DOI: 10.5194/hess-22-2377-2018
Scopus记录号: 2-s2.0-85045892893
论文题名: Analytical flow duration curves for summer streamflow in Switzerland
作者: Clara Santos A ; , Manuela Portela M ; , Rinaldo A ; , Schaefli B
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2018
卷: 22, 期: 4 起始页码: 2377
结束页码: 2389
语种: 英语
Scopus关键词: Analytical models
; Maximum likelihood estimation
; Nonlinear systems
; Runoff
; Snow
; Soil moisture
; Stochastic models
; Stochastic systems
; Stream flow
; Daily precipitations
; Flow duration curve
; Inverse estimation
; Meteorological condition
; Natural variability
; Parameter calculation
; Soil moisture dynamics
; Systematic assessment
; Catchments
英文摘要: This paper proposes a systematic assessment of the performance of an analytical modeling framework for streamflow probability distributions for a set of 25 Swiss catchments. These catchments show a wide range of hydroclimatic regimes, including namely snow-influenced streamflows. The model parameters are calculated from a spatially averaged gridded daily precipitation data set and from observed daily discharge time series, both in a forward estimation mode (direct parameter calculation from observed data) and in an inverse estimation mode (maximum likelihood estimation). The performance of the linear and the nonlinear model versions is assessed in terms of reproducing observed flow duration curves and their natural variability. Overall, the nonlinear model version outperforms the linear model for all regimes, but the linear model shows a notable performance increase with catchment elevation. More importantly, the obtained results demonstrate that the analytical model performs well for summer discharge for all analyzed streamflow regimes, ranging from rainfall-driven regimes with summer low flow to snow and glacier regimes with summer high flow. These results suggest that the model's encoding of discharge-generating events based on stochastic soil moisture dynamics is more flexible than previously thought. As shown in this paper, the presence of snowmelt or ice melt is accommodated by a relative increase in the discharge-generating frequency, a key parameter of the model. Explicit quantification of this frequency increase as a function of mean catchment meteorological conditions is left for future research. © Author(s) 2018. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/79326
Appears in Collections: 气候变化事实与影响
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作者单位: School of Architecture Civil and Environmental Engineering (ENAC), École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland; Instituto Superior Técnico, Technical University of Lisbon, Lisbon, Portugal; Faculty of Geosciences and Environment, University of Lausanne, Lausanne, Switzerland; Dipartimento di Ingegneria Civile Edile e Ambientale, Universitá Degli Studi di Padova, Padua, Italy
Recommended Citation:
Clara Santos A,, Manuela Portela M,, Rinaldo A,et al. Analytical flow duration curves for summer streamflow in Switzerland[J]. Hydrology and Earth System Sciences,2018-01-01,22(4)