Abstract
The morphotectonic index mapping is a key method to know the continuous interplay between sub-surface geotectonic and surface geomorphic processes. An integrated approach with fluvial geomorphology, morphotectonic, digital topography, satellite imageries and field mapping aids to represent the surficial tectonic sensitivity of the Ajay-Damodar Interfluve (ADI) region. Seven morphotectonic indices, such as Isobase Map, Hydraulic Gradient Map, Transverse Topographic Symmetry Factor or T-index, Regional Sinuosity Index, Flow Turn Angle and Structural Lineament Density, have been compiled here using geo-informatics technology. Regional Bouguer gravity anomaly data have also been compared with the obtained result. Neotectonic nomenclature is more prominent over the eastern Quaternary sedimentary lowland than western super groups of Gondwana formation and lateritic patches. The role of tectonic control on the drainage system is reflected by distinct drainage patterns, abrupt changes in flow direction, offset river channels, straight river lines, ponded river channel, marshy lands, sag ponds, palaeochannels, alluvial fans, meander cutoffs, multi-terrace river valley, incised compressed meander and convexity or knick points in longitudinal profiles.
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