Caracterização hidroquímica dos sistemas aquíferos Serra Geral e Guarani da sub-bacia do Rio Pardo e municípios adjacentes, no sudoeste do estado de São Paulo

The main purpose of this work is to evaluate the chemical composition of the groundwaters from Guarani Aquifer System and Serra Geral Aquifer System in the Rio Pardo basin, located at the southwestern of São Paulo state. To the hydrochemical characterization, physicalchemical analyses from 32 sampled wells were used. These results were plotted in Piper diagrams allowing the classification of groundwater as calcium or calcium-magnesium bicarbonate type and sodium bicarbonate type for both aquifer systems. Distribution of hydrochemical facies over the study area was obtained using Stiff diagrams. The groundwater can be classified, representing in this sequence its hydrochemical evolution. The recognized mechanisms responsible for groundwater evolution are dissolution of minerals magnesium, such as olivine, present in the basalt, dissolution of feldspars and removal of the carbonate cement of the sandstones mineral framework. Ionic exchange may represent an important processes in the groundwater evolution, responsible for the increase in the sodium concentration and decrease of calcium

Mapeamento da condutividade hidráulica da cobertura do aquífero Guarani, situado na bacia hidrográfica dos rios Jacaré-Guaçú e Jacaré-Pepira, na porção centro-norte do estado de São Paulo

Given the importance of preserving the water quality of the Guarani Aquifer, the work done in the hydrographic basin of the rivers Jacaré-Guaçú e Jacaré-Pepira, located in the central-northern São Paulo state, was made to map the hydraulic conductivity from the use of some empirical methods associated with granulometric analysis and in situ testing, specifically with the Guelph permeameter. All results were submitted to a correlation analysis and subsequently mapped using the methodology of minimum curvature, based on numerical techniques Spline. These procedures provide for studies of aquifer vulnerability and assist in decision making in environmental projects and guidelines for urban planning

Desenvolvimento e validação de uma técnica quantitativa de análise de imagem para avaliação do teste do cometa corado pela prata

The comet assay is a method of DNA damage analysis widely used to quantify oxidative damage, crosslinks of DNA, apoptosis and genotoxicity of chemicals substances as chemical, pharmaceuticals, agrochemicals products, among others. This technique is suitable to detect DNA strand breaks, alkali-labile sites and incomplete excision repair sites and is based on the migration of DNA fragments by microeletroforesis, DNA migrates for the anode forming a “tail”, and the formed image has the appearance of a comet. The slides can be stained with fluorescence or silver, having differences in the microscopy type used for the analysis and the possibility of storage of the slides, moreover, the first one is a stained-method with more difficulties of accomplishment. The image analysis can be performed by a visual way, however, there is a disadvantage as the subjectivity on the results, that can be minimized by an automated method of digital analysis. This process was studied in this report with the aim to perceive the validation of the digital analysis turning it a quantitative method with larger reproductibility, minimizing the variability and imprecision due to the subjective analysis. For this validation we selected 50 comets photographed in a standardized way and printed, afterwards, pictures were submitted to three experienced appraisers, who quantified them manually. Later, the images were processed by free software ImageJ 1.38x, printed and quantified manually by the same appraisers. The intraclass correlation was higher to comet measures after image processing. Following, an algorithm of automated digital analysis from the measures of the comet was developed; the values obtained were compared with those 12 estimated manually after the processing resulting high correlation among the measures. The use of image analysis systems increases ...(Complete abstract click electronic access below)

Estudo dos mixozoários (Myxozoa : Myxosporea) parasitos dos peixes characiformes Acestrorhynchus lacustris (Lütken, 1875) e Steindachnerina insculpta (Fernández-Yépez, 1948) coletados no Rio do Peixe, médio Rio Tietê, SP, Brasil

