El patrón hidrográfico de la cuenca del río Blanco: control tectónico y geomorfológico

Authors

  • María Mardones Universidad de Concepción (Chile)
  • Julius Jara Universidad de Concepción (Chile)
  • José Vargas Universidad de Concepción (Chile)

DOI:

https://doi.org/10.4067/S0718-34022007000200005

Keywords:

Hydrographic capture, river patterns evolution, morphoclimatic control river system, Holocene, fluvial geomorphology

Abstract

The geometry and dynamics of the hydrographic pattern in the Blanco River basin, display major changes in short periods of geologic time, as a response to tectonic, climatic and geomorphologic variations. Captures and Postglacial reorganization of the pattern, were characterized by morphometric hortonian type analysis of Radar Images from NASA SRTM Mission (2000), using the River Tools and ENVI programs, as well as 1 :50.000 topographic maps from the I.G.M. The geomorphologic mapping was done by photo interpretation and field work. Two C14 radiogenic dating were obtains of morrenic and lacustrine sediments. The river captures and the present hydrographic pattern of the Blanco river were defined about 2.000 years ago, during the Holocene, mainly due to tectonic factors and desglaciación processes on the Austral zone of Chile.

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Author Biographies

María Mardones, Universidad de Concepción (Chile)

Departamento de Ciencias de la Tierra, Facultad de Ciencias Químicas, Universidad de Concepción (Chile). 

Julius Jara, Universidad de Concepción (Chile)

Departamento de Ciencias de la Tierra, Facultad de Ciencias Químicas, Universidad de Concepción (Chile). 

José Vargas, Universidad de Concepción (Chile)

Departamento de Ingeniería Civil, Facultad de Ingeniería, Universidad de Concepción (Chile). 

Published

2007-12-30

How to Cite

Mardones, M. ., Jara, J., & Vargas, J. (2007). El patrón hidrográfico de la cuenca del río Blanco: control tectónico y geomorfológico. Revista De Geografía Norte Grande, (38), 79–98. https://doi.org/10.4067/S0718-34022007000200005

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