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29 January 2024 Remote sensing-based assessment of Varkala cliff retreat in Kerala, India
Reshma K. N., Jeffy Soly John, Sai Ganesh Veeravalli, Mridula G. M., Satya Kiran Raju Alluri, Ramanathan V., Ramana Murthy M. V.
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Proceedings Volume 12977, Eighth Geoinformation Science Symposium 2023: Geoinformation Science for Sustainable Planet; 129771L (2024) https://doi.org/10.1117/12.3009585
Event: 8th Geoinformation Science Symposium 2023: Geoinformation Science for Sustainable Planet, 2023, Yogyakarta, Indonesia
Abstract
Coastal cliffs are dynamic landforms that are constantly changing due to natural and anthropogenic factors. Continuous monitoring of the vulnerable cliffs is crucial to understanding their stability and developing effective strategies for managing coastal areas. An attempt to understand the retreat rate and extent of the Varkala cliff, Kerala - a geo heritage site and its contributing factors were investigated in this study. Remote sensing and GIS analysis through satellite imageries were employed to estimate the retreat. The results indicated that the Varkala cliff has retreated significantly over the past few decades, with rates of erosion varying along the length of the cliff. The causative factors that govern the retreat; such as urbanization, and geological and hydrology forces were examined. The cliff recession based on sea level rise is also examined. The findings indicate that human activities, particularly the expansion of urban areas along the cliff, have played a significant role in accelerating the retreat of the Varkala cliff. Additionally, variation in the cliff morphology has influenced the rate and pattern of retreat. The importance of considering the complex interactions between natural and anthropogenic factors in understanding cliff erosion and retreat was highlighted. This study provides important insights into the factors driving cliff erosion in Varkala. This will help develop coastal management strategies that can preserve its geological and ecological value for future generations.
(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.
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Reshma K. N., Jeffy Soly John, Sai Ganesh Veeravalli, Mridula G. M., Satya Kiran Raju Alluri, Ramanathan V., and Ramana Murthy M. V. "Remote sensing-based assessment of Varkala cliff retreat in Kerala, India", Proc. SPIE 12977, Eighth Geoinformation Science Symposium 2023: Geoinformation Science for Sustainable Planet, 129771L (29 January 2024); https://doi.org/10.1117/12.3009585
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KEYWORDS
Remote sensing
Geographic information systems
Sustainability
Data acquisition
Global Positioning System
Multispectral imaging
Risk assessment
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