The São Paulo State has as one of its main rivers the Tietê, which is an extremely important source because of its biodiversity, use in navigation and mainly as direct supplier of water for thousands of people in the region. Currently, the biodiversity of marine and freshwater ecosystems has been threatened, primarily by environmental problems resulting from the degradation of ecosystems, an example is the stretch of the Middle Tietê River, where the Barra Bonita dam (SP) focused virtually the whole load organic effluents from the metropolitan region of São Paulo, leading to eutrophication with the loss of water quality. This basin is located in the Peixe’s River, a tributary of the Barra Bonita whose sources are on the slopes of the Cuesta de Botucatu, presenting an altitudinal gradient in a good state of conservation and water quality. From another perspective, the studies related to parasites and other pathogens of aquatic organisms have considerably increased the relevance, especially those hosts with potential for growing and marketing, given the significant increase these activities in Brazil and worldwide. Among the agents responsible for diseases in fish are the myxosporean, which can cause major economic damage, with high mortality ratios. Based on the above, this study evaluated the biodiversity of myxosporean parasites of two species of fish Acestrorhynchus lacustris and Steindachnerina insculpta. During the period January to November 2012, 40 specimens of Acestrorhynchus lacustris and 33 specimens of Steindachnerina insculpta were collected from the Peoxe’s river at four different points. The necropsies were performed and all organs were analyzed looking for myxosporean. Only the species Steindachnerina insculpta had their gills parasitized by two species of the genus Henneguya

Síntese de nanopartículas de prata suportadas sobre nanotubos de carbono de paredes múltiplas para eletrooxidação de benzeno

Silver nanoparticles (Ag) were deposited on multi-walled carbon nanotube by eletroless. The hybrid Ag/MWCNT was used in the modification of glassy carbon electrode (GC) surface. The electrochemical characterization confirmed the presence of Ag in the nanocomposite has been showed that the synthesis was successful. The GC electrode modified with Ag/MWCNT film was evaluated for electro-oxidation of benzene. The electrochemical behavior presented an improvement on the catalytic surface in relation to non-modified GC electrode. The anodic peak current increased the magnitude in three times when compared with the CG electrode modified only with MWCNT

Diversidade, alimentação e reprodução da ictiofauna do Ribeirão Claro e de uma lagoa marginal, Rio Claro, SP

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Avaliação da erosão hídrica, transporte de sedimentos e qualidade da água na bacia do córrego Monjolo Grande

Understanding the linkages between the natural elements is essential for being promoted the land use, occupation and sustainable management of environmental systems. Universal Soil Loss Equation (USLE), as a predictive model of erosion, is important to allowing the prevention of possible environmental impacts which may drastically interfere in natural or anthropic environments, as well as prevent potential financial wastes and even contribute to greater efficiency of agricultural production. This research will be working some USLE parameters, emphasizing topographic factor from Ribeirão Monjolo Grande watershed. Among the factors considered by the USLE, the Topographic Factor interferes directly in the erosive dynamic of a watershed because it involves variables related to hydrological processes that occur on it. In this research, were discussed different methods for obtaining the Topographic Factor (BERTONI e LOMBARDI NETO, 1985; MOORE e BURCH, 1986; DESMET E GOVERS, 1996) in GIS environment. After comparison between the methods, was indicated that best represents the conditions of geometry strand of the study area. Finally, other factors (R, K, C, P) considered by the USLE were obtained. The attainment of these parameters were guided by the use of geotechnologies, especially in Geographic Information Systems (GIS), with the assistance of secondary data and periodic field visits. The results obtained contributed to the understanding of hydrosedimentological dynamic in this area and serve as a viable strategy for studies of soil loss, aiming at developing consistent material for future researches about environmental planning and land management

Geoprocessamento na análise da vulnerabilidade ambiental desencadeada pela monocultura de cana-de-açúcar na bacia do distrito Santa Olímpia (Piracicaba/SP)

Sugar cane production is of the utmost importance to the economy of the entire Brazil, due to its multiple utility, being used as the raw material for the manufacture of various items, particularly, sugar and alcohol. In areas of sugarcane monoculture, the appropriate management of soils and water is essential, not only for the maintenance of the quality of the environment, but also for the quality of life of the population. Among the main impacts generated by the cultivation of sugar cane, stands out the withdrawal of the riparian forest, which is essential to the balance and maintenance of the ecosystem. Before that, the present work aimed at mapping the environmentally vulnerable areas in the basin of a tributary of the Corumbataí river, located in the district Santa Olímpia, in the city of Piracicaba-SP. For the purpose, techniques were used in Geoprocessing, aiming to produce thematic maps of Slope, for the Use and Occupation of Land, of Permanent Preservation Areas (APP), Soil and Geological of the basin of interest. From these mappings, the analysis was performed multi-criteria, which resulted in the Map of Environmental Vulnerability. This mapping environmental assessment of the study area, indicating proposals of practices for the management and conservation of soil and water resources, for the purpose of improving the environmental quality of the analyzed area. In this way, the research of this nature, may help in the decision-making on the part of the governmental bodies as well as civil society

