By T.N. Prakash, L. Sheela Nair, T.S. Shahul Hameed
The Lakshadweep islands are a gaggle of 36 coral islands within the Indian Ocean. those small islands are distinct for his or her aquatic bio-diversity and immense blue lagoons. This publication offers the result of reviews performed by means of the authors in the course of the interval 1990 to 2009 that deal with the seashore morphology, hydrodynamics, strength assets and administration innovations with distinct connection with the problem of either common and anthropogenic coastal erosion. The really low island elevation makes the islands extra vulnerable to high-wave assault and coastal flooding in the course of opposed climatic conditions. The islands also are susceptible to dangers from episodic occasions like cyclones and deep depressions. This highlights the necessity for a complete research of the wave, weather and coastal strategies at paintings in the course of varied seasons to delineate the criteria answerable for coastline alterations and likewise to spot the destinations that want defense and the administration options.
This booklet will function a consultant to researchers, students and scholars who're drawn to the coastal methods of coral islands.
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Extra info for Geomorphology and Physical Oceanography of the Lakshadweep Coral Islands in the Indian Ocean
2a, b). 1c, d). 2e). The long-term shoreline changes show that almost all the islands in this group exhibit an overall accreting trend. 3a). The maximum recession of shoreline of 47 m is observed near the jetty. 58 km) compared to the other group of islands. 51 km) is found to be stable. 2. 4. The profiles were compared and beach volume changes computed for each station to assess the stability of the beach at each of the reference station. The data on the cumulative volume changes are used further to classify the beaches into stable, accreting and eroding.
0 s during the year, the lowest being observed in November and the highest in February. Generally, Tp is lower during June–August, as in the case of Tz. The wave directions ranged from 106 to 316°N during the year. S-SW directions persist throughout the year and these directions dominate during most of the periods except when the southwest monsoon is intense with dominance of westerly waves. Easterly components are observed during November–January. The mean current direction in the offshore is towards southwest during the measurement periods of January, February, March and October while it is northnortheasterly in April and December.
1]) 10 Sig. 2 Wave Periods The usually referred wave period parameters are the zero-crossing period and the peak period. The zero-crossing period (Tz) is the time taken by two successive crests to cross the zero or mean water level. It represents the average period of the waves in a wave train. Similarly, the period corresponding to the maximum wave energy spectrum is referred as peak period (Tp). It is mostly used in engineering applications at it represents the peak energy of the wave train.