Resumo

MARTINEZ GARCIA, Fidel  e  LOPEZ BLANCO, Jorge. Characterization of the environmental biophysical units of the Glacís de Buenavista, Morelos, by means of a geomorphogenetic approach. Invest. Geog [online]. 2005, n.58, pp.34-53. ISSN 2448-7279.

By means of applying a morphogenetic geomorphologic approach, the environmental biophysical units (EBU) of the Glacís of Buenavista volcanic-piedmont were delineated and characterized. The study area belongs to the Colotepec River Basin in the State of Morelos, Central Mexico. The criteria applied to delineate EBU were, in the first phase an analytic geomorphologic procedure and in the second phase, a synthetic one. The thematic maps of geology, climatology, edaphology, hydrology, and land use/cover were used. In addition, it was included the basic information of the EBU delineation process within a GIS and a CAD environment. A description of the 65 EBU units of the Glacis of Buenavista volcanic-piedmont is included. The study area (20,272 ha) was classified in seven categories according with its relief type, origin, lithology-age and geometric class of relief in: 1. Mountain-slopes of pyroclastic flows of Plio-Quaternary volcanic endogenous origin; 2. Hillslopes of pyroclastic flows of Plio-Quaternary volcanic endogenous origin; 3. General piedmonts of pyroclastic flows of Plio-Quaternary volcanic endogenous origin; 4. Summit interfluvial surfaces with adjacent barrancos of Plio-Quaternary volcanic endogenous origin; 5. Local piedmont of Quaternary accumulative alluvial exogenous origin; 6. Alluvial plains of Quaternary accumulative exogenous origin; and, 7. Barranco's hillslopes of denudational exogenous origin of Quaternary (Holocene) with marginal accumulative alluvial plains. The biophysical characteristics of the EBU and the present environmental situation of the study area were synthesised.

Palavras-chave : Environmental biophysical units; Morphogenetic units; Geomorphic Morphogenetic Mapping; Glacis of Buenavista; Central Mexico.