A megacity in a changing climate: the case of Kolkata

Dasgupta, Susmita; Gosain, A. K.; RAO, S. GOPAL; Roy, Sonali; Sarraf, Maria

doi:10.1007/s10584-012-0516-3

Cited by 49 publications

(20 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The natural factors include the low relief and topography, natural subsidence together with cyclones, storm surges and heavy rainfall. Unplanned urbanization, the low capacity drainage system, siltation in sewerage channels and human-induced subsidence are included in developmental factors (Dasgupta et al 2013). The Kolkata Municipal Corporation (KMC) has recently introduced (September 2018) a comprehensive citylevel Flood Forecasting and Early Warning System (FFEWS) making Kolkata as the first city in India having this kind of facility.…”

Section: Kolkata Citymentioning

confidence: 99%

“…A framework for a realtime flood inundation forecasting model was proposed using a sewer flow-overland flow combined model, the results of which can be disseminated to the public through the internet. The flood vulnerability of the city was assessed considering intense precipitation events for return periods of 30, 50 and 100 years using rainfall data, emission scenarios and the sea-level rise for 2050 (Dasgupta et al 2013). The outcome was a geographically overlaid, location-specific inundation depth and duration forecast.…”

Section: Kolkata Citymentioning

confidence: 99%

“…Increased flooding in the region is caused by increased precipitation together with high tide and extreme storm surge. Dasgupta et al (2013) studied the hydrological and hydraulic impacts of extreme precipitation due to climate change by 2050. The study employed three models to capture the flooding: (1) Soil and Water Assessment Tool (SWAT) (hydrological model), (2) Hydrologic Engineering Centre-River Analysis System (HEC-RAS) (hydraulic model) and (3) Storm Water Management Model (SWMM) (urban storm model), and historical rainfall data from continuous recording rain gauges for 25 years.…”

Section: Climate Change Impacts and Flood Risksmentioning

confidence: 99%

“…We also delineate the potential impacts of flood-induced risks in the select coastal cities: Surat, Mumbai, Kolkata and Chennai. According to the previous studies (Revi 2008;Bhat et al 2013;Ranger et al 2011;Joerin et al 2012;Nicholls et al 2008;Dasgupta et al 2013), the most important risks posed by floods in Indian coastal cities are primarily due to (1) the riverine flooding and extreme precipitation, (2) the effect of cyclonic storms, tsunamis and tidal inundation, (3) failure in urban planning and unsustainable land-use practices. Flood risks are usually coupled with cyclones, storm surges, tides and tsunami across different geographical locations having a difference in impact categories, including riverine flooding, urban flooding, population growth, transportation, energy demand and climate variability.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Flood risk and adaptation in Indian coastal cities: recent scenarios

et al. 2018

View full text Add to dashboard Cite

Coastal cities contrive to spread their transformative influence both into the hinterland, along the coastline, and into the coastal waters themselves. These effects will be intensified in urban agglomerations as the concentration of population and allied activities are more pronounced there compared to the inland regions. Indian coastal cities are no exception, and it is high time to delineate these hazard-prone regions and implement proper mitigation and adaptation strategies at city scale. This review article provides an assessment regarding quantification, management and climate change impacts of flood risks in Surat, Mumbai, Chennai and Kolkata, which are the most populated coastal cities in India. The flood impacts considered in the existing or prevailing analyses are associated with adverse effects on population, land use of cities, transportation and economy caused by different types of riverine and urban flooding, though coastal flooding, tsunami and storm surge effects are less studied. Mumbai and Kolkata are relatively progressive in the assessment of flood risks and adaptation. The present article also suggests strategies to evaluate the relative progress in the assessment of past and future risks and adaptation. We also discuss the mitigation and adaptation strategies considering the historical importance of these cities. We propose that the strategies should be implemented considering public opinion and should be initialized at the grass root level. Though it is technically difficult to re-plan the city structures in the current scenario, it is possible to adapt to and mitigate the effects of natural hazards through suitable planning and management with the integrated cooperation and involvement of citizens and government as well.

show abstract

Section: Kolkata Citymentioning

confidence: 99%

Section: Kolkata Citymentioning

confidence: 99%

Section: Climate Change Impacts and Flood Risksmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Flood risk and adaptation in Indian coastal cities: recent scenarios

et al. 2018

View full text Add to dashboard Cite

show abstract

“…Urbanization has significant effects on local climates as it is seen in China (Zhou et al, 2004;Liu et al, 2011), South Korea (Chung et al, 2004), Pakistan (Sajjad et al, 2009a;Sajjad et al, 2009b), Mexico (Jauregui, 1997), Saudi Arabia (Almazroui et al, 2013), Israel (Kafle and Bruins, 2009), Paris in France (Lemonsu et al, 2013), and India (Mohan et al, 2011;Dasgupta et al, 2013). Thus urbanization has been accepted as a cause of increased local temperatures in urban settings.…”

Section: Introductionmentioning

confidence: 99%

Evolution of urbanization and its impact on temperature trends of Quetta city in Pakistan

Sajjad

Blond

2020

Eur J. Clim Ch.

View full text Add to dashboard Cite

Quetta is an important economic, historical and culturally a rich city located in the south-west of Pakistan. Like many other cities of the world, Quetta faced massive urbanization during last three decades. It has 1.1 million populations. The consequences of rapid urbanization in Quetta city are significant through changing urban area's temperatures than its nearby regional areas as a result of alteration of natural land cover change into built-surfaces at city scale. In this context, the objective of this study is to explore the effect of urbanization on variability of minimum (dTn) and maximum (dTx) temperature trends of Quetta city by comparing with nonurban regional stations. For this purpose, first the evolution of urbanization during 1980s to 2013 was analysed by using satellite image processing techniques for the years 1989, 2000 and 2013. To study the impact of urbanization on dTn and dTx of Quetta city, the time series data of daily average monthly minimum (Tn) and maximum (Tx) temperatures ranging from 1947 to 2013 of Quetta city and the seven regional stations were analysed by using linear regression. The results show that during last twenty years, urban population and urban surface area increased to 80% and 194%, respectively. The variation in annual and seasonal temperature trends depicted that Tn and Tx at Quetta city are increasing more than the regional stations and Tn increased faster than Tx at urban and regional scale except winter season.

show abstract