气候变化领域集成服务门户(CCPortal): Recession analysis revisited: Impacts of climate on parameter estimation

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DOI	10.5194/hess-24-1159-2020
	Recession analysis revisited: Impacts of climate on parameter estimation
	Jachens E.R.; Rupp D.E.; Roques C.; Selker J.S.
发表日期	2020
ISSN	1027-5606
起始页码	1159
结束页码	1170
卷号	24 期号:3
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).
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
来源期刊	Hydrology and Earth System Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/159476
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
推荐引用方式 GB/T 7714	Jachens E.R.,Rupp D.E.,Roques C.,et al. Recession analysis revisited: Impacts of climate on parameter estimation[J],2020,24(3).
APA	Jachens E.R.,Rupp D.E.,Roques C.,&Selker J.S..(2020).Recession analysis revisited: Impacts of climate on parameter estimation.Hydrology and Earth System Sciences,24(3).
MLA	Jachens E.R.,et al."Recession analysis revisited: Impacts of climate on parameter estimation".Hydrology and Earth System Sciences 24.3(2020).