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Erosion on reservoir margins causes losses in the production of energy in Hydroelectric Power Plants (HPPs), making it necessary to implement control techniques that ensure the reduction in sediment deposits inside reservoirs. Among these techniques, geomats (geosynthetic erosion mats) are widely used to control erosion processes in slopes and watercourses. This material protects the margins both in the short and long term, contributing to strengthening the vegetation’s roots developed in the erosion areas. This paper studies the performance of geomats (with and without sack gabion) installed in six margin sections distributed in three experimental units of the Brazilian HPPs called Porto Colômbia and Volta Grande. The geomat performance was evaluated over four years of monitoring through a qualitative evaluation matrix and differential bathymetry. The influence of ultraviolet (UV) radiation on the degradation of geomats installed in each section (natural conditions), as well as on geomat ultraviolet-aging samples in the laboratory (accelerated conditions), was also evaluated using differential scanning calorimetry (DSC). The results showed no significant difference in performance between using the erosion control technique consisting only of geomats and the technique consisting of geomats and sack gabion. The highest bathymetric difference value obtained in the present study was 1.62 m in the experimental unit VG1, controlled with geomat without the application of sack gabion on the margin.
Marta da Luz; Maria Aparicio Ardila; Ricardo Dos Santos Junior; Clever Valentin; Marlon Schliewe; Arnaldo Coelho; Jefferson Lins da Silva. Geomats Used to Control Erosion on Reservoir Margins in Brazilian Hydroelectric Power Plants. Water 2021, 13, 1444 .
AMA StyleMarta da Luz, Maria Aparicio Ardila, Ricardo Dos Santos Junior, Clever Valentin, Marlon Schliewe, Arnaldo Coelho, Jefferson Lins da Silva. Geomats Used to Control Erosion on Reservoir Margins in Brazilian Hydroelectric Power Plants. Water. 2021; 13 (11):1444.
Chicago/Turabian StyleMarta da Luz; Maria Aparicio Ardila; Ricardo Dos Santos Junior; Clever Valentin; Marlon Schliewe; Arnaldo Coelho; Jefferson Lins da Silva. 2021. "Geomats Used to Control Erosion on Reservoir Margins in Brazilian Hydroelectric Power Plants." Water 13, no. 11: 1444.
Interception by vegetation is one of the main variables controlling hydrological and geo-environmental problems such as erosion, landslides and floods. Interception, along with precipitation and evapotranspiration, is required for the modeling of infiltration, percolation and runoff. Unfortunately, the measurement of interception in the field is time consuming, burdensome and subject to testing parameters with relatively high variability. In this context, experiments using rainfall simulators (RSs) have the potential to provide an alternative approach that addresses most of the limitations of field experiments. This paper presents a new approach to evaluate interception that combines a RS and the monitoring of the wetting front using pore-water pressure instrumentation at specific locations of the specimen. Two specimens are required, one with and another without vegetation. The proposed approach was applied to Paspalum notatum (bahiagrass) and a tropical soil. The results indicated an average interception of 5.1 mm of the simulated rainfall for a slope at 15 degrees, rainfall intensity of 86 mm h−1, and duration of 60 min. Furthermore, the vegetation decreased the surface runoff that contributes to erosion. The proposed method will enable studies on the interception mechanisms and the various involved variables, with benefits to the modeling of soil-vegetation-atmosphere interaction.
Thiago Mendes; Roberto Alves; Gilson Gitirana; Sávio Pereira; Juan Rebolledo; Marta da Luz. Evaluation of Rainfall Interception by Vegetation Using a Rainfall Simulator. Sustainability 2021, 13, 5082 .
AMA StyleThiago Mendes, Roberto Alves, Gilson Gitirana, Sávio Pereira, Juan Rebolledo, Marta da Luz. Evaluation of Rainfall Interception by Vegetation Using a Rainfall Simulator. Sustainability. 2021; 13 (9):5082.
Chicago/Turabian StyleThiago Mendes; Roberto Alves; Gilson Gitirana; Sávio Pereira; Juan Rebolledo; Marta da Luz. 2021. "Evaluation of Rainfall Interception by Vegetation Using a Rainfall Simulator." Sustainability 13, no. 9: 5082.
