International Journal of Oceans and Oceanography

Susant Kumar Misra ¹, P. Chandramohan ², A. Satyanarayana Murty ³, Jitendra Kumar Panigrahi ⁴, R. Mahadevan ¹

Affiliations
1 INDOMER Coastal Hydraulics (P) Ltd, 63 Gandhi Road, Alwar Thirunagar, Chennai – 600 087, IN
2 INDOMER Coastal Hydraulics (P) Ltd, 63 Gandhi Road, Alwar Thirunagar, Chennai – 600 087, IN
3 Department of Marine Sciences, Berhampur University, Berhampur – 760 007, IN
4 DHI – NTU Research Centre, DHI Water and Environment, Singapore – 128388, SG

Abstract

The objective of the present study is to simulate the tide induced flow field in the Bay of Bengal (BOB) using MIKE 21 HD module of DHI. Later these currents that were measured in the coastal region between Kodikarai in Tamilnadu and Digha in West Bengal along the East Coast of India close to nearly 50 m water depth were also compared with that of the simulated. Between Nagapattinam (Lat. 10.76º N) and Paradip (Lat. 20.26º N), over a distance of nearly 1000 km (~10º of latitude), the tides propagate from deep water to the coast with their fronts nearly parallel to the coast. The variation of the tidal ranges between Nagapattinam to Paradip was found to be from 0.62 m to 1.87 m. The simulated current magnitudes in BOB were observed to increase slowly from south to north (i.e. 0.075 m/s at Nagapattinam to 0.249 m/s at Paradip), as the magnitudes of M2 and S2 tidal constituents increase from Nagapattinam to Paradip. The highest tidal currents of the order of 0.4 m/s were found at the Head of the Bay. Similarly, the directions of tide induced currents during the flood and the ebb phases of tides were observed to remain almost same at all stations from Nagapattinam to Paradip along the ECI.

Keywords

Naval Hydrographic Charts, Tidal Constituents, MIKE 21 Hydrodynamic Module, MIKE 21 Toolbox, Mike 0 Tool box, ECI.

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