01-05 December 2025
INCOIS, Hyderabad, India.
| Abstract Submission No. | ABS-05-0031 |
| Title of Abstract | Sea surface wave during extreme weather in the coastal water off Mumbai |
| Authors | G Udhaba Dora, Trupti Bangadkar*, Gopal Krushna Swain, Toyoshima Xavier, V Sanil Kumar |
| Organisation | CSIR-National Institute of Oceanography |
| Address | CSIR ⿿ National Institute Of Oceanography, Lokhandwala Road, 4 Bungalows, Andheri West MUMBAI, Maharashtra, India Pincode: 400053 E-mail: udhaba.nio@csir.res.in |
| Country | India |
| Presentation | Poster |
| Abstract | Under the current scenario of weather and climate, coastal deformation has been identified as one of the prime stressors globally. The resultant sea surface disturbance generated by wind-sea and swell is a standalone factor that drastically impacts the coastal deformation on a short scale, especially during extreme weather, like cyclones. In the Arabian Sea, the frequency as well as intensity of cyclone formation are quite countable over time. The cyclone Tauktae is one of the extremely severe cyclonic storms that affected most of the coastal belt from Kerala to Gujarat along the west coast of India during 14-19 May 2021. The capital city, Mumbai, is one of the threatened zones affected significantly. Based on the in-situ observation through a wave rider buoy deployed at 10 m water depth off Versova, the half-hourly spectral density characteristics revealed that the usual significant wave height (Hsig) varied up to 1.2 m, while the maximum wave height (Hmax) was 2.8 m, which intensified to 4.7 m and 7.4 m, respectively, during Tauktae. During the cyclone phase, the waves were propagating coast at the directional bandwidth of 202.5-265.8°, having the peak period of 4-11.76 s with an average of 9.39 s. Concurrently, the half-hourly wave energy and power were rapidly raised up to 28.24*103 J/m2 and 84.76 kW/m, which is 15 and 19 times the normal sea performance in the coastal water off Mumbai. This belt is a low-lying area, and the backshore zone can be identified very sparsely. Based on the real-time sea surface wave observation, this study illustrates a high degree of vulnerability at the Mumbai coast, especially during such kinds of extreme weather conditions. Hence, a functioning early warning system is cost-effective, and issuing warnings well in advance will be highly beneficial to society. |
| Are you part of IIOE-2 endorsed project | no |
| Keywords | Cyclone Tauktae, Coastal Wave, Wave Energy, Wave Power, Coastal stressor |
| For Awards | no |