Laboratory apparatuses for the analysis of infiltration and runoff enable studies under controlled environments and at reduced costs. Unfortunately, the design and construction of such systems are complex and face difficulties associated with the scale factor. This paper presents the design, construction, and evaluation of a portable rainfall and runoff simulator. The apparatus allows the evaluation of unsaturated soils with and without vegetation cover, under a wide range of simulation scenarios. The apparatus also enables the control of the intensity, size, and uniformity of simulated raindrops for variable surface slope, specimen thickness, and length conditions. The monitoring of the volumetric water content and matric suction and a rigorous computation of water balance are ensured. The obtained results indicate that the automated rainfall generator produces raindrops with Christiansen uniformity coefficients higher than 70%, and with an adequate distribution of raindrop sizes under a range of rainfall intensities between 86.0 and 220.0 mm h−1. The ideal rainfall generator conditions were established for a relatively small area equal to or lower than 1.0 m2 and considering rainfall events with return periods of 10 to 100 years.
Thiago Mendes; Sávio Pereira; Juan Rebolledo; Gilson Gitirana; Maria Melo; Marta Luz. Development of a Rainfall and Runoff Simulator for Performing Hydrological and Geotechnical Tests. Sustainability 2021, 13, 3060 .
AMA StyleThiago Mendes, Sávio Pereira, Juan Rebolledo, Gilson Gitirana, Maria Melo, Marta Luz. Development of a Rainfall and Runoff Simulator for Performing Hydrological and Geotechnical Tests. Sustainability. 2021; 13 (6):3060.
Chicago/Turabian StyleThiago Mendes; Sávio Pereira; Juan Rebolledo; Gilson Gitirana; Maria Melo; Marta Luz. 2021. "Development of a Rainfall and Runoff Simulator for Performing Hydrological and Geotechnical Tests." Sustainability 13, no. 6: 3060.
At the beginning of this century, due to well-established Brazilian recycling processes, geosynthetics’ manufacturers started to use recycled poly(ethylene) terephthalate (PET) yarns/filaments (from PET bottles) in geotextile production. Despite the fact that recycled products cannot act as reinforcement functions, geosynthetics are constantly under sustained tensile load and experiences evolutions of the axial strain (creep behaviour). Thus, this study aims to assess the influence of the structure of (needle-punched) non-woven geotextiles manufactured using recycled PET yarns on their creep behaviour. Two geotextiles with different fibre/filament production processes were investigated (short-staple fibres—GTXnwS—and continuous filaments—GTXnwC). Unconfined in-isolated conventional and accelerated (using the stepped isothermal method) creep tests were performed at 5%, 10%, 20%, 40% and 60% of geotextiles’ ultimate tensile strength. The geotextiles investigated provided similar creep behaviour to geotextiles manufactured with virgin PET material. The standard deviation of the axial strain tends to increase as the load level applied increase. The structure of the GTXnwS harms its tensile –strain behaviour, promoting axial deformation under sustained loads, at least 50% higher than GTXnwC for the same load level applied. The influence of the load level and geotextile structure in the initial axial strain is pointed out. Long-term predictions based on creep tests performed using the stepped isothermal method have proven to be conservative and they must be restricted for quality control of the investigated geotextiles.
Mateus Fleury; Lucas Nascimento; Clever Valentin; Jefferson Lins da Silva; Marta Luz. Creep Behaviour of Recycled Poly(ethylene) Terephthalate Non-Woven Geotextiles. Polymers 2021, 13, 752 .
AMA StyleMateus Fleury, Lucas Nascimento, Clever Valentin, Jefferson Lins da Silva, Marta Luz. Creep Behaviour of Recycled Poly(ethylene) Terephthalate Non-Woven Geotextiles. Polymers. 2021; 13 (5):752.
Chicago/Turabian StyleMateus Fleury; Lucas Nascimento; Clever Valentin; Jefferson Lins da Silva; Marta Luz. 2021. "Creep Behaviour of Recycled Poly(ethylene) Terephthalate Non-Woven Geotextiles." Polymers 13, no. 5: 752.
