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Vol 16, No 4 (2021)

In this map there are three watershed limits highlighted that were the subject of research aimed at comparing climate change responses in the smaller unit known as Verde River Basin using two hydrological models: Variable Infiltration Capacity (VIC) and Soil and Water Assessment Tool (SWAT). This basin is the headwater of the Grande River Basin (GRB), southern Minas Gerais state, Brazil. Results indicate an overall consensus among all climate models of a projected maximum and minimum temperature increase in the study area.

Source: CARVALHO, V. S. O. et al. Impact of climate change on monthly streamflow in the Verde River Basin using two hydrological models. Rev. Ambient. Água, Taubaté, vol. 16 n. 4, p. 1-17, 2021. doi:10.4136/ambi-agua.2683

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Vol 16, No 3 (2021)

The map shows the average annual sediment yield map (ton/ha.year) of the Indaia river basin in Minas Gerais, Brazil. This research analyzed the sediment yield generated by water erosion in this basin from 1988 to 2017, applying the SWAT hydrological model. The results provided insights into identifying areas that contribute most to the sediment yield in the basin, that is, the source areas.

Source: SIMÕES, K. et al. Application of the SWAT hydrological model in flow and solid discharge simulation as a management tool of the Indaia River Basin, Alto São Francisco, Minas Gerais. Rev. Ambient. Água, Taubaté, vol. 16 n. 3, p. 1-18, 2021. doi:10.4136/ambi-agua.2694

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Vol 16, No 2 (2021)

These maps show the residence time (RT) isolines in the Mundaú/Manguaba Lagoon Estuary Complex (CELMM), located on the coast of Alagoas state, Brazil. These isolines are associated with wind and freshwater discharge and affect water renewal processes as well as salinity levels and water temperature. As shown in the map, the region near the inlets and in the channel’s residence time was low and less than 10 days. In the back area of the lagoon, the residence time is high with a significant spatial variation. These areas of low circulation are important to identify since they are potentially susceptible to pollutant accumulation.

Source: CUNHA, C. L. N. et al. Effects on circulation and water renewal due to the variations in the river flow and the wind in a Brazilian estuary lagoon complex. Rev. Ambient. Água, Taubaté, vol. 16 n. 2, p. 1-18, 2021. doi:10.4136/ambi-agua.2600

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Vol 16, No 1 (2021)

The Permanent Preservation Area (PPA) Water index is intended to assess the level of degradation of urban water resources. Its unique feature is not to employ water quality monitoring data, usually unavailable in developing countries. In contrast, it employs easy-to-apply innovative territorial information available in existing databases. The example presented in the map shows the result of PPA Water Index applied to the municipality of Fortaleza, CE, Brazil, categorized in five PPA management levels: Unconcerned (red), Inefficient (orange), Regular (yellow), Concerned (light green), and Efficient (dark green) management of PPAs.

Source: VASCONCELOS, F. D. M. et al. Quality index of permanent preservation areas of urban water resources: PPAWater. Rev. Ambient. Água, Taubaté, vol. 16 n. 1, p. 1-16, 2021. doi:10.4136/ambi-agua.2589


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Vol 15, No 6 (2020)

The results presented in this figure are based on research aimed at investigating the correlation between the disinfection performance with the factors contact time t and residual chlorine CR in a long period of time (2 years) enabling to provide insights into the possible effects of the different seasons and related climatic conditions over this process. More specifically, the figure shows the experimental correlation between the efficiency ratio of E. coli removal by disinfection (Eo/E) with the product of chlorine residual with the contact time (CR .t).

Source: BONI, M. R. et al. Study of the performance of disinfection with sodium hypochlorite on a full-scale sewage treatment plant. Rev. Ambient. Água, Taubaté, vol. 15 n. 6, p. 1-8, 2020. doi:10.4136/ambi-agua.2652

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Vol 15, No 5 (2020)

This figure shows the reduced pressure at sea level and surface wind climatology data (10-year mean) in the Brazilian coast as a component of a research that aims at showing the semi-systematic methodology to analyze aspects usually present in oil spill modeling and environmental impact assessment. The semi-systematic approach seeks to identify and understand all potentially relevant research traditions that have implications for the studied topic, in this case, preventing the impacts of oil spill from offshore exploration in the Brazilian coast.

