Abstract
The multifractal structure of flow distribution is investigated in the river-network model of Scheidegger [Bull. IASH 12, 15 (1967)]. It is shown that the partition function Z(q)== scales as Z(q)≊ where is the flow of water passing over the bond i within the river network, the summation ranges over all bonds, and L is the size of the river network. In the limit of a sufficiently large q, ζ(q)/q gives the exponent of the drainage basin of a river. The exponent also equals to the fractal dimension of a single river. The f-α spectrum of the normalized flow distribution is calculated. It is found that the fractal dimension of a river is exactly given by =2-α(∞). The flow distribution shows a characteristic multifractal structure for the river network. The river-width distribution also shows the multifractality if the width w of a river scales as w≊.
- Received 30 April 1992
DOI:https://doi.org/10.1103/PhysRevE.47.63
©1993 American Physical Society