Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XXXIX-B8, 215-220, 2012
https://doi.org/10.5194/isprsarchives-XXXIX-B8-215-2012
© Author(s) 2012. This work is distributed under
the Creative Commons Attribution 3.0 License.
 
28 Jul 2012
IDENTIFICATION OF GEOMORPHIC SIGNATURES OF NEOTECTONIC ACTIVITY USING DEM IN THE PRECAMBRIAN TERRAIN OF WESTERN GHATS, INDIA
K. S. Jayappa, V. J. Markose, and M. Nagaraju Dept. of Marine Geology, Mangalore University Mangalagangothri, Karnataka, India
Keywords: DEM, Geomorphology, GIS, Identification, Geology, Stream length gradient (SL) index Abstract. To assess the relative tectonic activity classes, five geomorphic indices such as stream-gradient index (SL), drainage basin asymmetry (Af), hypsometric integral (Hi), valley floor width – valley height ratio (Vf) and drainage basin shape (Bs) of ninety-four sub-basins of Valapattanam river basin have been analysed by applying the standard formulae. Relative tectonic activity classes (Iat) obtained by the average (S/n) of different classes of geomorphic indices have been classified into three groups. Group I shows high tectonic activity with values of S/n < 2; group II shows moderate tectonic activity with S/n > 2 to < 2.5; and group III shows low tectonic activity with values of S/n ≥ 2.5. Field evidences such as deep valleys, sudden changes in the river course and waterfalls at fault planes clearly agree with the values and classes of tectonic geomorphic indices.
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Citation: Jayappa, K. S., Markose, V. J., and Nagaraju, M.: IDENTIFICATION OF GEOMORPHIC SIGNATURES OF NEOTECTONIC ACTIVITY USING DEM IN THE PRECAMBRIAN TERRAIN OF WESTERN GHATS, INDIA, Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XXXIX-B8, 215-220, https://doi.org/10.5194/isprsarchives-XXXIX-B8-215-2012, 2012.

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