The use of polymeric materials such as geosynthetics in infrastructure works has been increasing over the last decades, as they bring down costs and provide long-term benefits. However, the aging of polymers raises the question of its long-term durability and for this reason researchers have been studying a sort of techniques to search for the required renewal time. This paper examined a commercial polypropylene (PP) nonwoven geotextile before and after 500 h and 1000 h exposure to ultraviolet (UV) light by performing laboratory accelerated ultraviolet-aging tests. The state of the polymeric material after UV exposure was studied through a wide set of tests, including mechanical and physical tests and thermoanalytical tests and scanning electron microscopy analysis. The calorimetric evaluations (DSC) showed distinct behaviors in sample melting points, attributed to the UV radiation effect on the aged samples. Furthermore, after exposure, the samples presented low thermal stability in the thermomechanical analysis (TMA), with a continuing decrease in their thicknesses. The tensile tests showed an increase in material stiffness after exposition. This study demonstrates that UV aging has effects on the properties of the polypropylene polymer.
Clever Valentin; Marcelo Kobelnik; Yara Franco; Fernando Lavoie; Jefferson Silva; Marta Luz. Study of the Ultraviolet Effect and Thermal Analysis on Polypropylene Nonwoven Geotextile. Materials 2021, 14, 1080 .
AMA StyleClever Valentin, Marcelo Kobelnik, Yara Franco, Fernando Lavoie, Jefferson Silva, Marta Luz. Study of the Ultraviolet Effect and Thermal Analysis on Polypropylene Nonwoven Geotextile. Materials. 2021; 14 (5):1080.
Chicago/Turabian StyleClever Valentin; Marcelo Kobelnik; Yara Franco; Fernando Lavoie; Jefferson Silva; Marta Luz. 2021. "Study of the Ultraviolet Effect and Thermal Analysis on Polypropylene Nonwoven Geotextile." Materials 14, no. 5: 1080.
Sedimentation is one of the major problems addressed by reservoir management, and requires extensive effort to control it. This paper aims to evaluate the efficiency of the soil–lime stabilization technique for reservoir shores. The treatment consisted of spraying hydrated lime in slurry form over the surface of a lateritic clay sample with 1, 2, and 4% lime solution and curing times of 1, 7, 28, and 56 days with air-drying and moist-room storage. In addition, a single test with less than 1% lime solution by weight percentage was carried out. The post-cured specimens were mapped with SEM and X-ray analyses. A wave flume test was performed in samples subjected to diverse conditions of lime content, type, and curing time. The results showed that the present technique produces a Ca-rich crust by carbonation rather than stabilizing it and that the lime content and type of curing generate improvements in soil loss reduction, but the curing time does not. The technique gave relative protection against water level variation and wave impacts, but it is necessary to consider a frequent application of lime on the lateritic soil.
Ricardo Moreira Vilhena; Márcia Maria Dos Anjos Mascarenha; Renato Resende Angelim; Tomás Da Rosa Simões; Renato Batista De Oliveira; Marta Pereira Da Luz. Evaluation of Lime-Treated Lateritic Soil for Reservoir Shoreline Stabilization. Water 2020, 12, 3141 .
AMA StyleRicardo Moreira Vilhena, Márcia Maria Dos Anjos Mascarenha, Renato Resende Angelim, Tomás Da Rosa Simões, Renato Batista De Oliveira, Marta Pereira Da Luz. Evaluation of Lime-Treated Lateritic Soil for Reservoir Shoreline Stabilization. Water. 2020; 12 (11):3141.
Chicago/Turabian StyleRicardo Moreira Vilhena; Márcia Maria Dos Anjos Mascarenha; Renato Resende Angelim; Tomás Da Rosa Simões; Renato Batista De Oliveira; Marta Pereira Da Luz. 2020. "Evaluation of Lime-Treated Lateritic Soil for Reservoir Shoreline Stabilization." Water 12, no. 11: 3141.
