Monitoramento das águas subterrâneas do aterro de resíduos da construção civil e inertes, no bairro Jd. Wenzel, em Rio Claro-SP

This work is proposed to evaluate the potential risk of an inert landfill in the city of Rio Claro (SP), and also suggest a source for the contamination. The study was proposed because it is known that there were legal technicalities greetings to guarantee the quality of groundwater. Given the requirements of the Environmental Company of São Paulo (CETESB) were installed monitoring wells in the area; sampled to groundwater and its contamination was found. In addition, we analyzed the main characteristics of the area, the arrangement and characteristics of the waste, the local geology and the hydrogeological system, so that I could find the source of contaminants, and predict the direction of dispersion even in groundwater. At the end of the work presents conclusions, recommendations and proposals for mitigating action

Radioatividade e hidroquímica em águas subterrâneas do município de Botucatu (SP)

The main objective of this study is to determine the activity of Po-210, Pb-210 and gross alpha/beta radioactivity in groundwater collected in Botucatu, municipality of the São Paulo state, Brazil. Samples were collected in wells to perform the radiochemical analysis. Most wells are registered in DAEE, Sabesp or CPRM. The activity of polonium was obtained by the method of alpha spectrometry, held in LABIDRO at UNESP, Rio Claro. All samples showed radioactivity values below the maximum allowed by WHO, that are: gross alpha radioactivity = 0,5 Bq/L, gross beta radioactivity = 1,0 Bq/L, Po210 = 0,2 Bq/L and Pb210 = 0,1 Bq/L. The results of hydrochemical analysis were compared with the 1469 Ordinance of the Health Ministry, and all values are bellow the maximum allowed. The data also allowed obtain the samples classification using the Piper diagram. The samples AAB, Quinta do Manacás, Faz. Quatro Irmãs, Sesi, Sitio São José and ITE are classified as calcic bicarbonate; the samples Staroup and Caio are potassic; the samples Banespa and BTC are bicarbonate and mixed interms of dissolved cations; Sitio das Palmeiras sample is sodium bicarbonate; the sample Faz. São Paulo is chlorinated calcic; the sample Sítio Btu-Pardinho chlorinated and mixed interms of dissolved cations

Avaliação das ocorrências de nitrato e fluoreto nas águas subterrâneas do Estado de São Paulo

Concerns about the quality of groundwater have been continuously rising, considering its importance for the public water supply in the State of São Paulo, and even more due to the impact that anthropic action has been causing to the original quality of that natural resource. It is extremely relevant to identify the contamination focuses along the aquifers of the State of São Paulo. This report aims to evaluate nitrates and fluorides concentrations along the aquifers present in the state, in order to identify places where change in the quality of groundwater is observed, through the comparison between measured concentrations and reference values, such as: “Intervention Value” (maximum allowed value) and “Alert Value” (attention required value). To perform this research, a full compilation and organization has been done on chemical analysis data from the “Sistema de Informações de Águas Subterrâneas - SIDAS”, made available by the “Divisão de Procedimentos de Outorga – DPO” of the “Departamento de Água e Energia Elétrica – DAEE”. This work has made possible the build-up of a database composed by 6,860 wells, with analytical data ready to be interpreted, containing information about water pH, electrical conductivity, hardness and chloride, iron, fluoride, nitrogen, nitrates and total dissolved solids concentrations. This database shows concentration data for nitrates (6,157 wells) and fluoride (3,316 wells). From this information, maps for nitrates and fluorides concentration distributions have been made, by each aquifer and each “Unidade de Gerenciamento de Recursos Hídricos – UGRHI”, which has enabled the identification of wells where the concentrations of these chemical compounds exceeds the reference values. Concerning nitrates, these analysis indicated the existence of contamination sources from rural and urban zones, mostly present in the west region... (Complete abstract click electronic access below)

Contribuição das águas subterrâneas para a vazão do Ribeirão Boa Vista ou Córrego do Lajeado

This paper aimed to give a contribution to improve water resources management, consists of the analysis of interaction among groundwater and streamflow, by through the analysis of the relationship between basic and total streamflow, based on measured hidrological data from Ribeirão Boa Vista or Córrego Lajeado. watershed. Comparisons among groundwaterflow in this basin with another one in Rio Corumbataí basin were made based on the specific basic flow, in order to verify the possibility of the utilization of measured hydrological data in other basins with similar geological characteristics and soil use and occupation. Based upon the comparisons that were made, specific basic flow does not represent a good tool for extrapolation of measured data, indicating that this comparison shall be weighted by others characteristics as permeability and thickness of geological formations. Finally, it was possible to conclude that basic flow may be considered as an additional parameter for analysis of hydrological and hydrogeological characteristics of a basin and to provide subsidies to release legal licenses for water resources uses. related to surface water as well as for groundwater and may also be used as a tool for consolidation of integrated management of water resources, that is considered as a necessary and essential practice to avoid conflicts between users of water resources in a river basin.

