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(Article of periodic en Anglais - 2012)

Document title

Impact of neotectonics on drainage network evolution reconstructed from morphometric indices : case study from NW Indian Himalaya

Authors(s) and Affiliation(s)

PHARTIYAL B. (1) ; KOTHYARI G.C. (2) ;
(1) Birbal Sahni Inst. of Palaeobotany, Univ., Lucknow, INDE
(2) Inst. of Seismological Research, Gandhinagar, INDE

Abstract

The Spiti river (constituting of Spiti and Parachu basins) was examined using geomorphic field methods and OSL dating. The Quaternary saw ubiquitous mass movements and catastrophic landslides which transported material from steep slopes to valley bottoms and were responsible for the formation of lakes (preserved as thick sequences of fine sediment), while the outburst floods redistributed sediment downvalley affecting life and property downstream. The morphometric approach such as Basin Asymmetry (AF), Topographic Symmetric Factor (T), Stream length Gradient Index (GI) Hydauralic Sinuosity Index (HSI), Topographic sinuosity Index (TSI) and Standard Sinuosity Index (SSI) have helped in understanding tectonic and climatic perturbation. The observations point towards a tectonically active region with enormous piles of loose, unconsolidated sediment cover which could be disastrous during the slight shift of the climatic and tectonic forces operating in this area

Source

Article of periodic

published at : Zeitschrift für Geomorphologie / ISSN 0372-8854 / CODEN ZGMPAG

Editor : Gebruder Borntraeger, Stuttgart - ALLEMAGNE (1925)

Millesime : 2012, vol. 56, no1 [pp. 121-140]

Bibliographic references : 28 ref.

Collation : 7 fig., 4 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 8829

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1127/0372-8854/2011/0059

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2012
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