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Streamflow alterations, attributions, and implications in extended East Rapti Watershed, central-southern Nepal

Author

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  • Pandey, Vishnu Prasad
  • Shrestha, Dibesh
  • Adhikari, M.
  • Shakya, S.

Abstract

Streamflow alteration and subsequent change in long-term average, seasonality, and extremes (e.g., floods and droughts) may affect water security, which is a major concern in many watersheds across the globe. Both climatic and anthropogenic activities may contribute to such changes. Therefore, this study assesses: (i) Streamflow and precipitation trends to identify streamflow alterations in the Extended East Rapti (EER) watershed in central-southern Nepal; (ii) relationship of the alterations to climatic and anthropogenic sources; and (iii) implications of streamflow changes to the socio-environmental system. The trends in streamflow were analyzed for pre-and post-1990 periods considering the abrupt shift in temperature trend in 1990. Results showed a general decreasing trends in discharge post-1990 in the EER watershed. Human activities have significantly contributed in altering streamflow in the EER. Human-induced streamflow alterations have affected the water availability, food security, river health, aquatic biodiversity, and groundwater abstraction in the EER watershed.

Suggested Citation

  • Pandey, Vishnu Prasad & Shrestha, Dibesh & Adhikari, M. & Shakya, S., 2020. "Streamflow alterations, attributions, and implications in extended East Rapti Watershed, central-southern Nepal," Papers published in Journals (Open Access), International Water Management Institute, pages 1-12(9):382.
    • Handle: RePEc:iwt:jounls:h049715
    DOI: 10.3390/su12093829
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    References listed on IDEAS

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