Source: ZACHARIAS, D.C. et al. Brazilian offshore oil exploration areas: an overview of hydrocarbon pollution. Rev. Ambient. Água, Taubaté, vol. 15 n. 5, p. 1-20, 2020. doi:10.4136/ambi-agua.2569

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Vol 15, No 4 (2020)

The figure shows the mechanisms associated with the synthesis of a nanocomposite of manganese ferrite graphene (MnFe2O4-G) that are likely to interact with Escherichia coli cell structures, resulting in damage and their death and, therefore, demonstrating its potential use in water and wastewater treatment processes. For more information on these six mechanisms please read the manuscript.

Source: SOLETTI, L.S. et al. Manganese ferrite graphene nanocomposite synthesis and the investigation of its antibacterial properties for water treatment purposes. Rev. Ambient. Água, Taubaté, vol. 15 n. 4, p. 1-12, 2020. doi:10.4136/ambi-agua.2515

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Vol 15, No 3 (2020)

The graphs show the result of a mathematical model applied to estimate a better composition of fermentation medium to maximize lactase production by Saccharomyces fragilis IZ 275. These graphs show regions with maximum β-galactosidase activity associated with different combinations of cheese whey and sucrose, yeast extract and sucrose, peptone and sucrose, yeast extract and cheese whey, peptone and cheese whey, and peptone and yeast extract values. These results point toward two insights: (1) the variables studied are critical for lactase production by Saccharomyces fragilis IZ 275; and, (2) cheese whey, a by-product of the milk and dairy industry is an important medium for the growth of yeast.

Source: BOSSO, A. et al. Lactase production by Saccharomyces fragilis IZ 275 using different carbon sources. Rev. Ambient. Água, Taubaté, vol. 15 n. 3, p. 1-13, 2020. doi:10.4136/ambi-agua.2474

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Vol 15, No 2 (2020)

This research intended to discuss methods to simulate characteristic hydraulic times (CHT) in a natural body with focus on Residence Time, Times of Renewal Rates and Water Age. The water body chosen is the Patos Lagoon located in southern Brazil considered the largest choked coastal lagoon in the world with over 300 km in length and an average width of 40 km. The figure shows the results of Water Age simulation for dry and wet seasons. The results show clearly the influence of river inflows in the northern part, and the influence of tides in the southern part.

Source: AGUILERA, L. et al. On characteristic hydraulic times through hydrodynamic modelling: discussion and application in Patos Lagoon (RS). Rev. Ambient. Água, Taubaté, vol. 15 n. 2, p. 1-20, 2020. doi:10.4136/ambi-agua.2456

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Vol 15, No 1 (2020)

This map shows the distribution of biogas energy potentials for sewage treatment plants (STP) in the state of Paraná in the southern region of Brazil. The results of this research showed that 19 STP units presented a biogas energy potential above 100 GJ d-1 and 124 units a potential below 30 GJ d-1. The location of these units and associated biogas energy potential make it possible to assemble strategic plans for future investments in the energy recovery of the by-products of STPs.

Source: LOPES, L. S. et al. Energy potential of biogas and sludge from UASB reactors in the State of Paraná, Brazil. Rev. Ambient. Água, Taubaté, vol. 15 n. 1, p. 1-15, 2020. doi:10.4136/ambi-agua.2398


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Vol 14, No 6 (2019)

The figure shows a shaded relief geological map of a portion of the Sanfranciscana Basin underneath which is located the Urucuia aquifer, the main focus of this research. In the figure, it is highlighted the area modeled with boundary conditions, climatological and groundwater observation stations, and stratigraphic wells. Based on the simulation of groundwater flow in steady-state, the results of this research point to a greater impact on surface water caused by a reduction in groundwater storage and related river base flow.

