DOI: 10.1007/s11069-020-03936-7
论文题名: Selection of a basin-scale model for flood frequency analysis in Mahanadi river basin, India
作者: Swetapadma S. ; Ojha C.S.P.
刊名: Natural Hazards
ISSN: 0921030X
出版年: 2020
卷: 102, 期: 1 起始页码: 519
结束页码: 552
语种: 英语
中文关键词: Annual maximum series
; Bootstrap sampling
; Design flood estimation
; Generalized extreme value
; Regression analysis
; Statistical ranking method
英文关键词: basin analysis
; bootstrapping
; catchment
; flood frequency
; frequency analysis
; probability
; ranking
; regression analysis
; return period
; river basin
; sampling
; watershed
; Bay of Bengal
; India
; Mahanadi Basin
英文摘要: The present study provides an insight into a systematic evaluation of probability distributions using some statistical measures along with a few relevant catchment and flow properties to select a basin-scale model for flood frequency analysis (FFA) of Mahanadi river basin, India. A comprehensive analysis identified generalized extreme value (GEV), Pearson type 3, generalized Pareto, and Gumbel as the best-fit candidates for FFA of the watershed. GEV was selected as the basin-scale model based on a descriptive statistical ranking method followed by its test for predictive ability through bootstrap sampling. The distribution parameters were correlated with a few hydrological and physiographic characteristics of the watershed through regression analysis. The predictive capability of the regressed equations was assessed by comparing the observed mean annual flood (MAF) with the anticipated MAF derived from the expected value of GEV density function. Various return period quantiles were estimated using the parameters obtained from these equations and compared with the observed values, which confirmed the robustness of the physically based GEV model over the entire watershed. Flood flow values estimated at the gauging sites considering the site-wise best distribution and the basin-scale standard model were compared. The marginal difference of error between them further supported the application of a standard model for the entire basin despite site-wise different models. © 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/168761
Appears in Collections: 气候变化与战略
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作者单位: Department of Civil Engineering, IIT Roorkee, Roorkee, Uttarakhand 247667, India
Recommended Citation:
Swetapadma S.,Ojha C.S.P.. Selection of a basin-scale model for flood frequency analysis in Mahanadi river basin, India[J]. Natural Hazards,2020-01-01,102(1)