01-05 December 2025
INCOIS, Hyderabad, India.
| Abstract Submission No. | ABS-05-0072 |
| Title of Abstract | Impact of tropical cyclone generated swell on the Indian coasts and Islands |
| Authors | Roshyal Joy*, Dr. Remya P G, Dr. B Praveen Kumar |
| Organisation | INCOIS, Hyderabad |
| Address | INCOIS, Pragathi Nagar, Nizampet Hyderabad, Telengana, India Pincode: 500090 E-mail: roshyaljoy@gmail.com |
| Country | India |
| Presentation | Oral |
| Abstract | The present study is focusing on the swells propagated from the tropical cyclone (TC) Freddy which is the long-lived cyclone and traversed the entire Indian Ocean propagating westwards in February 2023. The intensification and prolonged duration of severe TCs are anticipated to increase, making them a greater threat under future climate conditions. While swells are not the most intense wave conditions, these low frequency swells produce high wave conditions leading to coastal hazards, hence understanding the TC trends and the effect along the coastlines is crucial. The experimental runs are done using unstructured WAVEWATCH III (WW3) with a varying grid resolution of 1km-10km, from the coastlines to the offshore region respectively which was nested with a global multigrid WW3. We did three experimental runs (1) with wind forcing along the cyclone track only, to understand the propagation pattern and the intensity along the coasts. (2) wind forcing below the cyclone tracks from the Southern Ocean (SO) only in order to differentiate the effect of SO swells (3) wind forcing along the entire region. The propagation pattern reveals that swells from a large-scale cyclone such as TC Freddy, which covered the entire IO, were able to reach distant shores including India, the Gulf coast, and eastern Africa. As the swells reach the North Indian Ocean (NIO) coast, they lose up to 80% of their energy, with only low energy levels making landfall; further analysis of wave power density (WPD) along the coast shows that southern coastal regions and islands are likely to be significantly affected in similar scenarios. In summary the study emphasizes on the swell propagation pattern and the degree of impact during a similar situation, which will help us to provide coastal protection strategies during subsequent events. |
| Are you part of IIOE-2 endorsed project | no |
| Keywords | Unstructured WW3 |
| For Awards | no |