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Estuarine and Coastal Erosions

  • Gautam Kumar Das
Chapter
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Part of the Coastal Research Library book series (COASTALRL, volume 11)

Abstract

Sunderbans is characterised by anastomising network of tidal rivers, creeks and minor salt water courses. This estuarine coast is undergoing continuous changes due to the action of the asymmetric tidal flow regime, river fluxes, waves, sea level change and the vagaries of nature in the form of cyclones and storms which are almost regular phenomena. Depositional and erosional features are observed at river banks, point bars, mid channel bars and the intertidal swash platforms. Sandy deposits are eroded because of resuspension and transported by seaward waves and tides whereas mud is eroded by scouring and transported by suspension. The erosion and accretion process over the Sunderbans delta might have a bearing on the neotectonic activity on the Bengal Basin.

Keywords

Erosion Accretion Flood and ebb flow Bank subsidence Sediment trapping Slumping Undercutting 

References

  1. Allen JRL (1984) Sedimentary structures, their character and physical bases. Development in sedimentology. Elsevier, AmsterdamGoogle Scholar
  2. Bell HS (1940) Armoured mud balls-their origin, properties and role in sedimentation. J Geol 48:1–31CrossRefGoogle Scholar
  3. Bhattacharya A (1999) Embankments and their ecological impacts: a case study from the tropical low-lying coastal plains of the deltaic Sunderbans, India. In: Grann H, Vollmer M (eds) Large-scale constructions in coastal environments. Springer, Berlin, pp 171–180CrossRefGoogle Scholar
  4. Bhattacharya A (2000) Some geomorphic observations indicating shoreline variation in the coastal tract of West Bengal (India) – a case study around Bakkhali in Sunderbans. In: Proceedings of the international quaternary seminar on INQUA shoreline. Indian Ocean Sub-Commission, New Academic Publishers, Delhi, pp 32–37Google Scholar
  5. Das GK (2008) Evidences of some erosional features along the river bank of Sunderbans, India. Geogr Rev India 70(2):139–145Google Scholar
  6. Das GK (2009a) Beach processes of Tidal Islands of Hugli Estuary, West Bengal. Geogr Rev India 71(3):240–248Google Scholar
  7. Das GK (2009b) Beach erosion for crab -burrowing. Indian Sci Cruiser 23(1):58–59Google Scholar
  8. Das GK (2010a) Environmental status of Bakkhali Beach, West Bengal. Geogr Rev India 72(2):132–139Google Scholar
  9. Das GK (2010b) Biodiversity in Sunderbans. In: Dwivedi AK, Tripathi SC (eds) Environment and biodiversity, environmental pollution and risk to biodiversity. Lambert Academic Publishing AG & Co., Saarbrucken, pp 1–34Google Scholar
  10. Das GK, Bhattacharya A (1994) A piecemeal mechanism of bank erosion following subsidence: a case study from Thakauran river of deltaic Sundarban, West Bengal. J Indian Soc Coast Agric Res 12:231–234Google Scholar
  11. Dyer KR (1977) Lateral circulation effects in estuaries. In: Officer CB (ed) Estuaries, geophysics of the environment-overview, summary and recommendations. Natl Acad Sci 22–29Google Scholar
  12. Ginsberg SS, Perillo GME (2004) Characteristics of tidal channels in a mesotidal estuary of Argentina. J Coast Res 20(2):489–497CrossRefGoogle Scholar
  13. Gopinath G, Seralathan P (2005) Rapid erosion of the coast of Sagar Island, W.B. India. Environ Geol 48:1058–1067CrossRefGoogle Scholar
  14. Kilburn RN (1977) Description of new species of Amalda Chilotygma (Gastropoda: Olividae: Ancillinae) with a note on the systematics of Amalda, Ancillus and Ancillista. Ann Natal Mus 3(1):13–21Google Scholar
  15. Marshall AJ, Williams WD (1982) Textbook of zoology, vol 1, 7th edn. Macmillan, LondonGoogle Scholar
  16. Roychaudhuri S, Sengupta R, Rakshit S, Biswas NR (2003) Vulnerability of the West Bengal coastal zone. Newsl Mar Wing Geol Surv India XVII:33–35Google Scholar
  17. Simon DB, Richardson EV (1962) Resistance to flow in alluvial channels. Trans Am Soc Civ Eng 127:927–953Google Scholar
  18. Uehara K, Sojisuporn P, Saito Y, Jarupongsakul T (2010) Erosion and accretion processes in a muddy dissipative coast, the Chao Phraya River delta. Thail Earth Surf Process Landf 35:1701–1711CrossRefGoogle Scholar

Copyright information

© Springer International Publishing Switzerland 2015

Authors and Affiliations

  • Gautam Kumar Das
    • 1
  1. 1.Department of Chemical EngineeringJadavpur UniversityKolkataIndia

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