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Elaboração de chaves de classificação da ocupação do solo em imagens de satélite

Tese de mestrado em Engenharia Geográfica, apresentada à Universidade de Lisboa, através da Faculdade de Ciências, 2014 ; Esta dissertação descreve o trabalho desenvolvido no IFAP - Instituto de Financiamento da Agricultura e Pescas, I.P., no âmbito do Mestrado em Engenharia Geográfica. O trabalho incidiu essencialmente na integração e acompanhamento das atividades desenvolvidas na Secção de Parcelário, e teve...

THE ENVIRONMENTAL IMPACT OF USING COPPER SULPHATE TO AVOID GRAPEVINE POWDERY MI...

Copper-based fungicides have been used in vineyards throughout the world, for many decades to protect against downy mildew. However, their use results in an accumulation of Cu in surface soils which can potentially impact on the biological health of the soil and could be transported and stored in the sediments deposited close to valley bottoms. In Douro region, northern of Portugal, vineyards are located on ste...

GRAPEVINE CULTIVATION AND THE GEOCHEMISTRY OF ZINC: IMPACT ON THE ENVIRONMENTAL...

This study presents preliminary results of a research project that aims assessing the environmental impact of intensive grapevine cultivation in the Alto Douro wine region, a World Heritage Site. A total of 50 soil samples were collected from three nearby vineyards of different ages. Surface drainage of these vineyards discharges into an important water reservoir, the Varosa Dam. The dam collects water from two...

Urban geochemistry of lead in gardens, playgrounds and schoolyards of Lisbon, P...

To assess the impact of potentially harmful elements in soil/dust on the health of children that use urban recreational areas to play outdoors, an urban survey of Lisbon, the largest city in Portugal was carried out, collecting soils and dusts from public gardens, parks, playgrounds and schoolyards. An exposure and risk assessment study for the incidental soil/dust ingestion of lead was carried out based on U...

Role of the sediments of two tropical dam reservoirs in the flux of metallic el...

In tropical climates, the high rainfall and temperature, throughout the annual cycle, allow high leaching rates of metallic elements from the basin upstream, which accumulate in the reservoirs. However, the concentration of these elements in natural waters is usually lower than expected, due to the ease of adsorption and co-precipitation in solid phases. We have studied two tropical dam reservoirs in Brazil, Tr...

Aplicação de uma metodologia multidisciplinar para a caracterização da contamin...

Assessing the impact of metals loads and other contaminants in large freshwater...

The use of remote sensing to estimate water quality parameters, such as suspended sediments, metals and nutrients distribution, seems to be a useful technology to use as a preliminary study in large freshwater bodies. Empirical models based on the relationships between spectral measurements and water and sediments quality analytical data, will decrease the number of sampling sites in the basin, since remote se...

DVINE – The Douro vineyards, World Heritage Patrimony: Assessing the impact of ...

Port wine vineyards along the margins of the Douro River are socio-culturally important, as Port wine is a world class agricultural product. While the tradition and economic beneficts of the crop are considerable, the intensive use of fertilizers, fungicides and pesticides to disease control in the vineyard is corrently raising public concern. The principal aim of this project is to assess the effect of inten...

Geochemistry of metals in the bottom sediments of tropical dam reservoirs in Sa...

In tropical climates, the high rainfall and temperature, throughout the annual cycle, allow high leaching rates of metallic elements from the basin upstream, which accumulate in the reservoirs. However, the concentration of these elements in natural waters is usually lower than expected, due to the easiness of adsorption and co-precipitation in solid phases. We have studied two tropical dam reservoirs in Brazil...

Assessing the impact of metals loads and other contaminants in large freshwater...

The characterization of heavy metals and other polluted elements derived from active and abandoned mining sites and from agricultural over-erosion regions, is a complicate task due to the variable spatial distribution of metals and therefore, a diffuse contamination in the soils, freshwater systems and surrounding area. Traditionally, the evaluation of the degree of contamination in a drainage basin requires a ...