DOI: 10.1002/2015GL066007
论文题名: A, b careful: The challenge of scale invariance for comparative analyses in power law models of the streamflow recession
作者: Dralle D. ; Karst N. ; Thompson S.E.
刊名: Geophysical Research Letters
ISSN: 0094-8518
EISSN: 1944-8249
出版年: 2015
卷: 42, 期: 21 起始页码: 9285
结束页码: 9293
语种: 英语
英文关键词: correlation
; power law
; scaling
; Streamflow recession
Scopus关键词: Correlation methods
; Functions
; Comparative analysis
; Information contents
; Parameter analysis
; Power-law
; Power-law functions
; Power-law parameters
; Scale-free properties
; Scaling
; Stream flow
; comparative study
; correlation
; data interpretation
; empirical analysis
; hydrograph
; numerical model
; parameterization
; power law
; scale effect
; streamflow
; variance analysis
英文摘要: The falling limb of the hydrograph - the streamflow recession - is frequently well approximated by power law functions, in the form dq/dt = -aqb, so that recessions are often characterized in terms of their power law parameters (a, b). The empirical determination and interpretation of the parameter a is typically biased by the presence of a ubiquitous mathematical artifact resulting from the scale-free properties of the power law function. This reduces the information available from recession parameter analysis and creates several heretofore unaddressed methodological "pitfalls." This letter outlines the artifact, demonstrates its genesis, and presents an empirical rescaling method to remove artifact effects from fitted recession parameters. The rescaling process reveals underlying climatic patterns obscured in the original data and, we suggest, could maximize the information content of fitted power laws. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84955210947&doi=10.1002%2f2015GL066007&partnerID=40&md5=d99e9d8eb478956d18995f25a8976edd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8134
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Department of Civil and Environmental Engineering, University of California, Berkeley, CA, United States
Recommended Citation:
Dralle D.,Karst N.,Thompson S.E.. A, b careful: The challenge of scale invariance for comparative analyses in power law models of the streamflow recession[J]. Geophysical Research Letters,2015-01-01,42(21).