Levantamento de animais silvestres atropelados em rodovias da região de Ribeirão Preto-SP nos anos de 2004 a 2006

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Biologia reprodutiva de Scinax fuscomarginatus, na represa do Ribeirão Lavapes, Botucatu, SP (Amphibia, Anura, Hylidae)

Diversos estudos sobre a biologia reprodutiva dos anfíbios anuros têm sido realizados. Com eles é possível compreender melhor a ecologia desses animais em seu ambiente natural. Desta forma, o presente trabalho tem por objetivo o estudo da biologia reprodutiva da espécie Scinax fuscomarginatus, visando analisar: a) o sítio e turno de vocalização; b) a influência dos fatores bióticos e abióticos na atividade reprodutiva da espécie; c) o comportamento reprodutivo e; d) a distribuição temporal e espacial da espécie. A área de estudos situa-se na represa do Ribeirão Lavapés, localizada na Escola do Meio Ambiente (22º 55’ 23’’S e 48º 27’ 28’’W), Botucatu/SP. A coleta de dados foi realizada de dezembro de 2008 a novembro de 2009. A atividade de vocalização de S. fuscomarginatus ocorreu de dezembro de 2008 a março de 2009. No período de abril a agosto de 2009 a espécie não vocalizou e nenhum indivíduo foi observado na área. A partir do início do mês de setembro a espécie voltou a vocalizar e a ser observada no local. Nos meses de outubro e novembro foi registrada a maior abundância de indivíduos em atividade de vocalização (n=100). O coro era iniciado antes do crepúsculo e o pico de atividade foi entre 20 h e 21 h. Os machos vocalizavam ao redor da represa, geralmente empoleirados na vegetação herbácea. A altura do poleiro variou entre 30 cm e 100 cm. Ressalta-se que muitos machos também foram observados vocalizando no chão. A maioria dos indivíduos observados estava no máximo a 400 cm de distância da margem, externamente ao corpo d’água, porém alguns machos vocalizavam a distâncias maiores. Os girinos de Scinax fuscomarginatus foram localizados nos microambientes de menor profundidade e onde havia maior quantidade de macrófitas e de vegetação ao redor da margem. Estes coexistiram com girinos de outras espécies e com possíveis... (Resumo completo, clicar acesso eletrônico abaixo)

Análise das alterações geomorfológicas decorrentes dos processos de urbanização na bacia hidrográfica do córrego Lavapés, em Rio Claro/SP

In the last 60 years, many Brazilian cities practically doubled their population contingent. As a result of this process, there was an increase on the occupation level on unstable areas, from a physical point of view, and on the anthropogenic interventions at the natural ambient, reorganizing the existent process and forms. Thus, this work shows the results of the analysis of geomorphological changes deriving from urbanization processes at the Lavapés Stream watershed, located at Rio Claro county (SP). The goal of this work was reached by means of historical-evolutionary geomorphological cartography. To achieve this result, it had been prepared geomorphological and land usage charts for the years of 1962, 1988 and 2010, and a declivity chart. Those scenarios have been analyzed from the point of view of the General Systems Theory. The results were attached into an urban use restrictions chart, which allowed identifying the areas that should not be occupied, by geomorphological view and by environmental law restrictions

Diagnóstico antropogeomorfológico em bacia hidrográfica urbana: o caso do Córrego do Jardim São João, Araras (SP)

Man can transform the nature according to their needs through technique which enables agriculture, cattle raising, constructions of buildings for housing, transport routes, etc. This action has brought significant transformations to the environment, and relief is one of the most changed elements, mainly at urban areas, which concentrates most of the Brazilian population. In these areas geomorphologic systems have undergone alterations in their flow of matter and energy by the action of man. Thus, it is possible o understand the action of man as geomorphologic action, nowadays, the tecnógeno, since the human action can interfere qualitatively and quantitatively in the input and output of these systems. The anthropic geomorphology has contributed to the analyses of the effects due to the urbanization at the form and at the geomorphologic process in the urban watersheds, indicating the transformations at the shape of the relief and the alterations due to the acceleration of the flow of matter and energy. From these questions, this study had the main diagnose the anthropogenic changes of the relief at the basin of Corrego do Jardim São João, Araras (SP), comparing two scenes, 1997 and 2006, through geomorphological mapping evolutionary in the area. The geomorphological feature altered at the basin are directly linked to the use of soil, mainly at the urban use, which caused effects in the relief at the studied area, making possible to define periods of the urban evolution and impacts caused by the urbanization. Among the changes it was found the decrease of the topographic breaks and at the riverbed channels, as the increase of the accumulation of the plain and riverbed terrace. The elaboration of a letter of the legal restrictions of the basin make possible to evaluate some of the environmental urban problems that occur, which are due to the occupation of the relief in the areas of permanent preservation that brings significant impacts to...

