Spatio-temporal trends of rainfall across Indian river basins

  • Deepak Singh Bisht
  • Chandranath Chatterjee
  • Narendra Singh Raghuwanshi
  • Venkataramana Sridhar
Original Paper

DOI: 10.1007/s00704-017-2095-8

Cite this article as:
Bisht, D.S., Chatterjee, C., Raghuwanshi, N.S. et al. Theor Appl Climatol (2017). doi:10.1007/s00704-017-2095-8

Abstract

Daily gridded high-resolution rainfall data of India Meteorological Department at 0.25° spatial resolution (1901–2015) was analyzed to detect the trend in seasonal, annual, and maximum cumulative rainfall for 1, 2, 3, and 5 days. The present study was carried out for 85 river basins of India during 1901–2015 and pre- and post-urbanization era, i.e., 1901–1970 and 1971–2015, respectively. Mann–Kendall (α = 0.05) and Theil–Sen’s tests were employed for detecting the trend and percentage of change over the period of time, respectively. Daily extreme rainfall events, above 95 and 99 percentile threshold, were also analyzed to detect any trend in their magnitude and number of occurrences. The upward trend was found for the majority of the sub-basins for 1-, 2-, 3-, and 5-day maximum cumulative rainfall during the post-urbanization era. The magnitude of extreme threshold events is also found to be increasing in the majority of the river basins during the post-urbanization era. A 30-year moving window analysis further revealed a widespread upward trend in a number of extreme threshold rainfall events possibly due to urbanization and climatic factors. Overall trends studied against intra-basin trend across Ganga basin reveal the mixed pattern of trends due to inherent spatial heterogeneity of rainfall, therefore, highlighting the importance of scale for such studies.

Supplementary material

704_2017_2095_MOESM1_ESM.xlsx (94 kb)
ESM 1.(XLSX 93 kb)

Copyright information

© Springer-Verlag Wien 2017

Authors and Affiliations

  • Deepak Singh Bisht
    • 1
  • Chandranath Chatterjee
    • 1
  • Narendra Singh Raghuwanshi
    • 1
  • Venkataramana Sridhar
    • 2
  1. 1.Department of Agricultural and Food EngineeringIndian Institute of TechnologyKharagpurIndia
  2. 2.Department of Biological Systems EngineeringVirginia Polytechnic Institute and State UniversityBlacksburgUSA

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