Source: OLIVEIRA, L. T. et al. Analysis of the long-term effects of groundwater extraction on the water balance in part of the Urucuia Aquifer System in Bahia - Brazil. Rev. Ambient. Água, Taubaté, vol. 14 n. 6, p. 1-15, 2019. doi:10.4136/ambi-agua.2390

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Vol 14, No 5 (2019)

These maps show the distribution of heavy rainfall in Brazil based on a 5-year return period. These results were obtained from IDF (intensity-duration-frequency of heavy rain) relationships of gauge stations in the Brazilian territory. The map in the top left shows heavy rainfall with 5-minute duration. The one to the right shows 30-minute duration. The one at the bottom left shows 60-minute duration and the last one to the right 120-minute duration. According to these results, the highest values are concentrated in the Amazon region and in the southern part of the country and the lowest in the semi-arid region in the northeast. These estimates are important for the design of micro-drainage structures preventing them from being damaged by heavy rainfall events.

Source: SOUZA, G. R. de. et al. Heavy rainfall maps in Brazil to 5 year return period. Rev. Ambient. Água, Taubaté, vol. 14 n. 5, p. 1-10, 2019. doi:10.4136/ambi-agua.2403

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Vol 14, No 4 (2019)

With the goal of assessing possible impacts of fish farming in great-volume cage systems on the water quality of a reservoir, the authors provided abiotic data from 72 samples obtained before and after farming site implementation. The figure shows the principal components analysis results for seven limnological variables. The highest dissolved oxygen (OD) concentrations were observed before the fish farm became operational. During the post-production period, the highest phosphorous (PT) and ammonium (NH4) concentrations were observed as well as high conductivity and turbidity values. Authors concluded that fish farming in cage systems located in Solteira Island Reservoir, Brazil, caused significant temporal and sudden spatial changes in water physical and chemical variables.

Source: ROSINI, E. F. et al. Water quality in Ponte Pensa Aquaculture Park, Solteira Island Reservoir, SP, Brazil, where fish are cultivated under great-volume cage system. Rev. Ambient. Água, Taubaté, vol. 14 n. 4, p. 1-14, 2019. doi:10.4136/ambi-agua.2382

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Vol 14, No 3 (2019)

This research is based on the evidence that the extract of Moringa Oleífera Lam has shown excellent performance for water clarification, reaching 90-94% of turbidity removal. In order to verify such potential, this study focused on applying a hybrid treatment system to the removal of reactive dye Blue 5G from aqueous solutions. This figure shows the surface response for the concentration of residual iron. This surface shows that the lowest values for the concentration of residual iron are achieved when a high dose of aqueous extract of Moringa Oleífera Lam is used and low values of electric current intensity are employed.

Source: SANTOS, B. S. de. et al. Continuous electrochemical reactor improved by the addition of Moringa oleífera lam extract: optimization of operational conditions for Blue 5G dye removal. Rev. Ambient. Água, Taubaté, vol. 14 n. 3, p. 1-14, 2019. doi:10.4136/ambi-agua.2290

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Vol 14, No 2 (2019)

In a review about the use of isoscapes for natural resource management in the Brazilian context, which has high biological diversity and landscape heterogeneity, the authors present this figure that shows mean annual precipitation δ18O (A) and δ2H (B) isoscapes. As this figure presents, the average rates show a significantly lower spatial variation in comparison to temporal and spatial fluctuation found by other studies at a state level. Therefore, developing precipitation isoscape models specific for Brazil is imperative, since current global models mask part of the natural variations of isotopic ratios.

Source: SENA-SOUZA, J. P. et al. Background and the use of isoscapes in the Brazilian context: essential tool for isotope data interpretation and natural resource management. Rev. Ambient. Água, Taubaté, vol. 14 n. 2, p. 1-27, 2019. doi:10.4136/ambi-agua.2282

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Vol 14, No 1 (2019)

The figure shows the resulting morphometric characterization of Peixe river watershed derived from different digital elevation models generated from five elevation data sources (three from SRTM 90-meter resolution data and two from 1:100.000 scale topographic maps). Results indicated that SRTM-O, SRTM-TR, and CT-TR provided the incorrect generation of hydrography in the region of the São Franciscana Depression (flat region), observed by the diversion of main river and generation of the mouth in another basin, causing significant errors in the determination of the morphometric characteristics of the basin, mainly in the drainage area and length of the main river. On the other hand, SRTM-TRH and CT-TRH presented excellent performance and are indicated for on-site study.

