Geology and Geomorphology of the Manipur Valley Using Digitally Enhanced Satellite Image and SRTM DEM in the Eastern Himalaya, India

Abdullah Khan, Sarfaraz Ahmad, Shadab Khurshid

Department of Earth Sciences, Sikkim University, Gangtok, India.
Department of Geology, Aligarh Muslim University, Aligarh, India.

DOI: 10.4236/ijg.2012.325101                

Abstract

Landsat ETM+ data and SRTM DEM data were used to delineate the geological, structural and geomorphological features in the intermontane Imphal Valley in Manipur, India. This area has simple geology, structural features and there- fore provides an ideal site to test the utility of remote sensing and GIS techniques in geological studies. The various techniques such as band ratioing, Principal Component Analysis (PCA) and generation of FCC (False Colour Composite) were employed on ETM+ data. The SRTM DEM data is used in generating the west-east transects of altitude pro- files in the valley for characterization of altitude levels of the litho-units. DEM derived drainage network and relative drainage density in the basin were used in interpreting the location of fault plane in the valley. The slope and lineament maps were prepared using SRTM DEM. It suggests that entire valley is covered by very low slope (0? - 9?). Lineaments are oriented N-S, 180? while in south-east of valley the direction is largely NW-SE. The change in lineament direction suggests that the eastern side of the valley is controlled by Indonesian Island arc strike direction.

Keywords

Imphal Valley; Remote Sensing and Geographical Information Systems; SRTM DEM; Landsat ETM+

Conflicts of Interest

The authors declare no conflicts of interest.

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