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Littoral processes and their relevance to the submergence of ancient ports along Andhra coast, India

DRS at CSIR-National Institute of Oceanography

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Title Littoral processes and their relevance to the submergence of ancient ports along Andhra coast, India
 
Creator Chauhan, O.S.
 
Description The study of environmental parameters along the coast of Andhra Pradesh, India reveals that the area during December to March experiences mild waves (H sub(alpha) approx 1 m, T sub(alpha) approx 6 sec) predominantly from NE. Modification of wave parameters takes place in April and high waves (H sub(alpha) greater than 2m, T sub(alpha) greater than 8 sec., dir, 180-270) prevail during May-September. Qualitative picture of littoral currents also vary with the changes in the prevalent wave parameters. These currents were from NE for the waves from 90 degrees and from SW for 120 degrees wave approaches. Rio currents were also observed in these patterns. The observed currents were from NE (intensity 0-40 cm sec) in February whereas they were from SW (magnitude 20-70 cm sec sup(-1)) in September. Based on sediment budget between February 1981 to September 1982, it is found that about 117 m sediment deposits in a storm to swell cycle. The average rate of sediment deposition was 58 to 65 m for swell to storm profile transformation. The bivariant plots of size measures suggest that the source of the sediments is through river source. The dominance of depositional processes leading to the accretionary nature of the coast and their relationship with the submergence of ancient harbours in this region is discussed.
 
Date 2009-05-12T10:33:04Z
2009-05-12T10:33:04Z
1991
 
Type Book Chapter
 
Identifier Recent Advances in Marine Archaeology. Proceedings of the second Indian Conference on Marine Archaeology of Indian Ocean Countries, January 1990, Ed. by: Rao, S.R. 102-112p.
http://drs.nio.org/drs/handle/2264/3300
 
Language en
 
Rights Copyright [1991]. All efforts have been made to respect the copyright to the best of our knowledge. Inadvertent omissions, if brought to our notice, stand for correction and withdrawal of document from this repository.
 
Publisher NIO, Goa