Internal sedimentary architecture and coastal dynamics as revealed by ground penetrating radar, Kachchh coast, western India

• Published in: Acta geophysica Vol. 61; no. 5; pp. 1196 - 1210
• Main Authors: Shukla, Shashi B., Chowksey, Vikas M., Prizomwala, Siddharth P., Ukey, Vishal M., Bhatt, Nilesh P., Maurya, Deepak M.
• Format: Journal Article
• Language: English
• Published: Vienna Springer Vienna 01-10-2013; Versita; Springer Nature B.V
• Subjects: Architecture; beach ridge; Beach ridges; Beaches; Coastal; coastal geomorphology; Coastlines; Coasts; Dunes; Dynamics; Earth and Environmental Science; Earth Sciences; Geomorphology; Geophysics; Geophysics/Geodesy; Geotechnical Engineering & Applied Earth Sciences; Ground penetrating radar; ground penetrating radar (GPR); Gulf of Kachchh; Inlets; Radar; Research Article; Sea level; Sea level changes; Sediments; Structural Geology; washover; Kachchh India; India; washover; Gulf of Kachchh; beach ridge; ground penetrating radar (GPR); coastal geomorphology
• ISSN: 1895-6572; 1895-7455
• DOI: 10.2478/s11600-013-0102-8

The coastline constitutes a very sensitive geomorphic domain which is constantly subjected to dynamic coastal processes and stores vital information regarding past sea level fluctuations. A ground-penetrating radar (GPR) survey was carried out along the northern coast of the Gulf of Kachchh which is one of the largest macrotidal inlets of the Arabian Sea, Western India. Our studies have delineated several radar surfaces and radar facies which reflect the internal architecture and sediment body geometry, which can be related to the processes acting along this coastline. Various radar facies, namely, beach ridge (Br), washover (Wo), coastal dune (Cd), swale (Sw), berm plain (Bp), and sandsheet facies (Ss) have been identified. The GPR studies successfully documented the subsurface presence of ancient beach ridge system towards the sea, and the coastal dunes towards the land side. The results are suggestive of signatures of changes in sea level and the coastline being prone to high energy events in the recent past. The GPR has been found to be an important non-invasive geophysical tool in the study of past coastal dynamics.