Textural and depositional processes of surface sediments of Kalpakkam, Southeast Coast of India

• Published in: Frontiers of earth science Vol. 6; no. 4; pp. 392 - 404
• Main Authors: Natesan, Usha, Deepthi, K, Muthulakshmi, A. L, Ferrer, Vincent A, Narasimhan, S. V, Venugopalan, V. P
• Format: Journal Article
• Language: English
• Published: Heidelberg Springer-Verlag 01.12.2012; Higher Education Press; SP Higher Education Press; Springer Nature B.V
• Subjects: beach; Beaches; Coastal environments; depositional environment; Earth and Environmental Science; Earth Sciences; energy; Environmental engineering; grain size; Holocene; Human influences; humans; Inlets; Kalpakkam; manmade structures; Marine biology; Marine environment; Ocean floor; Research Article; Rivers; rolling; seabed; sediment; Sediment transport; sediments; Tidal inlets; Wave energy; 卡尔; 印度; 样品收集; 沉积过程; 海岸; 海滩环境; 表层沉积物; 质地; India; ISW, India; ISW, India, Tamil Nadu, Chennai Dist., Kalpakkam; seabed; depositional environment; grain size; Kalpakkam; sediment; beach
• ISSN: 2095-0195; 2095-0209
• DOI: 10.1007/s11707-012-0330-2

To understand the influence of human dis- turbance on the sediment processes along Kalpakkam coast, India, beach and seabed sediments at 200 m, 500 m, and 1 km into the sea were collected monthly for one year and analyzed. Coarser material close to the tidal inlets （river） and manmade structures （sea wall） indicate the effect of these features in altering the grain size distribution from the general trend. The bivariant plots confirm the dominance of deposition under beach environment. The CM diagram （C-one percentile grain diameter, M - median） divulges that the deposition takes place by suspension and rolling of sediments with C 〈 1 mm. Linear discriminate function analysis for sediments at Kalpakkam indicates a shallow marine environment for all the samples collected. On the multigroup multivariant discriminant functions V1 -V2 diagram, the bulk of the samples from Kalpakkam to Mahabalipuram fall in the field of beach deposition. These results show that reworked sediments, submerged during the Holocene marine transgression are being deposited on present-day beaches by waves, currents and rivers in the study area. Though a high wave energy environment is prevailing in the study area, dominant northward sediment transport along the Kalpakkam-Mahabalipuram human interventions. Beach coast is not altered due to building activity in front of the sea wall ensures the safety of Indira Gandhi Centre for Atomic Research （IGCAR） from wave actions without causing any significant changes to the coastal environment.