Long-term persistence and multifractality of river runoff records: Detrended fluctuation studies

By Eva Koscielny-Bunde, Jan W. Kantelhardt, P. Braun, Armin Bunde, Shlomo Havlin. 2003

278 citations recorded by the source corpus.

We study temporal correlations and multifractal properties of long river discharge records from 41 hydrological stations around the globe. To detect long-term correlations and multifractal behaviour in the presence of trends, we apply several recently developed methods [detrended fluctuation analysis (DFA), wavelet analysis, and multifractal DFA] that can systematically detect and overcome non-stationarities in the data at all time scales. We find that above some crossover time that usually is several weeks, the daily runoffs are long-term correlated, being characterized by a correlation function C(s) that decays as C(s)ws Kg . The exponent g varies from river to river in a wide range between 0.1 and 0.9. The power‐law decay of C(s) corresponds to a power‐law increase of the related fluctuation function F2(s)ws H where HZ1Kg/2. We also find that in most records, for large times, weak multifractality occurs. The Renyi exponent t(q) for q between K10 and C10 can be fitted to the remarkably simple form tðqÞZKlnða q C b q Þ=ln2, with solely two parameters a and b between 0 and 1 with aCbR1. This type of multifractality is obtained from a generalization of the multiplicative cascade model. q 2005 Elsevier B.V. All rights reserved.

Subfields: Condensed Matter Physics, Economics and Econometrics, Statistical and Nonlinear Physics

View Paper: https://www.semanticscholar.org/paper/0726f898241ab2fc34ae0c0517eae425186a879c

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In Condensed Matter Physics

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  2. Osvaldo Anibal Rosso
  3. Qiuming Cheng
  4. F. Serinaldi

In Economics and Econometrics

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In Statistical and Nonlinear Physics

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  5. Günter Blöschl
  6. C. Bucher
  7. Gregor Laaha
  8. Osvaldo Anibal Rosso

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