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 and Bhesh Raj Thapa

Papers published in Journals (Open Access), 2020, 29:100691.

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 availability 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.

Keywords: Water availability; Spatial distribution; River basins; Climate change; Impact assessment; Forecasting; Water resources; Hydrology; Models; Precipitation; Temperature; Monsoon climate; Meteorological stations; Nepal; Karnali-Mohana River Basin; Bheri River Basin; Seti River Basin; Tila River Basin (search for similar items in EconPapers)
Date: 2020
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Citations: View citations in EconPapers (3)

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Persistent link: https://EconPapers.repec.org/RePEc:iwt:jounls:h049744

DOI: 10.1016/j.ejrh.2020.100691

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