Percorrer por autor "Jordan, Antonio"
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- Classification of landforms in Southern Portugal (Ria Formosa Basin)Publication . Granja-Martins, Fernando M.; Fernandez, Helena; MGP Isidoro, Jorge; Jordan, Antonio; Zavala, LorenaA Geographic Information Systems-based tool is used for macro-landform classification following the Hammond procedure, based upon a Digital Terrain Model (DTM) created from ordinary Kriging. Gentle slopes, surface curvature, highlands and lowlands areas are derived from the DTM. Combining this information allows the classification of terrain units (landforms). The procedure is applied to the Ria Formosa basin (Southern Portugal), with five different terrain types classified (plains, tablelands, plains with hills, open hills and hills).
- Soil erosion, Serra de Grandola (Portugal)Publication . Fernandez, Helena; Granja-Martins, Fernando M.; MGP Isidoro, Jorge; Zavala, Lorena; Jordan, AntonioSoil erosion has long been the subject of attention for environmental management researchers because it implies the loss of a key natural resource for sustaining life. Several methodologies for soil erosion assessment have been developed; many of these are supported by Geographic Information Systems. This study aims to classify the susceptibility of rainfall-induced erosion at the Serra de Grandola (Portugal), based on the Priority Actions Programme/Regional Activity Centre guidelines for mapping soil erosion on the Mediterranean coast. Results show a low-to-moderate susceptibility to rainfall-induced erosion in the lowlands, becoming moderate to high in the highlands of the Serra de Grandola.