78-km-long coastal zone of Kozhikode district, which was taken as a case study. Weighted analysis of these variables and their subunits was performed using the analytical hierarchical method. These data were then processed to calculate the coastal vulnerability index (CVI), which ranged between 0.06 and 0.44 for the study area with higher CVI values indicating higher risk of hazards. The coastal risk analysis made using the geometric interval classification of the entire range of CVI values indicated that more than a third of the Kozhikode coast is under high risk to coastal hazards. Our study demonstrated the importance of integrating geospatial and MCDM analysis for a robust coastal vulnerability assessment in determining the hazard proneness of different coastal segments.
doi_str_mv 10.1007/s11852-022-00862-7
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subjects Analysis
Beach slope
Case studies
Climate change
Coastal erosion
Coastal hazards
Coastal Sciences
Coastal zone
Coastal zones
Coasts
Decision making
Earth and Environmental Science
Geographical information systems
Geography
Geomorphology
Hazards
Multiple criteria decision making
Multiple criterion
Nature Conservation
Oceanography
Remote sensing
Remote Sensing/Photogrammetry
Risk analysis
Shorelines
Significant wave height
Spring tides
Vulnerability
Wave height
title Coastal vulnerability assessment using Geospatial technologies and a Multi-Criteria Decision Making approach – a case study of Kozhikode District coast, Kerala State, India
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