Projected changes in hydro-climatic extremes with CMIP6 climate model outputs: a case of rain-fed river systems in Western Nepal

Bhattarai, Tek Narayan; Ghimire, Swastik; Aryal, Saugat; Baaniya, Yubin; Bhattarai, Saurav; Sharma, Shivani; Bhattarai, Prakash C.; Pandey, Vishnu Prasad

doi:10.1007/s00477-022-02312-0

Cited by 9 publications

(5 citation statements)

References 39 publications

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“…They find that in the RCP 4.5 scenario, monsoon precipitation would rise by 10.3 % in western Nepal and 7.6 % in eastern Nepal, and in the RCP 8.5 scenario, by 15.2 % in western Nepal, and 10 % in eastern Nepal [ 60 ]. In more recent studies, dryer winter periods are projected in SSP scenarios across near to far future period (till 2100) [ 63 ], while susceptibility to flood events under wetter monsoons has also been highlighted [ 64 ]. There is also an increased possibility that some plants, which cannot operate during the dry seasons due to insufficient discharge, may face even worse conditions due to the drying up of rivers, while others may face a change in seasonal and yearly power output.…”

Section: Impacts Of Climate Change In the Hydropower Sector And Mitig...mentioning

confidence: 99%

Evolution and future prospects of hydropower sector in Nepal: A review

Aryal,

Ghimire,

Tiwari

et al. 2024

Heliyon

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Section: Impacts Of Climate Change In the Hydropower Sector And Mitig...mentioning

confidence: 99%

Evolution and future prospects of hydropower sector in Nepal: A review

Aryal,

Ghimire,

Tiwari

et al. 2024

Heliyon

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“…Climate change and the subsequent amplification of hydro-climatic extremes have a direct impact on water resources and human health, as well as ecological well-being. , Extreme weather occurrences, such as floods, heat waves, landslides, and cyclones, jeopardize the long-term viability of water supply and sewage infrastructure and degrade water quality. Insufficient precipitation and hydrological extremes lead to the drying of the surface water and groundwater resources, leading to inadequate supply to meet increasing water demands, while heavy precipitation and flooding can cause damage to water supply and sanitation infrastructure.…”

Section: Challenges In the Current Wash Systemmentioning

confidence: 99%

Water, Sanitation, and Hygiene of Nepal: Status, Challenges, and Opportunities

et al. 2023

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Access to water, sanitation, and hygiene (WASH) has been a challenge to south Asia’s rapidly growing and climate change-sensitive region. Nepal, a water-abundant country, faces obstacles to fulfilling the highly prioritized WASH Sustainable Development Goal 6 (SDG 6). This review offers details about Nepal’s WASH status from 2000 to 2020 with regard to the challenges Nepal had in delivering reliable WASH services to the people, as well as opportunities for a sustainable way forward, and provides insights that can be applied to other developing countries. From analysis of national-level assessments, estimates point toward healthy progress in extending WASH access to the population. However, large inequalities persist at the subnational level between urban and rural residents, between poor and rich residents, and between genders. Many local constraints such as a lack of long-term infrastructural capacity to provide and maintain WASH services, financial issues, and institutional and policy incompatibilities are some of the key factors that technical considerations and private sector involvement could address. We also propose roles for Nepal’s central, provincial, and local governments for identification and adaptation to the undeniable risks of climate change. Furthermore, there is a need to capitalize on the potential opportunities for developing a much-needed robust and climate-resilient WASH sector in Nepal, safeguarding the rights of future generations to safe and clean water.

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“…Talchabhadel et al (2021) projected the future precipitation extreme indices in the WRRB, under the scenarios Representative Concentration Pathways (RCP) 4.5 and RCP 8.5 across Near Future (NF): 2025-2049; Mid Future (MF): 2050-2074; and Far Future (FF): 2075-2099. Similarly, Bhattarai et al (2022) projected climate in this region using latest CMIP6 based climate models. It was found that the heavy precipitation extremes indices (like one-day rainfall, five-day rainfall, 99th percentile rainfall, etc.)…”

Section: Implications Under Climate Changementioning

confidence: 99%

“…Nepal is vulnerable to extreme flood events due to its fragile geology, complex topography, extreme climatic events, and seismic activities which are exacerbated by rapid and uncontrolled urbanization (Bhattarai et al, 2022;Yogacharya & Gautam, 2016). Because of this, frequency of flood events in Nepal has been increasing, as indicated by recent floods in Melamchi, Kailali, Illam and other parts of Nepal (IFRC, 2021).…”

Section: Introductionmentioning

confidence: 99%

Flood Susceptibility Analysis in West Rapti River Basin Using Frequency Ratio Model

Bhattarai

Ghimire

2023

Jalawaayu

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Floods are recognized as lethal natural events, which result in devastating natural and human losses. So, identifying flood susceptible zones is crucial to adopt necessary mitigation strategies beforehand. With the advent of GIS tools and modelling techniques, mapping of such zones has become easier and more precise; yet, flood prone countries like Nepal have not been able to embrace such tools for flood risk management. With a compelling need to address this situation, this paper employs Frequency Ratio model to analyze flood susceptibility in the West Rapti River Basin. The model, created with the help of 77 flood points and tested with 30 points to obtain 80.7% accuracy, maps the flood hazard zones in the area and identifies the lower Terai and settlement regions as high-risk areas. With the increasing threat of changing climate in the future, this study also propounds better preparation of flood inventory maps in the future for more precise susceptibility analysis models and better flood risk management.

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Projected changes in hydro-climatic extremes with CMIP6 climate model outputs: a case of rain-fed river systems in Western Nepal

Cited by 9 publications

References 39 publications

Evolution and future prospects of hydropower sector in Nepal: A review

Evolution and future prospects of hydropower sector in Nepal: A review

Water, Sanitation, and Hygiene of Nepal: Status, Challenges, and Opportunities

Flood Susceptibility Analysis in West Rapti River Basin Using Frequency Ratio Model

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