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Himalayan Geology, Vol. 31
(2), 2010, pp. 97-106, Printed in India
Fractal analysis of river channels and fault activity along the Kazerun
fault zone
(Zagros, Iran)
DAVOD POREH
Tu Freiberg; Freiberg (09599); Germany; Agricolla Str.14-No1702A;
Email: d.poreh@gmail.com
Abstract: In the Kazerun-Khormoj area of the western Zagros, fractal
dimension (D) was estimated for nine fluvial channels to quantify the
influence of neotectonic activity on the rivers. We assume that river
channels loose complexity (high fractal dimension) and linearize (low
fractal dimension), when topographic changes triggered by faults modify the
river-network geometry. We use SPOT 4, Landsat ETM+, and SRTM data to derive
information about the degree of geomorphologic control on channel networks
and the box counting method of fractal analysis to estimate D-values for
each channel; we obtained D values close to 1, meaning that the rivers are
self-affine fractal features. The most active faults in this region are the
Karbas and Sabzposhan strike-slip faults, and recent earthquakes also
confirm the activity of these faults. This study shows how widely available
remote sensing data can be used to provide information on the distribution
of active faulting across large areas of deformation.
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