330 resultados para Ivan César Ribeiro


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Pós-graduação em Geociências e Meio Ambiente - IGCE

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Pós-graduação em História - FCHS

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This study evaluated environmental impacts at Meio Creek watershed, Leme, Sao Paulo, Brazil. A simplified environmental analysis index was applied correlating land use and occupation (vegetation elimination or modification, wildlife, color, smell, grease, oils, foams, larvae and red worms) with water quality parameters (conductivity, dissolved oxygen, pH and temperature). The simplified environmental analysis index showed that 27.8% visited places had a high or worrying environmental impact and 5.6% had a really high impact. As to the results of physical and chemical parameters, pH and conductivity values showed the conditions and standards that water Class 2 and 3 should have. These parameters were not the same for dissolved oxygen levels at most of the analyzed points. Despite the current environmental legislation at federal, state and municipal levels, Leme city does not have an effective environmental plan to control and protect springs and Meio Creek watershed and its tributaries.

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The objective of this study was to evaluate environmental impacts on the Ribeirão Preto basin in order to define the most degraded areas and their causes and to propose solutions and management strategies for them. An impacts indicator questionnaire was designed, that allowed us to establish a direct relationship between reactions achieved and environmental factors by attributing value to some impacting parameters obtained by simple visualization in the field. The questionnaire was applied at 22 points, based on the influence area of the sub-basin and variability in land use. It was determined that the main environmental impacts that affect the basin are in nature effluent wastewater released into water bodies, the disposal of waste and deforestation. These factors were mainly noticed near to Ribeirão Preto city (State of São Paulo), the most populated region. Such information provides subsidies necessary to environmental management in this basin to decreasing environmental degradation. Among the management strategies suggested, it is possible to highlight that related to the accomplishment of environmental legislation, recuperation of degraded areas and adequate treatment and disposal of effluents.

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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A study on means of developing of perception and reading of the form by the conception and development of a Teaching Methodology of Drawing with emphasis in its early stages, its development and application in the initial stages of the Design process, dissecting it as a mental and physical process. We will be addressing the contributions of Geometry as a mean of simplification of the reading and materializing configurations as some pointers for addressing the Drawing teaching in the reported course.

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Watersheds are considered important study units when it comes to environmental planning, with regard to the optimal use of water resources. Water scarcity is predicted and feared by many societies, and proves to be an increasingly tangible problem nowadays. Still from the perspective of extreme events, this dissertation considers the study of flood waves in the sub-basin of the stream Claro, which belongs to the Corumbataí watershed. - SP, since thay can also have devastating effects for the population, A Decision Support System for Flood Routing Analysis in Complex Basins, ABC 6 software was applied in order to obtain hydrographs and peak flows in the sub-basin of the stream Claro, for return periods of 10 and 100 years, aiming to comprise events of different magnitudes. The model Soil Conservation Service (SCS) and the triangular SCS hydrograph were adopted for the simulations. Simultaneously, the Kokei Uehara method was applied for the obtainment of peak flow values under the same conditions, seeking to compare results. Data collection was performed using geoprocessing tools. For data entry in ABC 6, the fragmentation of sub-basin of the stream Claro was necessary, which generated 7 small watersheds, in order to fulfill a software demand, as the maximum drainage area it accepts is 50km² for each watershed analyzed. For RT = 10 and 100 years, respectively, the results of peak flow with use of ABC 6 were 46.10 and 95.45 m³/s, while for Kokei Uehara method, the results were 47.17 and 65.26 m³/s. The adoption of a single value of discretization time for all watersheds was indicated as limitation of ABC 6, which interfered in the final results. Kokei method Uehara considered the sub-basin of the stream Claro as a whole, which reduced the error accumulation probability

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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

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O objetivo da seguinte pesquisa é analisar a diversidade e o desempenho do EDR (Escritório de Desenvolvimento Rural) da região de Ribeirão Preto nos períodos recentes, de 1995/1996 e 2007/2008, por meio do cálculo da PTF (Produtividade Total de Fatores), a partir dos dados obtidos no IEA (Instituto Econômico Agrícola) e no LUPA (Levantamento das Unidades de Produção Agropecuária)

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Water erosion is one of the main processes responsible for soil degradation, resulting in loss of parcels of land suitable for agriculture, to the loss of agricultural inputs and the resulting drift of pesticides and excess sediment to rivers, causing phenomena such as the siltation and eutrophication of water bodies. Such a scenario makes it necessary to perform work of a technical and scientific to provide subsidies to land-use planning, in order to protect natural resources biotic and abiotic. To develop this work is necessary to find a unit of analysis capable of integrating the different elements of the landscape, hydrosphere, atmosphere, biosphere and lithosphere. Therefore we adopt for this work the watershed as main unit studies. From this question, this project will focus on the assessment of surface water erosion through MEUPS (Equation Modified Universal Soil Loss) predictive model. With the aid of maps, remote sensing products, and the use of geotechnology, this study aims to evaluate for the for Natural Erosion Potential the basin of the Jacutinga river, located in Rio Claro - SP

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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The objectives of this study were to evaluate land use and occupation of Permanent Preservation Areas (PPA) as well as its use conflicts by TM (Thematic Mapper) image of the 2010 Landsat-5 satellite, according to the Forest Code. For that purpose, Geographic Information Systems in the Ribeirão Paraíso watershed, São Manuel, SP were used. The combination of Remote Sensing and Geographic Information System technologies allowed representation of spatial distribution of the landscape and data integration in the diagnosis of geographic interest. The 2010 mapping showed 12 use categories, and the sugar cane crop had the largest land occupation, 48.25% of the area. The areas of permanent preservation amounted to 925.74 ha, which is an ideal value based on the Brazilian legislation. Mapping of land use conflicts showed intensive anthropic actions going 80.13% forward on PPAs, with only 19.87% remaining forests, which highlights their negative impact and illegal situations in these areas.