Longshore Sediment Transport Rate for Different Energy Regime Coast along the East Coast of India

Noujas, V.; Kankara, R.S.; Kiran Raju, S.A., and Ramana Murthy, M.V., 2024. Longshore sediment transport rate for different energy regime coast along the east coast of India. In: Phillips, M.R.; Al-Naemi, S., and Duarte, C.M.(eds.), Coastlines under Global Change: Proceedings from the International Coastal Symposium (ICS) 2024 (Doha, Qatar).Journal of Coastal Research, Special Issue No. 113, pp. 110-114.Charlotte (North Carolina), ISSN 0749-0208. Longshore sediment transport (LST) plays a critical role in shaping beach morphology and erosion patterns along coastal areas. In this study, the Longshore Sediment Transport Rate (LSTR) was calculated for both the medium-energy coast of the southern sector and the low-energy coast of the central sector of Andhra Pradesh, on the east coast of India, using a numerical model. Key inputs for LSTR computations included nearshore wave climate, bathymetry, sediment characteristics, and nearshore currents. Nearshore wave climate data were generated from regional wave models established for the southern and central coast of Andhra Pradesh, while the hydrodynamic model simulations were conducted using wave model outputs and global tide data. The results indicated that sediment transport in the southern sector was significantly higher compared to the central sector, which is already protected by a spit, resulting in lower sediment transport rates due to its low-energy nature. The sediment transport patterns in the southern sector followed similar trends observed in other locations along the east coast of India. This study, employing numerical models, contributes to an enhanced understanding of sediment transport dynamics, providing valuable insights for coastal management and mitigation strategies. Moreover, the study demonstrated the efficacy of numerical models in estimating sediment transport across different energy regime coasts, highlighting the potential applicability of this methodology to coastal areas worldwide for LSTR estimation.