Spatio-temporal distribution of water availability in Karnali-Mohana Basin, Western Nepal: Climate change impact assessment (Part-B)

Vishnu Prasad Pandey; Sanita Dhaubanjar; Luna Bharati; Bhesh Raj Thapa

doi:10.1016/j.ejrh.2020.100691

Spatio-temporal distribution of water availability in Karnali-Mohana Basin, Western Nepal: Climate change impact assessment (Part-B)

Vishnu Prasad Pandey^*
, Sanita Dhaubanjar
, Luna Bharati
, Bhesh Raj Thapa

^*Corresponding author for this work

International Water Management Institute (IWMI)
extern
Universal Engineering and Science College

Research output: Contribution to journal › Article › Academic › peer-review

Abstract

Study region: Karnali-Mohana river basin, Western Nepal. Study focus: This study aims to project future climate and assess impacts of climate change (CC) on water availability in the Karnali-Mohana (KarMo) basin. Bias-corrected future climate was projected based on ensembles of multiple models selected from a set of 19 regional climate models (RCMs). The impacts on water availability were then assessed by forcing a well calibrated and validated hydrological model with projected future precipitation (P) and temperature (T) for various climatic scenarios. New hydrological insights for this region: Results showed that future T is projected to increase spatio-temporally with higher rate for the mountain stations in the winter season; whereas future P has no distinct spatio-temporal trend but increase in dry season precipitation for future periods. The projected changes in P, T and evapotranspiration are expected to alter average annual flow at the outlets of the KarMo and its sub-basins, albeit with varying rate. The simulated results showed higher impacts in water availabilty at higher altitudes, thus indicating higher vulnerability of northern mountainous region to CC than the southern flatlands. Being the first ever study of such nature in the study area, these results will be useful for planning and development of climate-resilient water development projects in the region.

Original language	English
Article number	100691
Journal	Journal of Hydrology: Regional Studies
Volume	29
DOIs	https://doi.org/10.1016/j.ejrh.2020.100691
Publication status	Published - Jun 2020
Externally published	Yes

Bibliographical note

Funding Information:
This study is made possible by the generous support of the American people through the United States Agency for International Development (USAID) under Digo Jal Bikas (DJB) projected. The contents are the responsibility of the authors and do not necessarily reflect the views of USAID or the United States Government.

Publisher Copyright:
© 2020 The Author(s)

Funding

This study is made possible by the generous support of the American people through the United States Agency for International Development (USAID) under Digo Jal Bikas (DJB) projected. The contents are the responsibility of the authors and do not necessarily reflect the views of USAID or the United States Government.

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 13 Climate Action

Keywords

Climate change
Karnali
Mohana
Water resources
Western Nepal

Access to Document

10.1016/j.ejrh.2020.100691

Cite this

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title = "Spatio-temporal distribution of water availability in Karnali-Mohana Basin, Western Nepal: Climate change impact assessment (Part-B)",

abstract = "Study region: Karnali-Mohana river basin, Western Nepal. Study focus: This study aims to project future climate and assess impacts of climate change (CC) on water availability in the Karnali-Mohana (KarMo) basin. Bias-corrected future climate was projected based on ensembles of multiple models selected from a set of 19 regional climate models (RCMs). The impacts on water availability were then assessed by forcing a well calibrated and validated hydrological model with projected future precipitation (P) and temperature (T) for various climatic scenarios. New hydrological insights for this region: Results showed that future T is projected to increase spatio-temporally with higher rate for the mountain stations in the winter season; whereas future P has no distinct spatio-temporal trend but increase in dry season precipitation for future periods. The projected changes in P, T and evapotranspiration are expected to alter average annual flow at the outlets of the KarMo and its sub-basins, albeit with varying rate. The simulated results showed higher impacts in water availabilty at higher altitudes, thus indicating higher vulnerability of northern mountainous region to CC than the southern flatlands. Being the first ever study of such nature in the study area, these results will be useful for planning and development of climate-resilient water development projects in the region.",

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author = "Pandey, \{Vishnu Prasad\} and Sanita Dhaubanjar and Luna Bharati and Thapa, \{Bhesh Raj\}",

note = "Funding Information: This study is made possible by the generous support of the American people through the United States Agency for International Development (USAID) under Digo Jal Bikas (DJB) projected. The contents are the responsibility of the authors and do not necessarily reflect the views of USAID or the United States Government. Publisher Copyright: {\textcopyright} 2020 The Author(s)",

year = "2020",

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doi = "10.1016/j.ejrh.2020.100691",

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T2 - Climate change impact assessment (Part-B)

AU - Pandey, Vishnu Prasad

AU - Dhaubanjar, Sanita

AU - Bharati, Luna

AU - Thapa, Bhesh Raj

N1 - Funding Information: This study is made possible by the generous support of the American people through the United States Agency for International Development (USAID) under Digo Jal Bikas (DJB) projected. The contents are the responsibility of the authors and do not necessarily reflect the views of USAID or the United States Government. Publisher Copyright: © 2020 The Author(s)

PY - 2020/6

Y1 - 2020/6

N2 - Study region: Karnali-Mohana river basin, Western Nepal. Study focus: This study aims to project future climate and assess impacts of climate change (CC) on water availability in the Karnali-Mohana (KarMo) basin. Bias-corrected future climate was projected based on ensembles of multiple models selected from a set of 19 regional climate models (RCMs). The impacts on water availability were then assessed by forcing a well calibrated and validated hydrological model with projected future precipitation (P) and temperature (T) for various climatic scenarios. New hydrological insights for this region: Results showed that future T is projected to increase spatio-temporally with higher rate for the mountain stations in the winter season; whereas future P has no distinct spatio-temporal trend but increase in dry season precipitation for future periods. The projected changes in P, T and evapotranspiration are expected to alter average annual flow at the outlets of the KarMo and its sub-basins, albeit with varying rate. The simulated results showed higher impacts in water availabilty at higher altitudes, thus indicating higher vulnerability of northern mountainous region to CC than the southern flatlands. Being the first ever study of such nature in the study area, these results will be useful for planning and development of climate-resilient water development projects in the region.

AB - Study region: Karnali-Mohana river basin, Western Nepal. Study focus: This study aims to project future climate and assess impacts of climate change (CC) on water availability in the Karnali-Mohana (KarMo) basin. Bias-corrected future climate was projected based on ensembles of multiple models selected from a set of 19 regional climate models (RCMs). The impacts on water availability were then assessed by forcing a well calibrated and validated hydrological model with projected future precipitation (P) and temperature (T) for various climatic scenarios. New hydrological insights for this region: Results showed that future T is projected to increase spatio-temporally with higher rate for the mountain stations in the winter season; whereas future P has no distinct spatio-temporal trend but increase in dry season precipitation for future periods. The projected changes in P, T and evapotranspiration are expected to alter average annual flow at the outlets of the KarMo and its sub-basins, albeit with varying rate. The simulated results showed higher impacts in water availabilty at higher altitudes, thus indicating higher vulnerability of northern mountainous region to CC than the southern flatlands. Being the first ever study of such nature in the study area, these results will be useful for planning and development of climate-resilient water development projects in the region.

KW - Climate change

KW - Karnali

KW - Mohana

KW - Water resources

KW - Western Nepal

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DO - 10.1016/j.ejrh.2020.100691

M3 - Article

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SN - 2214-5818

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JO - Journal of Hydrology: Regional Studies

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ER -

Spatio-temporal distribution of water availability in Karnali-Mohana Basin, Western Nepal: Climate change impact assessment (Part-B)

Abstract

Bibliographical note

Funding

UN SDGs

Keywords

Access to Document

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