DOI: 10.1007/s11069-020-04006-8
论文题名: Observed changes in extreme rain indices in semiarid and humid regions of Godavari basin, India: risks and opportunities
作者: Yaduvanshi A. ; Kulkarni A. ; Bendapudi R. ; Haldar K.
刊名: Natural Hazards
ISSN: 0921030X
出版年: 2020
卷: 103, 期: 1 起始页码: 685
结束页码: 711
语种: 英语
中文关键词: Extreme rain events
; Humid
; Location-specific adaptation plans
; River basin vulnerability
; Semiarid
英文关键词: annual variation
; extreme event
; humid environment
; precipitation intensity
; seasonal variation
; semiarid region
; spatiotemporal analysis
; trend analysis
; Godavari Basin
; India
英文摘要: Abstract: The present study examines the spatial and temporal changes in extreme rainfall events (EREs) across the Godavari river basin to develop adaptation strategies for vulnerable regions by understanding opportunities and risks. Indices such as consecutive dry and wet days, daily intensity, one-day highest precipitation, days with rainfall > 10 mm and 20 mm have been computed over the Godavari basin for the time period 1901–2015, and changes are compared between the two time periods 1901–1976 and 1977–2015. This study examines long-term trends on monthly and seasonal scales and climatological characteristics of EREs to understand the observed spatiotemporal changes in EREs. Analysis of EREs in the monsoon months further indicates significant trends over both traditionally “high-rainfall regions” (Humid) and “low-rainfall regions” (semiarid). In low-rainfall region, an increase in mean and coefficient of variability of annual rainfall has been identified during 1977–2015 as compared to pre-1977 period. It is also found that the month of September experienced statistically significant increase in frequency and intensity of all wet extreme rain indices during the period 1977–2015. Extremes in high- and low-rainfall regions show significant increase during 1977–2015 as compared to 1901–1976. Century scale analysis of extreme events with reference to regional level changes would help in looking at the grass root reality for the estimation of water budget as well as for developing region-specific adaptation measures and crop contingency plans. These findings would feed into state action plan for climate change to take appropriate measures to combat changing and rapidly occurring EREs in different climate zones of Godavari basin. Graphic abstract: [Figure not available: see fulltext.] © 2020, Springer Nature B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/168814
Appears in Collections: 气候变化与战略
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作者单位: W-CReS, WOTR Center for Resilience Studies, Watershed Organisation Trust (WOTR), 2nd Floor, The Forum, Padmavati Corner, Pune, Maharashtra, India; Climate Variability and Prediction, Indian Institute of Tropical Meteorology, Pune, Maharashtra, India; Independent Researcher, Hyderabad, India; Department of Mathematics, Ranchi University, Ranchi, Jharkhand, India
Recommended Citation:
Yaduvanshi A.,Kulkarni A.,Bendapudi R.,et al. Observed changes in extreme rain indices in semiarid and humid regions of Godavari basin, India: risks and opportunities[J]. Natural Hazards,2020-01-01,103(1)