Interaction of monsoonal wave, current and tide near Gopalpur, east coast of India, and their impact on beach profile: a case study

P. Mishra (), S. Patra, M. Ramana Murthy, P. Mohanty and U. Panda

Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, 2011, vol. 59, issue 2, 1145-1159

Abstract: A 97-day-long record on waves and currents was obtained using wave rider buoy and current meter moored at 2.5 km off Gopalpur from 19 May to 23 August 2008 representing southwest monsoon months. A Valeport tide gauge was used to record water level at Gopalpur port. Simultaneously, beach profiles at 4 transects were monitored using real-time kinematic (RTK) global positioning system (GPS). A total of 636,167 waves were analyzed for the period; a range of 3,200–9,700 waves approach the coast in an individual day. During the study, unusual characteristics of wave were observed on July 29, 2008, with a magnitude of significant wave height, H s = 2.85 m, maximum wave height, H max = 5.22 m, and peak wave period, T p = 10.2 s, and on August 11, 2008, with H s = 2.28 m, H max = 5.37 m, and T p = 11.1 s. Significant beach loss was noticed during these periods, and severe erosion was recorded on August 1, 2008. Beach profile data indicates that 18–58 cu. m/m sediment was lost during the study period. The paper provides an overview of the statistical analysis of wave heights, periods, direction, and spectral energy density and explains the cause of coastal erosion and loss of sediment. Copyright Springer Science+Business Media B.V. 2011

Keywords: Wave; Beach profile; Coastal erosion; Gopalpur; India (search for similar items in EconPapers)
Date: 2011
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DOI: 10.1007/s11069-011-9826-4

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