Resumo

GINESTA TORCIVIA, Carla E.; RIOS, Natalia N.  e  ESPER ANGILLIERI, María Yanina. Morphometric characterization of the Talacasto River Basin, Central Precordillera, San Juan, Argentina. Bol. Soc. Geol. Mex [online]. 2022, vol.74, n.1, e300921.  Epub 02-Maio-2023. ISSN 1405-3322.  https://doi.org/10.18268/bsgm2022v74n1a300921.

A morphotectonic characterization of the Talacasto River basin, located in the area of Precordillera Central, province of San Juan, Argentine, is presented to identify the main morphotectonic expressions of the relief, for the contribution to the regional seismotectonic characterization. A 12.5 meters’ high resolution digital elevation model is used. The Talacasto River basin is defined under the Strahler criteria, into seven subbasins of fourth order. In this way, the necessary data for the characterization of their basic and derived parameters, longitudinal profiles of the main courses and knickpoints were obtained. The results indicate that the indices substantially differ from one sub-basin to another. The influence of Quaternary tectonic activity for the region is inferred from these results and analyzed individually river patterns, being the sub-basins located in the west of the study area the most affected.

Palavras-chave : neotectonics; morphotectonic indexes; Talacasto River basin; knickpoints.