Abstract
Although floods are blessed by nature, they create disaster and terror in the lives of the people. From a geographical point of view, it has been observed that most of the world’s floods are limited to the floodplain. However, there are several differences between the nature of flooding in the coastal regions and plains. Some parts of coastal or island regions are inundated regularly by tidal waters, periodic tropical cyclones and the presence of nearby inlets, thus increasing the likelihood of flooding. In this article, the flood situation and susceptibility of a populated Sagar Island located in the Hooghly River estuary of West Bengal are discussed through the AHP model. Flood susceptibility mapping helps to highlight the actual flood-prone and susceptible areas, which has never been done before for these islands. With the help of the AHP model, it has been seen that the amount of inundated and susceptible area is much higher (62% inundation with ROC value 0.73) in the southern part of Sagar Island, i.e. near the Bay of Bengal. It is expected that if the flooded and flood-prone areas are highlighted with the help of various factors through the AHP model, it will be of help to determine the government policy and improve the flood situation.
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Acknowledgements
The author shows sincere gratitude to the Department of Science and Technology (DST), Natural Rural Data Management System (NRDMS), Govt. of India for supporting this work through the project fund. The authors also show sincere gratitude to IMD (Indian Meteorological Department), Kolkata, port trust (hydrography section) and Irrigation and Waterways Directorate, Government of West Bengal for providing the hydrological and meteorological data regarding Sagar Island. The authors also acknowledge the Digital Library of School of Water Resources Engineering, Jadavpur University, for allowing access to all the GIS and statistical software.
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The entire research work is funded by Department of Science and Technology (DST), Natural Rural Data Management System (NRDMS), Govt. of India.
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All authors contributed to the study conception and design. Material preparation, data collection and analysis and also the first draft of the manuscript were written by AG and SKB. MBR and PKR read, corrected and approved the final manuscript. The graphical and tabular presentation of the paper developed by SKM.
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Roy, P.K., Ghosh, A., Basak, S.K. et al. Analysing the Role of AHP Model to Identify Flood Hazard Zonation in a Coastal Island, India. J Indian Soc Remote Sens 51, 1171–1185 (2023). https://doi.org/10.1007/s12524-023-01697-x
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DOI: https://doi.org/10.1007/s12524-023-01697-x