Source: FICHER, K. N. et al. Assessment of digital elevation models to obtain morphometric characteristics in relief transition region. Rev. Ambient. Água, Taubaté, vol. 14 n. 1, p. 1-14, 2019. doi:10.4136/ambi-agua.2280


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Vol 13, No 6 (2018)

These maps show the variation of EI30 index that was computed as the product of total kinetic rainfall energy (EC) and maximum 30-min precipitation intensity (I30) in Mato Grosso State, Brazil. During the first and second EI30 periods (October-November and December-March, respectively) many agricultural activities occur in the State. The most critical period is October to February when activities such as tilling, sowing, and harvesting are concentrated. The third period (April-September) is the least critical because the majority of the soils are covered by the crop canopy.

Source: RAIMO, L. A. D. L. D. et al. Spatio-temporal variability of erosivity in Mato Grosso, Brazil. Rev. Ambient. Água, Taubaté, vol. 13 n. 6, p. 1-14, 2018. doi:10.4136/ambi-agua.2276

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Vol 13, No 5 (2018)

Domestic wastewater COD (Chemical Oxygen Demand) elimination using electrocoagulation is influenced by changes in current intensity, pH conditions and time. A three-dimension graphic visualization of the combination of two of these factors at a time is presented in this figure. Authors claim that this technique is more effective than biological processes for the removal of COD from domestic wastewater.

Source: ASCÓN, E. A. A. Elimination of chemical oxygen demand from domestic residual water by electrocoagulation with aluminum and iron electrodes. Rev. Ambient. Água, Taubaté, vol. 13 n. 5, p. 1-16, 2018. doi:10.4136/ambi-agua.2240

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Vol 13, No 4 (2018)

This graph shows the influence of rainfall on the seasonal variation in cadmium (Cd) concentration in water samples from five reservoirs (R) and an artesian well (home). Intensive farming using agrochemicals (fertilizers and pesticides) can increase heavy metal concentrations in the soil-water-plant system, especially in the case of elements poorly retained by the soil and easily lost to leaching.

Source: SILVA, L. S. et al. Heavy metals in waters used for human consumption and crop irrigation. Rev. Ambient. Água, Taubaté, vol. 13 n. 4, p. 1-10, 2018. doi:10.4136/ambi-agua.1999

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Vol 13, No 3 (2018)

These maps show the results of applying inverse distance weighting (IDW) interpolation technique of temperature (A), pH (B) and total dissolved solids -TDS (C) against the distribution of breeding sites and water reservoirs to determine how susceptible these areas were for schistosomiasis intermediate hosts colonization.

Source: BARBOSA, C. S. et al. Insalubrious touristic environments and schistosomiasis transmission in Pernambuco, Brazil. Rev. Ambient. Água, Taubaté, vol. 13 n. 3, p. 1-10, 2018. doi:10.4136/ambi-agua.2151

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Vol 13, No 2 (2018)

Map showing an area in central Mato Grosso State, Brazil, where albedo variation values of forest, burned vegetation, water, and crop areas were analyzed in this Amazon-Cerrado transition zone.

Source: FARIA, T. O. et al. Surface albedo in different land-use and cover types in Amazon forest region. Rev. Ambient. Água, Taubaté, vol. 13 n. 2, p. 1-13, 2018. doi:10.4136/ambi-agua.2120

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Vol 13, No 1 (2018)

Maps showing adequate areas for the cultivation of two varieties of eucalyptus obtained by the application of the Multi-Objective Land Allocation (MOLA) tool.

Source: FRAGA, M. S. et al. Climatic zoning for eucalyptus cultivation through strategic decision analysis. Rev. Ambient. Água, Taubaté, vol. 13 n. 1, p. 1-13, 2018. doi:10.4136/ambi-agua.2119


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Vol 12, No 6 (2017)

Maps of the upper Stör catchment including general location (A), elevation with gauging stations (B); soil (C); and land use (D).

