Revisiting the Origins of the Power‐Law Analysis for the Assessment of Concentration‐Discharge Relationships
Revisiting the Origins of the Power‐Law Analysis for the Assessment of Concentration‐Discharge Relationships
复制标题
重温功率的起源——评估浓度——排放关系的定律分析
DOI:
10.1029/2023wr034910
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发表时间:
2023
影响因子:
5.4
通讯作者:
Webster, Alex J.
中科院分区:
文献类型:
--
作者:
Wymore, Adam S.;Larsen, William;Kincaid, Dustin W.;Underwood, Kristen L.;Fazekas, Hannah M.;McDowell, William H.;Murray, Desneiges S.;Shogren, Arial J.;Speir, Shannon L.;Webster, Alex J.
Concentration‐discharge (C‐Q) relationships are frequently used to understand the controls on material export from watersheds. These analyses often use a log‐log power‐law function (C=aQb) to determine the relationship betweenCandQ. Use of the power‐law inC‐Qanalyses dates to two seminal papers by Francis Hall (1970, https://doi.org/10.1029/WR006i003p00845) and Francis Hall (1971, https://doi.org/10.1029/WR007i003p00591), where he compared six increasingly complex hydrological models, concluding the power‐law had the greatest explanatory power. Hall's analyses and conclusions, however, were based on a limited data set, with assumptions regarding water volume and storage, and used simple model selection criteria. While the power‐law is applied widely, it has not been rigorously tested and evaluated in over 50 years. We reexamined Hall's original models across time scales using 8 years of high‐frequency and weekly specific conductance data and evaluated model performance using more sophisticated model selection criteria. While we found the power‐law analysis remains one of the best performing models, other models performed equally as well including the log‐linear functional form. Model performance was similar at the sub‐daily to weekly scale but varied with sampling method. More complex models performed poorly relative to simpler models and tended to underpredict concentration at flow extremes due to constraints in fitting model parameters to the observed data. While we conclude, based on the data analyzed here, that the power‐law remains a suitable model forC‐Qanalyses, opportunities exist to refine and differentiate amongC‐Qmodels based on underlying assumptions of data distribution, recession analyses, and for applying models to reactive solutes.
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DOI:
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发表时间:
2004
期刊:
影响因子:
--
作者:
W. Buytaert;B. Bièvre;G. Wyseure;J. Deckers
通讯作者:
J. Deckers
DOI:
--
发表时间:
1971
期刊:
影响因子:
--
作者:
F. R. Hall
通讯作者:
F. R. Hall
影响因子:
5.4
作者:
M. Zimmer;B. Pellerin;D. Burns;Gregory Petrochenkov
通讯作者:
Gregory Petrochenkov
影响因子:
--
作者:
Daley, Michelle L.;Potter, Jody D.;McDowell, William H.
通讯作者:
McDowell, William H.
影响因子:
5.4
作者:
L. Snyder;J. Potter;W. McDowell
通讯作者:
W. McDowell