Relações Pedomorfogeológicas e Distribuição de Pedoformas na Estação Ecológica de Águas Emendadas, Distrito Federal

Abstract

The soil distribution model of the landscape of the Distrito Federal (DF) is influenced by the geomorphological partitioning and geological substrate. The in-depth understanding of pedoforms helps in detailed or semi-detailed soil surveys and mapping of a region. The available pedological mapping of the DF, established in 1978, scale 1:100.00, is still the main source of pedological information of the DF, however, often it cannot meet the needs of the various soil studies, due to the low scale. Thus, the purpose of this work was to study the soil-landscape relationships in a toposequence of the Estação Ecológica de Águas Emendadas - ESECAE, representative of relations among properties of the relief, parent material and soil classes in areas with presence of the three geomorphological units defined in the Distrito Federal, including the High Plateau unit, and making a pedoforms map in the area, by geoprocessing techniques. The soil distribution in the landscape was evaluated based on the soil genesis, geomorphology and geology relationships. For the development of this work, geological and geomorphological maps available from ESECAE were used, and Digital Terrain Model (DTM) and maps of geomorphological units, slope classes and geoform distribution were elaborated. Through data obtained from literature and field works, with the characterization of representative soil profiles along the toposequence studied, a model of soil-geomorphological relationship was established in the region. This led to the establishment of the relationships between soils and landscape forms and the mapping of pedoforms of the ESECAE. This pedoforms map provides data for detailed and semi-detailed soil surveys and mapping in areas with the presence of the geomorphological units of the Distrito Federal.