Source: POTT, C. A. et al. Best management practices to reduce nitrate pollution in a rural watershed in Germany. Rev. Ambient. Água, Taubaté, vol. 12 n. 6, p. 888-901, 2017. doi:10.4136/ambi-agua.2099

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Vol 12, No 5 (2017)

Altitude and distribution of weather stations in the state of Paraná, Brazil

Source: SANTOS, L. C. et al. Space-time variability of evapotranspiration and precipitation in the State of Paraná, Brazil. Rev. Ambient. Água, Taubaté, vol. 12 n. 5, p. 743-759, 2017. doi: 10.4136/ambi-agua.2057

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Vol 12, No 4 (2017)

ASTER digital elevation model for the Tocantins State and spatial distribution of the rainfall stations used in the present study

Source: SILVA NETO, V. L. et al. Daily rainfall disaggregation for Tocantins State, Brazil. Rev. Ambient. Água, Taubaté, vol. 12 n. 4, p. 605-617, 2017. doi: 10.4136/ambi-agua.2077

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Vol 12, No 3 (2017)

Spatial distribution of hydrological stations and watersheds studied in La Guajira Peninsula (Colombia)

Source: DOMÍNGUEZ CALLE, E. A. et al. Objective assessment of ecosystem hydrological services in tropical areas: A Colombian experience in arid and semi-arid zones. Rev. Ambient. Água, Taubaté, vol. 12 n. 3, p. 365-379, 2017. doi: 10.4136/ambi-agua.2098

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Vol 12, No 2 (2017)

Influence of relief on H2S dispersion.

Source: AUGUSTO, M. al. Simulação numérica da dispersão do sulfeto de hidrogênio emitido por um reator UASB para tratamento de esgoto doméstico. Rev. Ambient. Água, Taubaté, vol. 12 n. 2, p. 215-225, 2017. doi: 10.4136/ambi-agua.1841

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Vol 12, No 1 (2017)

Test site to for the geo-inspired model of natural vector multi-agents corresponding to La Perdiz River Basin, Florencia city, Colombia.

Source: MILLAN ROJAS, E. E. et al. Natural vector multi-agents geo-inspired in environmental management. Rev. Ambient. Água, Taubaté, vol. 12 n. 1, p. 47-56, 2017. doi: 10.4136/ambi-agua.1912


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Vol 11, No 5 (2016)

Protocolo de avaliação rápida de pontos da bacia hidrográfica. Trechos impactados: 0 a 25 pontos; trechos alterados: 26 a 40 pontos e trechos naturais: 41 a 60 pontos.

Source: BAIÃO, C.F.P. et al. Avaliação de bacia hidrográfica por alunos do Ensino Fundamental: contribuição ao ensino dos recursos hídricos. Rev. Ambient. Água, Taubaté, vol. 11 (suplemento), p. 1056-1068, 2016. doi: 10.4136/ambi-agua.1895

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Vol 11, No 4 (2016)

Domain of models: (a) global HadGEM2 (resolution 140 x 208 km) and (b) regional RegCM4 (resolution 28 x 28 km) of tropical South America with emphasis on (c) the Brazilian Amazon region. Colors represent the topography (m) and blue contours show the hydrology (main rivers).

Source: ROSA, al. Erosividade da chuva em Rondon do Pará, PA, Brasil de 1999 a 2015 e projetada para 2035. Rev. Ambient. Água, Taubaté, vol. 11 n. 4, p. 1006-1021, 2016. doi:10.4136/ambi-agua.1956

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Vol 11, No 3 (2016)

Bathymetry used in computational modeling of the Santos Estuarine System water renewal.

Source: ROVERSI, F. et al. Análise da renovação das águas do Sistema Estuarino de Santos usando modelagem computacional. Rev. Ambient. Água, Taubaté, vol. 11 n. 3, p. 566-585, 2016. doi:10.4136/ambi-agua.1770


Vol 8, No 4 (2013)

Para celebrar 15 anos do Curso de Pós-Graduação em Ciências Ambientais da Universidade de Taubaté (UNITAU), o Conselho Editorial da Revista Ambiente & Água convidou o Coordenador e Vice-Coordenadora do Curso para editarem um número suplementar do volume 8, 2013 com os artigos mais significativos resultantes de dissertações dos últimos anos do curso.