DOI: 10.5194/hess-24-1159-2020
论文题名: Recession analysis revisited: Impacts of climate on parameter estimation
作者: Jachens E.R. ; Rupp D.E. ; Roques C. ; Selker J.S.
刊名: Hydrology and Earth System Sciences
ISSN: 1027-5606
出版年: 2020
卷: 24, 期: 3 起始页码: 1159
结束页码: 1170
语种: 英语
Scopus关键词: Watersheds
; Classical methods
; Hydrographs
; Hydrological properties
; Initial conditions
; Inter-arrival time
; Power-law
; Rate of change
; Recession analysis
; Parameter estimation
; antecedent conditions
; climate effect
; discharge
; hydrographic survey
; hydrological regime
; parameter estimation
; watershed
英文摘要: Recession analysis is a classical method in hydrology to assess watersheds' hydrological properties by means of the receding limb of a hydrograph, frequently expressed as the rate of change in discharge ( - dQ=dt) against discharge (Q). This relationship is often assumed to take the form of a power law -dQ=dt D aQb, where a and b are recession parameters. Recent studies have highlighted major differences in the estimation of the recession parameters depending on the method, casting doubt on our ability to properly evaluate and compare hydrological properties across watersheds based on recession analysis of -dQ=dt vs. Q. This study shows that estimation based on collective recessions as an average watershed response is strongly affected by the distributions of event inter-arrival time, magnitudes, and antecedent conditions, implying that the resulting recession parameters do not represent watershed properties as much as they represent the climate. The main outcome from this work highlights that proper evaluation of watershed properties is only ensured by considering independent individual recession events. While average properties can be assessed by considering the average (or median) values of a and b, their variabilities provide critical insight into the sensitivity of a watershed to the initial conditions involved prior to each recharge event. © 2020 Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/162766
Appears in Collections: 气候变化与战略
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作者单位: Jachens, E.R., Department of Biological and Ecologic Engineering, Oregon State University, Corvallis, OR 97330, United States; Rupp, D.E., Oregon Climate Change Research Institute, College of Earth, Oceanic, and Atmospheric Sciences, Oregon State University, Corvallis, OR 97330, United States; Roques, C., Department of Earth Sciences, ETH Zurich, Zürich, 8092, Switzerland; Selker, J.S., Department of Biological and Ecologic Engineering, Oregon State University, Corvallis, OR 97330, United States
Recommended Citation:
Jachens E.R.,Rupp D.E.,Roques C.,et al. Recession analysis revisited: Impacts of climate on parameter estimation[J]. Hydrology and Earth System Sciences,2020-01-01,24(3)