Abstract

BISPO, Polyanna da C.; VALERIANO, Márcio de M.  and  KUPLICH, Tatiana M.. Relationship between Caatinga vegetation and the local geomorphometric condition. Rev. bras. eng. agríc. ambient. [online]. 2010, vol.14, n.5, pp. 523-530. ISSN 1807-1929.  http://dx.doi.org/10.1590/S1415-43662010000500010.

The objective of this work was to assess the potential of geomorphometric variables, derived from SRTM (Shuttle Radar Topographic Mission) data, to help in identifying vegetation types in the Serra das Almas National Park (CE). A 1:100.000 survey vegetation map was used as reference and the geomorphometric variables (elevation, slope, aspect and profile and plan curvatures) were compared to the mapped units. The variables elevation, slope and profile curvature were shown as the most important for their high discrimination power of the vegetation types. Although geomorphometric data had strong potential for characterizing vegetation through map comparisons, the achieved thematic detail levels were under those of the reference map when data was analyzed under a numerical approach. It was concluded that geomorphometric data were important input for vegetation mapping, and should be employed together with currently used data.

Keywords : topography; forest; biome; SRTM; Serra das Almas.