Journal
PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS
Volume 388, Issue 6, Pages 927-934Publisher
ELSEVIER
DOI: 10.1016/j.physa.2008.11.025
Keywords
River flow; Multifractal behavior; Multifractal detrended fluctuation analysis (MF-DFA); East River basin; Pearl River basin
Categories
Funding
- Research Grants Council of the Hong Kong Special Administrative Region, China [CUHK405308]
- Faculty of Social Science
- Chinese University of Hong Kong [4450183]
- National Natural Science Foundation of China [40701015, 30570426]
- Fok Ying Tung Education Foundation of China [101004]
- CAS (The Chinese Academy of Sciences)
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Scaling behaviors of the long daily streamflow series of four hydrological stations (Longchuan (1952-2002), Heyuan (1951-2002), Lingxia (1953-2002) and Boluo (1953-2002)) in the mainstream East River, one of the tributaries of the Pearl River (Zhujiang River) basin, were analyzed using multifractal detrended fluctuation analysis (MF-DFA). The research results indicated that streamflow series of the East River basin are characterized by anti-persistence. MF-DFA technique showed similar scaling properties in the streamflow series of the East River basin on shorter time scales, indicating universal scaling properties over the East River basin. Different intercept values of the fitted lines Of log-log Curve of F-q(s) versus s implied hydrological regulation of water reservoirs. Based on the numerical results, we suggested that regulation activities by water reservoirs Could not impact the scaling properties of the streamflow series. The regulation activities by water reservoir only influenced the fluctuation magnitude. Therefore, we concluded that the streamflow variations were mainly the results of climate changes, and precipitation variations in particular. Strong dependence of generalized Hurst exponent h(q) on q demonstrated multifractal behavior of streamflow series of the East River basin, showing 'universal' multifractal behavior of river runoffs. The results of this study may provide valuable information for prediction and assessment of water resources under impacts of climatic changes and human activities in the East River basin. (C) 2008 Elsevier B.V. All rights reserved.
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