Levantamento florístico da mata ciliar do Ribeirão Lavapés em uma área urbana do município de Botucatu/SP

As matas ciliares representam importante ecossistema na natureza, formando um ecótono entre o ambiente aquático e o ambiente terrestre apresenta elevada diversidade tanto da flora quanto da fauna sendo importantes corredores ecológicos para diversas espécies. Além da sua importância ecológica as matas ciliares apresentam importante papel na manutenção da quantidade e qualidade da água, essenciais para nossa sobrevivência. Para que projetos de conservação e recuperação das florestas ciliares ocorram com sucesso, trabalhos envolvendo a população através da educação ambiental são de grande importância, principalmente quanto se trata de corpos d’agua que atravessam a cidade como é o caso do Ribeirão Lavapés

Modelagem do transporte de sedimentos na alta Bacia do Córrego Cachoeirinha (Rio Claro, SP) através do software Soil and Water Assessment Tool (SWAT)

This study aimed to simulate and evaluate the sediment transport in Upper Basin Stream Cachoeirinha in Rio Claro, SP, and compare the results with previous studies performed in the same basin. The modeling software used in this study was Soil and Water Assessment Tool (SWAT), which is a very comprehensive tool that discusses many physical processes. In this work, the hydrosedimentological processes were treated, aiming to understand the sediment production and transport. The Basin Stream Cachoeirinha has an area with predominantly agricultural use, especially sugar cane. The database for inclusion in software was constructed from the following elements: climatic, topographical, soil type and use and land cover of the area, also including the parameters of Modified Universal Soil Loss Equation (MUSLE). The analysis was conducted for a period of 16 years (1994-2010), which is the range of data available from CEAPLA. The results were analyzed in terms of annual runoff and sediment yield. The average sediment delivery in the simulation was 0.94 t/ha/year, while the maximum annual contribution was 7.28 t/ha/year

Simulação numérica de fluxo de águas subterrâneas na bacia do Rio Grande (BA)

The Urucuia Aquifer System represents a strategic water source in western Bahia. Its baseflow is responsible for the flow rate of the main tributaries of São Francisco river left bank in the dry season, including the Rio Grande, its main tributary in Bahia state. This river has a hydrological regime heavily affected by groundwater and is located in a region with conflicts about water resources. The aquifers geology is constituted by neocretacious sandstones of Urucuia Group subdivided in Posse Formation and Serra das Araras Formation. The embasement is formed by neoproterozoic rocks of Bambuí Group. This work focuses on an important tool application, the mathematical model, whose function is represent approximately and suitably the reality so that can assist in different scenarios simulations and make predictions. Many studies developed in this basin provided the conceptual model basis including a full free aquifer, lithological and hydraulical homogeneity in entire basin, null flux at plateau borders and aquifer base. The finite element method is the numerical method used and FEFLOW the computational algorithm. The simulated area was discretized in a single layer with 27.357,6 km² (314.432 elements and 320.452 nodes) totaling a 4.249,89 km³ volume. Were utilized 21 observation wells from CERB to calibrate the model. The terrain topography was obtained by SRTM data and the impermeable base was generated by interpolation of descriptive profiles from wells and electric vertical drilling from previous studies. Works in this area obtained mean recharge rates varying approximately from 20% to 25% of average precipitation, thus the values of model recharge zones varying in this range. Were distributed 4 hydraulic conductivity zones: (K1) west zone with K=6x10-5 m/s; (K2) center-east zone with K=3x10-4 m/s; (K3) far east zone with K=5x10-4 m/s; e (K4) east-north zone with K=1x10-5 m/s. Thereby was incorporated to the final conceptual model...