Controlling and preventing soil erosion on slope surfaces is a pressing concern worldwide, and at the same time, there is a growing need to incorporate sustainability into our engineering works. This study evaluates the efficiency of bioengineering techniques in the development of vegetation in soil slopes located near a hydroelectric power plant in Brazil. For this purpose, twelve different bioengineering techniques were evaluated, in isolation and in combination, in the slopes (10 m high) of two experimental units (approximately 70 m long each) located next to the Paraíba do Sul riverbanks, in Brazil. High-resolution images of the slopes’ frontal view were taken in 15-day interval visits in all units for the first 90 days after implantation, followed by monthly visits up to 27 months after the works were finished. The images were treated and analyzed in a computer algorithm that, based on three-color bands (red–green–blue scale), helps to assess the temporal evolution of the vegetative cover index for each technique adopted. The results showed that most of the solutions showed a deficiency in vegetation establishment and were sensitive to climatological conditions, which induced changes in the vegetation phytosanitary aspects. Techniques which provided a satisfactory vegetative cover index throughout the investigated period are pointed out.
Vinicius Vianna; Mateus Fleury; Gustavo Menezes; Arnaldo Coelho; Cecília Bueno; Jefferson Lins Da Silva; Marta Luz. Bioengineering Techniques Adopted for Controlling Riverbanks’ Superficial Erosion of the Simplício Hydroelectric Power Plant, Brazil. Sustainability 2020, 12, 7886 .
AMA StyleVinicius Vianna, Mateus Fleury, Gustavo Menezes, Arnaldo Coelho, Cecília Bueno, Jefferson Lins Da Silva, Marta Luz. Bioengineering Techniques Adopted for Controlling Riverbanks’ Superficial Erosion of the Simplício Hydroelectric Power Plant, Brazil. Sustainability. 2020; 12 (19):7886.
Chicago/Turabian StyleVinicius Vianna; Mateus Fleury; Gustavo Menezes; Arnaldo Coelho; Cecília Bueno; Jefferson Lins Da Silva; Marta Luz. 2020. "Bioengineering Techniques Adopted for Controlling Riverbanks’ Superficial Erosion of the Simplício Hydroelectric Power Plant, Brazil." Sustainability 12, no. 19: 7886.
Runoff apparatuses (RA) are developed to study infiltration, runoff generation, and erosion processes. Several RA designs are available, but limited attention has been given to the effects of the equipment scale, initial, and boundary conditions on measured runoff. This paper presents a model-based evaluation of RAs using a finite element solution for Richard’s equation and a novel ground surface boundary condition designed to accommodate unsaturated soil behavior. The hydraulic properties of two tropical soils were considered, with multiple combinations of initial water contents, specimen dimensions, and sloping angle. The numerical exercises indicate that soils with lower air-entry values require an equilibrium stage for the establishment of initial conditions. Testing protocols with equilibrium times of 48 hours are recommended. Moisture flow produced by gravity when sloping the specimen was shown to potentially affect surface conditions and, consequently, runoff. Testing specifications to minimize the effects of specimen sloping are presented. The runoff mechanism in an RA was shown to have up to three stages, all with clear physical meaning. The third stage is an undesirable consequence of the influence of the RA’s impervious bottom. The establishment of the minimum specimen thickness that prevents boundary effects was shown to have major importance to testing results.
Thiago Augusto Mendes; Gilson De Farias Neves Gitirana Jr.; Juan Félix Rodriguez Rebolledo; Emílio Farias Vaz; Marta Pereira da Luz. Numerical evaluation of laboratory apparatuses for the study of infiltration and runoff. RBRH 2020, 25, 1 .
AMA StyleThiago Augusto Mendes, Gilson De Farias Neves Gitirana Jr., Juan Félix Rodriguez Rebolledo, Emílio Farias Vaz, Marta Pereira da Luz. Numerical evaluation of laboratory apparatuses for the study of infiltration and runoff. RBRH. 2020; 25 ():1.
Chicago/Turabian StyleThiago Augusto Mendes; Gilson De Farias Neves Gitirana Jr.; Juan Félix Rodriguez Rebolledo; Emílio Farias Vaz; Marta Pereira da Luz. 2020. "Numerical evaluation of laboratory apparatuses for the study of infiltration and runoff." RBRH 25, no. : 1.
