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Spatio-temporal distribution of water availability in Karnali-Mohana Basin, western Nepal: hydrological model development using multi-site calibration approach (Part-A)

Author

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  • Pandey, Vishnu Prasad
  • Dhaubanjar, Sanita
  • Bharati, Luna
  • Thapa, Bhesh Raj

Abstract

Study region: Karnali-Mohana (KarMo) river basin, Western Nepal. > Study focus: This study has developed a hydrological model using multi-site calibration approach for a large basin, the Karnali-Mohana (KarMo) in Western Nepal, which has a lot of potential for water resources development and contribute to the national prosperity. It further applies the model to characterize hydrology and water resources availability across spatio-temporal scales to enhance understanding on water availability and potential uses. The newly developed hydrological model in Soil and Water Assessment Tool (SWAT) is capable of reproducing the hydrological pattern, the average flows, and the flow duration curve at the outlet of the basin and five major sub-basins. > New hydrological insights for this region: The model simulated results showed that about 34 % of average annual precipitation in the KarMo basin is lost as evapotranspiration, but with a large spatio-temporal heterogeneity. The Hills and Tarai are relatively wetter than the Mountains. The average annual flow volume at the basin outlet is estimated as 46,250 million-cubic-meters (MCM). The hydrological characterization made in this study are further used for climate change impact assessment (Part-B in the same journal), environmental flows assessment and evaluating trade-offs among various water development pathways, which are published elsewhere. This model, therefore, has potential to contribute for strategic planning and sustainable management of water resources to fuel the country’s prosperity.

Suggested Citation

  • Pandey, Vishnu Prasad & Dhaubanjar, Sanita & Bharati, Luna & Thapa, Bhesh Raj, 2020. "Spatio-temporal distribution of water availability in Karnali-Mohana Basin, western Nepal: hydrological model development using multi-site calibration approach (Part-A)," Papers published in Journals (Open Access), International Water Management Institute, pages 1-29:100690.
    • Handle: RePEc:iwt:jounls:h049721
    DOI: 10.1016/j.ejrh.2020.100690
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    Cited by:

    1. Pandey, Vishnu Prasad & Shrestha, Nirman & Urfels, Anton & Ray, Anupama & Khadka, Manohara & Pavelic, Paul & McDonald, Andrew J. & Krupnik, Timothy J., 2023. "Implementing conjunctive management of water resources for irrigation development: A framework applied to the Southern Plain of Western Nepal," Agricultural Water Management, Elsevier, vol. 283(C).
    2. Rohini Devkota & Utsav Bhattarai & Laxmi Devkota & Tek Narayan Maraseni, 2020. "Assessing the past and adapting to future floods: a hydro-social analysis," Climatic Change, Springer, vol. 163(2), pages 1065-1082, November.
    3. G. Harik & I. Alameddine & M. Abou Najm & M. El-Fadel, 2023. "Modified SWAT to Forecast Water Availability in Mediterranean Mountainous Watersheds with Snowmelt Dominated Runoff," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 37(5), pages 1985-2000, March.

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