Eufran Ferreira do Amaral

Mosaico digital de aerofotos não-convencionais na avaliação de recursos naturais: estudo de caso

Pelo presente trabalho avaliou-se a utilizacao de aerofotos nao-convencionais na forma de mosaico digital, como ferramenta basica no levantamento de solos e seu uso. O aerolevantamento foi realizado em quatro microbacias do municipio de Guarapari, ES. Foram feitas oito faixas de sobrevoos fotograficos com recobrimento longitudinal de 60% e lateral de 40%. A partir da digitalizacao de fotografias com elementos no tamanho 9 x 9 cm na escala aproximada de 1:25.000, produziu-se um mosaico digital com o auxilio do software Visual Stitcher. Os mapas de solos e de uso da terra foram delineados sobre o mosaico georreferenciado, com a utilizacao de digitalizacao em tela do software Idrisi 32. O uso do mosaico digital facilitou e agilizou o processo de mapeamento dos solos e da delimitacao do uso da terra na area estudada.

ZONEAMENTO PEDOCLIMATICO DA CANA-DE-ACUCAR (Saccharum officinarum L.) NAS AREAS DESMATADAS DO MUNICIPIO DE CRUZEIRO DO SUL, ESTADO DO ACRE

The State of Acre in its scopethroughtheof Ecological and Economic Zoning has intensified the studies of soils, landscapes and climate, the latter through the Inventory of Gases of Greenhouse GasesEffect, this has made itallowed possible to advance in the studies focused on the pedoclimatic zoning of crops of agricultural interests iIn their deforested areas. The present study had as main objective to elaborate the pedoclimatic zoning for the sugar cane crop in the deforested areas of the municipality of Cruzeiro do Sul, using geoprocessing techniques associated with the features of the landscape. Through the use of geoprocessing techniques associated with the agricultural aptitude of soilsthe methodology classes of agricultural suitability of soils and climatic climatic conditions, It was decided that the

Morphological, physical and pedogenetic attributes related to water yield in small watersheds in Guarapari/ES, Brazil

Soil characteristics related to the genesis, land use and management are important factors in water dynamics in watersheds. This study evaluated physical, morphological and pedogenetic attributes related to water yield potential in small watersheds in Guarapari, ES, Brazil. The following representative profiles were selected, morphologically described and sampled in area of Atlantic Forest domain: Lithic Udifolists, Oxyaquic Udifluventes, Typic Paleudults, Typic Hapludults, Typic Hapludox, Oxic Dystrudepts and Typic Endoaquents. Samples were collected in the soil profiles for physical analysis. Measurements of field-saturated hydraulic conductivity and soil penetration resistance were perfomed in some profiles, which were under different uses. The Endoaquents of Limao Creek can be considered efficient as temporary water reservoirs. However, the use of artificial drainage tends to reduce this ef fect. Differential erosion was detected by the sand texture on the surface of the Typic Paleudults due to the low degree of clay flocculation, slope, high resistance to the penetration and low hydraulic conductivity of the Bt horizon, making it necessary to adopt soil management practices to increase the water infiltration. Under pasture, mainly in the cattle trails where the trampling is more intense, there was high resistance to penetration in the superficial layers of the Typic Hapludults. The Typic Hapludox have the greatest potential for water yield in the small watersheds because of its greater extent in the headwaters and their morphological and physical characteristics, which can result in increased aquifer recharge.

Uso de opalas biogênicas na identificação de sedimentos lacustres e marinhos

This study aimed to identify lacustrine or marine sediments based on biogenic opals (also known as spicules). The layers and horizons of a Humic Gley Thiomorphic soil in the Riacho catchment area, Aracruz, state of Espirito Santo, Brazil, were analyzed. Each soil sample was specifically treated to isolate the spicules, which were then identified by an electronic microscope. It was possible to verify the presence of lacustrine as well as marine spicules. Moreover, the shape of the opals provided information on the conditions of the geochemical environment and transport distance of the sediments.