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HYDRAULIC INVESTIGATIONS FOR POST TSUNAMI IMPACT AT HUT BAY—A CASE STUDY

ABSTRACT Hut Bay is situated in the Little Andaman between Andaman and Nicobar Islands and is about 110 km towards south of Port Blair. Hut Bay has a minor port which caters to the inter island vessels. The devastating earthquake and tsunami of 26th December, 2004 has caused severe damage to the rubble mound breakwater at Hut Bay and adjoining areas. Hydraulic investigations were carried out at CWPRS, Pune to assess the impact of the tsunami in the vicinity of Hut Bay Port to facilitate restoration of the damaged breakwater and for the future development. Numerical models MIKE-21 HD and MIKE-21 ST were used to simulate hydrodynamics and siltation respectively, in order to assess the post tsunami impact on the flow and siltation aspects in the bay. The environmental data used for the present study includes waves, wind, tide, currents and sediment characteristics. The studies elucidated that there is no significant change in the flow field and siltation pattern/bed thickness after the devastating tsunami. Based on the studies it was suggested that further development of the harbour along with the ongoing restoration work may be continued.