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Assessing future water stress scenarios over six nuclear power plant locations of India through downscaled CMIP5 models

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Abstract

The present study has assessed the possible water stress scenarios over six nuclear power plant locations (inland plants at Kakrapar, Kota, and Narora and coastal plants at Kodankulam, Kalpakkam, and Tarapur) of India based on downscaled climatic products from 12 coupled model inter-comparison project 5 (CMIP5) simulations. Firstly, statistically downscaled scenarios over power plant locations for water temperature, precipitation, evapotranspiration, and sea surface temperature (SST) have been developed using various statistical downscaling methods. Secondly, the water stress has been quantified by formulating a multivariate standardized water stress index (MSWSI) based on water temperature and freshwater availability (precipitation minus evapotranspiration) over inland plants and a univariate index from the SST for coastal plants. Results have indicated that three inland power plants are not expecting any scarcity of freshwater availability. However, they have been projected to face high to severe water stress from middle to end of the century due to a higher warming rate of water temperature under global warming conditions. Similarly, three coastal plants have also been projected to prevail high to severe water stress through enhanced SST warming. Therefore, the efficiency and productivity of the nuclear plants may reduce under changing climatic conditions.

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Acknowledgments

The authors would like to acknowledge INDIA-WRIS portal and CWC of India for stream temperature data. Authors are also grateful to IMD for gridded rainfall data, Goddard Earth Sciences Data, and Information Services Center for GLDAS gridded evapotranspiration data and CRU, University of East Anglia for gridded temperature data. Authors would like to thank NOAA/OAR/ESRL PSL for NCEP/NCAR reanalysis data, as well as for gridded SST data and climate modeling groups of CMIP5 under WCRP for GCM outputs. Authors are thankful to the developers of the packages “ESD” and “hydroGOF” in R.

Funding

This study has been financially supported by the Department of Science and Technology (DST), Government of India, through the INSPIRE fellowship (IF150304).

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Correspondence to Lalu Das.

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Akhter, J., Das, L. & Deb, A. Assessing future water stress scenarios over six nuclear power plant locations of India through downscaled CMIP5 models. Theor Appl Climatol 142, 191–204 (2020). https://doi.org/10.1007/s00704-020-03278-1

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  • DOI: https://doi.org/10.1007/s00704-020-03278-1

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