DOI: 10.1002/joc.5669
论文题名: Spatio-temporal variability of extreme precipitation in Nepal
作者: Talchabhadel R. ; Karki R. ; Thapa B.R. ; Maharjan M. ; Parajuli B.
刊名: International Journal of Climatology
ISSN: 8998418
出版年: 2018
卷: 38, 期: 11 起始页码: 4296
结束页码: 4313
语种: 英语
英文关键词: extreme precipitation
; Nepal
; spatial variability
; temporal variability
; trend
Scopus关键词: Economic and social effects
; Economics
; Floods
; Landslides
; Precipitation (meteorology)
; Sea level
; Extreme precipitation
; Nepal
; Spatial variability
; Temporal variability
; Trend
; Climate change
; climate effect
; extreme event
; flood frequency
; hazard assessment
; mountain region
; precipitation intensity
; spatial distribution
; spatiotemporal analysis
; topographic effect
; trend analysis
; vulnerability
; Nepal
英文摘要: 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. © 2018 Royal Meteorological Society Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/116809
Appears in Collections: 气候减缓与适应
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作者单位: Disaster Prevention Research Institute, Kyoto University, Japan; Department of Hydrology and Meteorology, Government of Nepal, Nepal; Institute of Geography, University of Hamburg, Germany; International Water Management Institute, Nepal; Department of Environmental Engineering, Kyoto University, Japan
Recommended Citation:
Talchabhadel R.,Karki R.,Thapa B.R.,et al. Spatio-temporal variability of extreme precipitation in Nepal[J]. International Journal of Climatology,2018-01-01,38(11)