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Himalayan Geology, Vol. 30 (2), 2009, pp.147-154 Printed in India
Control of Tectonics and Climate
on Chhoti Gandak River Basin, East Ganga Plain, India
D.S. SINGH, A. AWASTHI, V. BHARDWAJ
Centre of Advanced Study in Geology,
University of Lucknow, Lucknow-226007, India
Abstract:
Chhoti Gandak is a 250 km long ground water fed meandering river. It
originates in the terai area of Maharajganj district of Uttar Pradesh and
drains into Ghaghara River near Gothani in Siwan district of Bihar state.
The drainage basin, water discharge, sediment load, and slope gradient
determining its energy are controlled by climate and tectonics which evolve
and decide the type of fluvial landforms. The role of tectonics is
determined by morphometric parameters such as hypsometric integral (HI),
drainage basin asymmetry factor (AF), stream length - gradient index (SL),
and transverse topographic symmetry factor (T). These geomorphic indices
indicate active tectonics in this basin and tilting towards west. Narrow
channel confined between wide valley, nature of cliffs, and discharge of
river exhibit role of climate in this region. In the present paper
geomorphological and morphometric analysis have been carried out to
interpret control of tectonics, and climate in the Chhoti Gandak River
basin. |