Simulação de contaminação de sedimentos e águas subterrâneas por gasolina e álcool: um estudo de monitoramento de variações das propriedades físico-químicas

Geophysics studies in areas impacted by petroleum derivatives describe abnormalities of both low and high electrical resistivity (the opposite of electrical conductivity), confirmed as contaminant phase by chemical analysis: this contradiction can be explained by degrading processes that naturally occur and create sub products that can change the environment conductivity. Monitoring the variation of the parameters mentioned serves as a comparative basis to the variation in geoelectrical parameters, which identified the correlation between the same contaminant parameters and the difference between their behavior studied apart, as well as its relations with the biodegradation process. The results are applied to the fuel distribution and storage sectors, leading to the diagnosis and monitoring of possible groundwater contamination scenarios, and the knowledge of the area exposure time to the contaminant, besides the better remediation alternative and impacts control. Among some conclusions, the most significant are the decrease in conductivity over time, so as the increase in Eh value in the gasoline contaminated tank, as well as the decrease in the pH value in the second tank with ethanol, which can be attributed to its degradation. Comparing the variations in both tanks, it is evident that Eh, pH and electrical conductivity do not behave temporally in a similar way, although some correlations between Eh and pH can be related.

Ocorrência de nitrato nas águas subterrâneas do Sistema Aquífero Bauru em áreas rurais

Pós-graduação em Geociências e Meio Ambiente - IGCE

Caracterização isotópica do CO2 dissolvido em águas subterrâneas no município de Paulínia, SP

Pós-graduação em Geociências e Meio Ambiente - IGCE

Memórias subterrâneas, histórias (re) visitadas: a contribuição metodologia da história oral em estudos de grupos étnicos

This article aims to reflect on the contribution of oral history in studies involving memory and identity of ethnic groups. Problematic issues here are part of the result of two recently completed researches, which consisted of reconstructing the memory of Afro-Brazilians from the methodology of oral history. These surveys were intended to transpose, into written language, memories transmitted by oral tradition and which was confined to family circles. The first was to investigate the process of identification and transmission of knowledge from a black cultural practice in the countryside of São Paulo (Piracicaba, Capivari, and Tietê), the Batuque of Umbigada, and the second to reconstruct the stories and culture of Afro-Brazilians in the city of Itu, São Paulo.

Comportamento dos radioisótopos 238U, 234U e da razão de atividade 234U/238U em águas subterrâneas extraídas de corpos graníticos fraturados da Suíte Intrusiva de Itu (SP)

O uso de radionuclídeos em hidrologia, como a concentração de urânio e a razão de atividades (234U/238U), tornou-se ultimamente uma ferramenta de grande importância nas pesquisas relacionadas à água subterrânea. Estes parâmetros têm sido usados para identificar os principais mecanismos de mobilização, precipitação e transporte dos isótopos de um aquífero, ou seja, esses isótopos têm sido empregados como traçadores para água. A área de estudo deste trabalho compreende os corpos graníticos fraturados da Suíte Intrusiva de Itu, que afloram a leste do Estado de São Paulo junto à Bacia Sedimentar do Paraná, fazendo parte da Bacia Hidrográfica do Médio Tietê. Os poços de onde foram coletadas as águas subterrâneas investigadas foram perfurados nos granitos desta Suíte, localizados nos municípios de Salto (poço YVC), Itu (HND), Itupeva (poço ITUP) e Indaiatuba (poços BDN 1 e BDN 2), sendo estes utilizados no abastecimento residencial ou para irrigação. As coletas foram mensais e o tempo de amostragem foi de um ano e meio com o objetivo de avaliar a sazonalidade destas águas. A técnica utilizada, para discriminar os isótopos de urânio dissolvidos, bem como para determinar sua razão de atividade (234U/238U), nas amostras das águas subterrâneas, foi a de espectrometria alfa. Os resultados mostram que os parâmetros físico-químicos e composição química da água exercem um papel muito importante no comportamento dos isótopos analisados. As importantes variações observadas tanto entre as águas de um mesmo poço, como também entre poços diferentes, mostram que os processos de recarga e/ou de interação rocha – água ocorrem de maneira distinta.

Estudio del desarrollo gonadal del Jurel dentón (Pseudocaranx dentex) asociado a jaulas de engorde de peces en aguas de Canarias

[ES] El jurel dentón Pseudocaranx dentex (Bloch & Schneider, 1801) es una especie habitualmente asociada al entorno de instalaciones comerciales de engorde de doradas Sparus aurata L., 1758 y lubinas Dicentrarchus labrax (L., 1758) en jaulas flotantes en las islas Canarias. Con el objetivo de conocer el potencial de esta especie para la acuicultura se ha llevado a cabo un estudio de su ciclo reproductivo anual. Durante un año se han recogido muestras de gónadas, evaluado variables morfométricas a partir de especímenes salvajes y registrado los valores de temperatura y fotoperiodo en el momento de los muestreos. Los análisis macroscópicos y microscópicos realizados de las gónadas, junto con la determinación mensual del índice gonadosomático (IGS) y del factor de condición (FC), han servido para establecer el ciclo anual de maduración de esta especie. El estadio de vitelogénesis avanzada fue observado entre mayo y noviembre, sugiriendo un prolongado periodo de desove para esta especie en aguas de las islas Canarias.