Climatic Change

, Volume 116, Issue 3–4, pp 747–766 | Cite as

A megacity in a changing climate: the case of Kolkata

  • Susmita Dasgupta
  • Asvani K. Gosain
  • Sandhya Rao
  • Subhendu Roy
  • Maria Sarraf


Projections by the Intergovernmental Panel on Climate Change suggest that there will be an increase in the frequency and intensity of climate extremes in the 21st century. Kolkata, a megacity in India, has been singled out as one of the urban centers vulnerable to climate risks. Modest flooding during monsoons at high tide in the Hooghly River is a recurring hazard in Kolkata. More intense rainfall, riverine flooding, sea level rise, and coastal storm surges in a changing climate can lead to widespread and severe flooding and bring the city to a standstill for several days. Using rainfall data, high and low emissions scenarios, and sea level rise of 27 cm by 2050, this paper assesses the vulnerability of Kolkata to increasingly intense precipitation events for return periods of 30, 50, and 100 years. It makes location-specific inundation depth and duration projections using hydrological, hydraulic, and urban storm models with geographic overlays. High resolution spatial analysis provides a roadmap for designing adaptation schemes to minimize the impacts of climate change. The modeling results show that de-silting of the main sewers would reduce vulnerable population estimates by at least 5 %.


  1. Asian Development Bank (2008) Climate Change ADB Programs. Strengthening mitigation and adaptation in Asia and the Pacific,com_docman/task,doc_view/gid,940. Accessed December 2011
  2. Chatterjee RS, Fruneaub B, Rudant JP, Roy PS, Frison P-L, Lakhera RC, Dadhwal VK, Saha R (2006) Subsidence of Kolkata (Calcutta) city, India during the 1990s as observed from space by Differential Synthetic Aperture Radar Interferometry (D-InSAR) technique. Remote Sensing Environ 102:176–185CrossRefGoogle Scholar
  3. Dickson E, Tiwari A, Baker J, Hoornweg D (2010) Understanding urban risk: an approach for processing disaster and climate risks in cities. World Bank, Washington, MimeoGoogle Scholar
  4. Dube SK, Rao AD, Sinha PC, Murty TS, Bahulayan N (1997) Storm surge in the Bay of Bengal and Arabian Sea: the problem and its prediction. Mausam 48:283–304Google Scholar
  5. EM-DAT (2010) The International Disaster Database. Prepared by the Centre for Research on the Epidemiology of Disasters-CRED Accessed June 2012
  6. Emery D, Finnerty J, Stowe J (2007) Corporate financial management, chapter 6. In: Risk and return. Prentice Hall, Upper Saddle River, NJGoogle Scholar
  7. Hansen J (2006) Can we still avoid dangerous human-made climate change? Presentation on December 6, 2005 to the American Geophysical Union in San Francisco, California. Available at: (Accessed February, 2011)
  8. Hansen J (2007) Scientific reticence and sea level rise. Environ Res Lett 2Google Scholar
  9. Hansen JE, Sato M (2011) Paleoclimate implications for human-made climate change. NASA Goddard Institute for Space Studies and Columbia University Earth Institute. MimeoGoogle Scholar
  10. Hanson S, Nicholls R, Ranger N, Hallegatte S, Corfee-Morlot J, Herweijer C, Chateau J (2011) A global ranking of port cities with high exposure to climate extremes. Clim Chang 104:89–111CrossRefGoogle Scholar
  11. IPCC Fourth Assessment Report: Climate Change (2007) AR4, Accessed December 2011
  12. Jain I, Rao AD, Jitendra V, Dube SK (2010) Computation of expected total water levels along the east coast of India. J Coast Res 26(4):681–687CrossRefGoogle Scholar
  13. JICA (2008) “Interim report, study on climate impact adaptation and mitigation in Asian coastal mega cities.” Prepared by the Integrated Research System for Sustainability Science, University of TokyoGoogle Scholar
  14. Karim MK, Mimura N (2008) Impacts of climate change and sea-level rise on cyclonic storm surge floods in Bangladesh. Glob Environ Chang 18(3):490–500CrossRefGoogle Scholar
  15. KMC (2010) Basic statistics of Kolkata. Accessed December 2011
  16. KMDA (2010) Kolkata Metropolitan Development Authority. Accessed December 2010
  17. KMPC (2004) Vision 2025—a perspective plan of Kolkata Metropolitan Authority, Kolkata Metropolitan Planning CommitteeGoogle Scholar
  18. Kolkata Municipal Corporation (2007) Kolkata environmental improvement project: sewerage and drainage master plan for Kolkata. MimeoGoogle Scholar
  19. Nakicenovic N, Swart R (eds) (2000) Emissions scenarios. Special report of the Intergovernmental Panel on Climate Change. Cambridge University Press, Cambridge, p 559Google Scholar
  20. Nandy DR (2007) Need for seismic microzonation of Kolkata megacity, Proceedings of workshop on microzonation, Indian Institute of science, Bangalore, India, June 26–27Google Scholar
  21. Neumann J (2009) Sea-level rise scenarios for the World Bank economics of adaptation to climate change study. April. MimeoGoogle Scholar
  22. NIST/SEMATECH e-Handbook of Statistical Methods (2010), Accessed December 2011
  23. Overpeck J, Otto-Bliesner B, Miller G, Muhs D, Alley R, Kiehl J (2006) Paleoclimatic evidence for future ice-sheet instability and rapid sea-level rise. Science 311:1747–1750CrossRefGoogle Scholar
  24. Pfeffer WT, Harper JT, O’Neel S (2008) Kinematic constraints on glacier contributions to 21st-century sea-level rise. Science 321:1340–1343CrossRefGoogle Scholar
  25. Rahmstorf S (2007) A semi-empirical approach to projecting future sea-level rise. Science 315:368–370, CrossRefGoogle Scholar
  26. Sugiyama M (2008) The study on climate impact adaptation and mitigation in Asian coastal mega cities of integrated research system for sustainability science, University of Tokyo. Final Report to JICAGoogle Scholar
  27. UN Department of Economic and Social Affairs (2005) World urbanization prospects: the 2005 revisionGoogle Scholar
  28. UNFCC (2008) Physical and socio-economic trends in climate-related risks and extreme events, and their implications for sustainable development, Accessed December 2011
  29. U.S Army Corp of Engineers (2002) HEC-RAS river analysis system: hydraulic reference manual, November 2002Google Scholar
  30. Vermeer M, Rahmstorf S (2009) Global sea level linked to global temperature. Proc Natl Acad Sci 106(51):21527–21532CrossRefGoogle Scholar
  31. World Bank (2010a) Cities and climate change: an urgent agendaGoogle Scholar
  32. World Bank (2010b) Climate risks and adaptation in Asian coastal megacities: a synthesis reportGoogle Scholar
  33. World Bank (2011) Economics of adaptation to climate change: Bangladesh Accessed December 2011
  34. World Meteorological Institute (2010) Current extreme weather events., Accessed December 2011

Copyright information

© Springer Science+Business Media B.V. 2012

Authors and Affiliations

  • Susmita Dasgupta
    • 1
  • Asvani K. Gosain
    • 2
  • Sandhya Rao
    • 3
  • Subhendu Roy
    • 1
  • Maria Sarraf
    • 1
  1. 1.World BankWashingtonUSA
  2. 2.Department of Civil EngineeringIndian Institute of TechnologyDelhiIndia
  3. 3.INRM Consultants Pvt. Ltd.DelhiIndia

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