Real Time Data Analysis of West Rapti River Basin of Nepal

Talchabhadel, Rocky; Sharma, Rajesh

doi:10.4236/gep.2014.25001

Cited by 17 publications

(11 citation statements)

References 3 publications

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“…Similarly, September 29, 1981; July 23, 2002; July 31, 2003; July 10, 2004 and August 18, 2009 are some of the critical days that encountered the heavy precipitation of around 450 mm in a day in one or more than one precipitation stations. During EP events, the water levels in most of the rivers rose above critical levels for a longer period of time (Talchabhadel and Sharma, ) and caused widespread damage to life and property. All of these evidences emphasize the importance of analysing EP and their spatio‐temporal variations.…”

Section: Introductionmentioning

confidence: 99%

Spatio‐temporal variability of extreme precipitation in Nepal

Talchabhadel

Karki

Thapa³

et al. 2018

Intl Journal of Climatology

Self Cite

131

106

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Nepal is one of the most vulnerable countries to climate change impacts. Extreme weather events associated with heavy precipitations are the principal causes of landslides, debris flows and all types of floods disasters in the country, which by causing tremendous losses of life and property affects the socio-economic development. Given the limited availability of knowledge in spatio-temporal distribution of precipitation in Nepal, this study analyses the spatial distribution of monthly and annual precipitation and 1-day extreme precipitation and their trends utilizing a large number of stations (291 stations for the first time) distributed across the country for the period of 1966-2015. This study focuses on the exploration of elevational dependencies of precipitation to demonstrate the effect of topographic heterogeneity caused by the numbers of broad and narrow river valleys and mountain slopes and ridges. Also, this study investigates the relation of 1-day extreme precipitation with mean annual precipitation. Our results show the peak annual precipitation elevation between 2,000 and 3,500 m above sea level, while in contrast 1-day extreme precipitation peaks are found at lower elevation in the southern foothills with its highest intensity in a central region of the country. The occurrence of 10% of mean annual precipitation in a single day has been observed in 75% of the analysed stations which in turn indicates the high likelihoods of initiation of landslides, soil erosions and floods in different parts of the country. There is no definitive countrywide decadal trend in extreme precipitation intensity and occurrence. A station-wise trend clearly shows the increase in extreme precipitation events in western mountainous regions in the recent decades. In other locations, the mixed patterns of station-wise increasing and decreasing trends are found.

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Section: Introductionmentioning

confidence: 99%

Spatio‐temporal variability of extreme precipitation in Nepal

Talchabhadel

Karki

Thapa³

et al. 2018

Intl Journal of Climatology

Self Cite

131

106

View full text Add to dashboard Cite

show abstract

“…The results show that agriculture system of the study area in a geographically vulnerable position. Talchabhadel and Sharma (2014) studied west Rapti River based on real time data analysis. About 300 people lose their life each year due to floods and landslides in Nepal with property damage exceeding 626 million NPR on average.…”

Section: Resultsmentioning

confidence: 99%

Review of Flood Hazards Studies in Nepal

2020

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Flood, a common water-induced disaster of monsoon season, is a recurring phenomenon in Nepal. It causes many deaths and injuries besides severe impacts on the vital infrastructures of the nation. This paper reviews the published national and international journal articles related to flood hazard mapping in Nepal. Desinventar database from 1971-2016 shows that Bagmati province and province 2 are more affected than other provinces in Nepal. Here we review the previous studies on flood disasters at the regional and national levels. The results show that most of the papers are based on a steady flow model for inundation mapping and more focuses on hazard analysis rather than vulnerability and risk assessment.

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“…Due to a localized nature of heavy precipitation, almost 50% of mean annual precipitation could occur in a multi‐day extreme precipitation event. The West Rapti River originates from the middle mountains of Nepal, then enters the lowlands and finally drains to the Ghagra river in India, a tributary of the Ganges River (Talchabhadel and Sharma, 2014).…”

Section: Study Areamentioning

confidence: 99%