<p>The Indian Peninsula is widely recognized as a tectonically robust area dominated by old lithology, rivers, and landscapes. But some areas of this old landscape, existence of young topography and past seismic activity strongly suggest function of tectonic carving. This study examines the patterns in the spatial orientation of tectonic structures in Cauvery basin of peninsular India, as well as the prevailing orientations of structural characteristics and their relationships to these patterns. In order to comprehend the landscape advancement and deformation trends within the Cauvery basin of peninsular India, we investigated parameters viz., steepness index (Ksn), Chi, kinckpoint, and hypsometric integral analysis using GIS and METLAB tools. The watershed delineation of the Cauvery basin along with thorough drainage network has been generated through SRTM DEM and some software assistance viz., Arc GIS, Global Mapper and MATLAB. The central portion of the basin is more active than than remaining parts of the basin, even though the entire peninsular India is tectonically stable part. The central area of the basin in vicinity to Kollegal-Sivasamudram Fault, Mekedatu Fault, Hogenakal Fault and Mettur Fault shows more Knickpoints, a high value for the hypsometric integral, and exhibits a high rate of incision, all of which demonstrate neotectonics rejuvenation in this area.</p>

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Quantifying morphotectonic deformation in the Cauvery River Basin, peninsular India

  • Kalpana Gururani,
  • Reshmi MR,
  • Girish Ch Kothyari

摘要

The Indian Peninsula is widely recognized as a tectonically robust area dominated by old lithology, rivers, and landscapes. But some areas of this old landscape, existence of young topography and past seismic activity strongly suggest function of tectonic carving. This study examines the patterns in the spatial orientation of tectonic structures in Cauvery basin of peninsular India, as well as the prevailing orientations of structural characteristics and their relationships to these patterns. In order to comprehend the landscape advancement and deformation trends within the Cauvery basin of peninsular India, we investigated parameters viz., steepness index (Ksn), Chi, kinckpoint, and hypsometric integral analysis using GIS and METLAB tools. The watershed delineation of the Cauvery basin along with thorough drainage network has been generated through SRTM DEM and some software assistance viz., Arc GIS, Global Mapper and MATLAB. The central portion of the basin is more active than than remaining parts of the basin, even though the entire peninsular India is tectonically stable part. The central area of the basin in vicinity to Kollegal-Sivasamudram Fault, Mekedatu Fault, Hogenakal Fault and Mettur Fault shows more Knickpoints, a high value for the hypsometric integral, and exhibits a high rate of incision, all of which demonstrate neotectonics rejuvenation in this area.