Evaluación basada en SIG de la tectónica activa a partir de parámetros morfométricos e índices geomórficos de la cuenca del río Pindo al sur de Ecuador

Abstract

Abstract: The tectonic evaluation of the Pindo River basin in southern Ecuador, using morphometric parameters and geomorphic indices for 169 third-order sub-basins, in conjunction with tectonic structures recognized in the region, indicate notable anomalies in the northern and western parts of the basin, associated with uplift and terrain changes caused by active faults, forming V river valleys. Most of the third order sub-basins are in a juvenile phase, suggesting progressive erosion that could lead to a mature or penillanura state in the future. The analysis of the Ksn index and the distribution of knickpoints, related to faults such as the Las Aradas fault system, indicate that tectonic activity is the main cause of the anomalies present. In addition, the Chi index reveals that the basin is in a process of fluvial capture and a possible loss of drainage area in favor of these adjacent basins, highlighting a dynamic of geomorphological competition that could modify the hydrographic configuration of the region in the future.