RESUMO Um sistema eficaz e robusto de tratamento de resíduos sólidos urbanos requer um modelo de previsão adequado para auxiliar seu gerenciamento. Neste trabalho foi realizada, utilizando séries temporais, a análise da projeção de geração dos resíduos sólidos no aterro do município de Aparecida de Goiânia, localizado no estado de Goiás. Para a compreensão da geração de resíduos foram analisadas as influências exercidas por variáveis climáticas e incentivos governamentais. O modelo que melhor se ajustou ao fenômeno estudado foi o autorregressivo integrado de média móvel sazonal (SARIMA), em decorrência da existência de sazonalidade na série temporal analisada. Como principal resultado, a previsão para a geração de resíduos sólidos urbanos em Aparecida de Goiânia projetou redução do volume produzido até 2018. A sazonalidade na geração de resíduos sólidos urbanos não ocorre por causa da influência de variáveis climáticas. A modelagem dos resíduos sólidos urbanos pode auxiliar na tomada de decisões e no gerenciamento da coleta, além de contribuir para o controle dos impactos ambientais.
Leonardo Rodrigues De Oliveira Merelles; Cláudio De Oliveira E Silva; Marta Pereira Da Luz; José Elmo De Menezes; Viviane De Souza Dias. Previsão de geração de resíduos sólidos para o aterro de Aparecida de Goiânia (GO) por séries temporais. Engenharia Sanitaria e Ambiental 2019, 24, 537 -546.
AMA StyleLeonardo Rodrigues De Oliveira Merelles, Cláudio De Oliveira E Silva, Marta Pereira Da Luz, José Elmo De Menezes, Viviane De Souza Dias. Previsão de geração de resíduos sólidos para o aterro de Aparecida de Goiânia (GO) por séries temporais. Engenharia Sanitaria e Ambiental. 2019; 24 (3):537-546.
Chicago/Turabian StyleLeonardo Rodrigues De Oliveira Merelles; Cláudio De Oliveira E Silva; Marta Pereira Da Luz; José Elmo De Menezes; Viviane De Souza Dias. 2019. "Previsão de geração de resíduos sólidos para o aterro de Aparecida de Goiânia (GO) por séries temporais." Engenharia Sanitaria e Ambiental 24, no. 3: 537-546.
The impact of wind waves is a process that affect reservoir shorelines, causing economic and environmental damage. The objective of this paper is to analyze the erosive potential of waves generated by winds at the shoreline of a large tropical reservoir of the Itumbiara Dam that stands along the Paranaiba River in the Midwest of Brazil. A GIS-based analysis was carried out using a wave fetch model tool (WAVE) developed by the US Geological Survey with wind data from a Doppler sensor (SODAR—SOnic Detection and Ranging) and an ultrasonic anemometer. A wave erosivity potential map was generated combining 16 fetch rasters from every 22.5° wind directions and was weighted according to its corresponding wind frequency over the rainy season. This result showed the critical areas which may have a high wave potential to increase sediment detachment along the reservoir shoreline. Finally, some of these high erosivity potential areas coincide with large erosions sites, which are detected by satellite imagery. This technique was capable of identifying the wave potential which can cause shoreline erosions and also contribute to reservoir management and support future works, including field experimental programs and shoreline erosion treatments.
Ricardo Moreira Vilhena; Márcia Maria Dos Anjos Mascarenha; Maurício Martines Sales; Patrícia De Araújo Romão; Marta Luz. Estimating the Wind-Generated Wave Erosivity Potential: The Case of the Itumbiara Dam Reservoir. Water 2019, 11, 342 .
AMA StyleRicardo Moreira Vilhena, Márcia Maria Dos Anjos Mascarenha, Maurício Martines Sales, Patrícia De Araújo Romão, Marta Luz. Estimating the Wind-Generated Wave Erosivity Potential: The Case of the Itumbiara Dam Reservoir. Water. 2019; 11 (2):342.
