Summary: Available online at www.sciencedirect.com
Physica A 330 (2003) 283­290
www.elsevier.com/locate/physa
A stochastic model of river discharge uctuations
V. Livinaa;, Y. Ashkenazyb;c, Z. Kiznerd, V. Strygine,
A. Bundef , S. Havlind
aMinerva Center, Bar-Ilan University, Ramat-Gan 52900, Israel
bDepartment of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology,
Cambridge, MA 02139, USA
cDepartment of Environmental Sciences, Weizmann Institute, Rehovot, Israel
dDepartment of Physics, Bar-Ilan University, Ramat-Gan 52900, Israel
eDepartment of Applied Mathematics and Mechanics, Voronezh State University, Universitetskaya pl. 1,
Voronezh 394693, Russia
f Institute fur Theoretische Physik III, Justus-Liebig-Universitat Giessen, Heinrish-Bu -Ring 16,
35392 Giessen, Germany
Abstract
We study the daily river ow uctuations of 30 international rivers. Using the detrended uctu-
ation analysis, we study the correlations in the magnitudes of river ow increments (volatilities),
and ÿnd power-law correlations in volatilities for time scales less than 1 year; these correlations
almost disappear for time scales larger than 1 year. Using surrogate data test for nonlinearity, we

Source: Ashkenazy, Yossi "Yosef" - Department of Solar Energy and Environmental Physics, Jacob Blaustein Institutes for Desert Research,Ben-Gurion University of the Negev

Collections: Physics; Environmental Management and Restoration Technologies