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Open AccessArticle
A Comparative Study on 2015 and 2023 Chennai Flooding: A Multifactorial Perspective
by
Selvakumar Radhakrishnan
Selvakumar Radhakrishnan
,
Sakthi Kiran Duraisamy Rajasekaran
Sakthi Kiran Duraisamy Rajasekaran ,
Evangelin Ramani Sujatha
Evangelin Ramani Sujatha *
and
T. R. Neelakantan
T. R. Neelakantan
School of Civil Engineering, SASTRA Deemed University, Thirumalaisamudram, Thanjavur 613 401, Tamil Nadu, India
*
Author to whom correspondence should be addressed.
Water 2024, 16(17), 2477; https://doi.org/10.3390/w16172477 (registering DOI)
Submission received: 31 July 2024
/
Revised: 22 August 2024
/
Accepted: 27 August 2024
/
Published: 30 August 2024
(This article belongs to the Section
Hydrology)
Abstract
Floods are highly destructive natural disasters. Climate change and urbanization greatly impact their severity and frequency. Understanding flood causes in urban areas is essential due to significant economic and social impacts. Hydrological data and satellite imagery are critical for assessing and managing flood effects. This study uses satellite images, climate anomalies, reservoir data, and cyclonic activity to examine the 2015 and 2023 floods in Chennai, Kanchipuram, and Thiruvallur districts, Tamil Nadu. Synthetic-aperture radar (SAR) satellite data were used to delineate flood extents, and this information was integrated with reservoir data to understand the hydrological dynamics of floods. The classification and regression tree (CART) model delineates flood zones in Chennai, Kanchipuram, and Thiruvallur during the flood years. The study region is highly susceptible to climatic events such as monsoons and cyclones, leading to recurrent flooding. The region’s reservoirs discharged floodwaters exceeding 35,000 cubic meters per second in 2015 and 15,000 cubic meters per second in 2023. Further, the study examines the roles of the Indian Ocean Dipole (IOD), which reached its peak values of 0.33 and 3.96 (positive IOD), and El Niño in causing floods here. The complex network of waterways and large reservoirs poses challenges for flood management. This research offers valuable insights for improving the region’s flood preparedness, response strategies, and overall disaster management.
Share and Cite
MDPI and ACS Style
Radhakrishnan, S.; Duraisamy Rajasekaran, S.K.; Sujatha, E.R.; Neelakantan, T.R.
A Comparative Study on 2015 and 2023 Chennai Flooding: A Multifactorial Perspective. Water 2024, 16, 2477.
https://doi.org/10.3390/w16172477
AMA Style
Radhakrishnan S, Duraisamy Rajasekaran SK, Sujatha ER, Neelakantan TR.
A Comparative Study on 2015 and 2023 Chennai Flooding: A Multifactorial Perspective. Water. 2024; 16(17):2477.
https://doi.org/10.3390/w16172477
Chicago/Turabian Style
Radhakrishnan, Selvakumar, Sakthi Kiran Duraisamy Rajasekaran, Evangelin Ramani Sujatha, and T. R. Neelakantan.
2024. "A Comparative Study on 2015 and 2023 Chennai Flooding: A Multifactorial Perspective" Water 16, no. 17: 2477.
https://doi.org/10.3390/w16172477
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