Abstract

MARTINEZ ARDILA, Néstor Javier  and  VARGAS TEJEDOR, Seiry Soleny. Geomorphological Mapping of Cesar Department, Colombia: An Application of the IGAC Methodology. Rev. cartogr. [online]. 2022, n.105, pp.7-30.  Epub Oct 10, 2022. ISSN 2663-3981.  https://doi.org/10.35424/rcarto.i105.1071.

The Agrology Subdivision of the Agustín Codazzi Geographical Institute (IGAC), through the Internal Interpretation Working Group, carried out the 1:25.000 scale geomorphological mapping of the Department of Cesar, Colombia, following the methodology proposed by IGAC, which is based on a hierarchical geomorphological classification used for soil surveys. The methodology applied in the geomorphological mapping process for soils provides a technical reference that allows to identify and delimitate geoforms in a standardized way of semi-detailed scale for the different areas in the Cesar Department. Therefore, for this interpretation, digital stereoscopy techniques were used from photogrammetric and Orthophoto mosaic blocks generated with aerial photographs. Likewise, as from products obtained from Digital Elevation Models (DEM), basic and thematic cartography and multispectral images, were provided by the IGAC National Satellites Images Bank. The geomorphological zoning revealed 5 geomorphological landscapes: The High-elevation Mountain, the foothills located at its base, the hills formed by scattered low reliefs, the Valley with its elongated alluvial deposits and the Plain formed by extensive alluvial planes associated with the Magdalena River. The geoforms identified are mainly composed by transported clastic sediments and alterites from different types of rocks. The arrangement of the current geographical relief is strongly related with the Quaternary climate changes, especially in the Holocene, due to the changes in sea level that affected the Colombian Caribbean Region.

Keywords : Geomorphology; soils; Mapping; Digital Stereoscopy; Cesar Department.

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