Chicago/Turabian StyleRicardo Moreira Vilhena; Márcia Maria Dos Anjos Mascarenha; Maurício Martines Sales; Patrícia De Araújo Romão; Marta Luz. 2019. "Estimating the Wind-Generated Wave Erosivity Potential: The Case of the Itumbiara Dam Reservoir." Water 11, no. 2: 342.
Global climate change, related to the greenhouse gases emission, impacts hydroelectric power generation mainly due to the increase in air temperature and changes in the precipitation patterns. As a consequence, it affects basin evapotranspiration process, runoff, sediment transport as well as evaporation of reservoirs. This study analysed the current and future Brazilian context of hydroelectric reservoirs and investigated the potential impacts of climate change on hydropower generation and possible mitigation adjustments, giving relevant examples from around the world. Moreover, it is key to consider other factors that influence the availability of water resources such as: (a) upstream development of reservoirs, mainly the development of agricultural systems, which can contribute to increased water demand; (b) changes in land use, which can have an impact on soil degradation and sediment transport. Hydroelectric dams are a possible alternative to mitigate the impacts of climate change considering that those impacts could generate the need of adaptive actions. The assessment of climate change impacts’ projections anticipates possible future scenarios and can assist in strategic planning together with the definition of adaptive operational policies.
Viviane De Souza Dias; Marta Luz; Gabriela M. Medero; Diego Tarley Ferreira Nascimento. An Overview of Hydropower Reservoirs in Brazil: Current Situation, Future Perspectives and Impacts of Climate Change. Water 2018, 10, 592 .
AMA StyleViviane De Souza Dias, Marta Luz, Gabriela M. Medero, Diego Tarley Ferreira Nascimento. An Overview of Hydropower Reservoirs in Brazil: Current Situation, Future Perspectives and Impacts of Climate Change. Water. 2018; 10 (5):592.
Chicago/Turabian StyleViviane De Souza Dias; Marta Luz; Gabriela M. Medero; Diego Tarley Ferreira Nascimento. 2018. "An Overview of Hydropower Reservoirs in Brazil: Current Situation, Future Perspectives and Impacts of Climate Change." Water 10, no. 5: 592.
Over the last few years, the operation of the Furnas Hydropower Plant (HPP) reservoir, located in the Grande River Basin, has been threatened due to a significant reduction in inflow. In the region, hydrological modelling tools are being used and tested to support decision making and water sustainability. In this study, the streamflow was modelled in the area of direct influence of the Furnas HPP reservoir, and the Soil and Water Assessment Tool (SWAT) model performance was verified for studies in the region. Analyses of sensitivity and uncertainty were undertaken using the Sequential Uncertainty Fitting algorithm (SUFI-2) with a Calibration Uncertainty Program (SWAT-CUP). The hydrological modelling, at a monthly scale, presented good results in the calibration (NS 0.86), with a slight reduction of the coefficient in the validation period (NS 0.64). The results suggested that this tool could be applied in future hydrological studies in the region of study. With the consideration that special attention should be given to the historical series used in the calibration and validation of the models. It is important to note that this region has high demands for water resources, primarily for agricultural use. Water demands must also be taken into account in future hydrological simulations. The validation of this methodology led to important contributions to the management of water resources in regions with tropical climates, whose climatological and geological reality resembles the one studied here.
Viviane De Souza Dias; Marta Luz; Gabriela M. Medero; Diego Tarley Ferreira Nascimento; Wellington Nunes De Oliveira; Leonardo Rodrigues De Oliveira Merelles. Historical Streamflow Series Analysis Applied to Furnas HPP Reservoir Watershed Using the SWAT Model. Water 2018, 10, 458 .
AMA StyleViviane De Souza Dias, Marta Luz, Gabriela M. Medero, Diego Tarley Ferreira Nascimento, Wellington Nunes De Oliveira, Leonardo Rodrigues De Oliveira Merelles. Historical Streamflow Series Analysis Applied to Furnas HPP Reservoir Watershed Using the SWAT Model. Water. 2018; 10 (4):458.
Chicago/Turabian StyleViviane De Souza Dias; Marta Luz; Gabriela M. Medero; Diego Tarley Ferreira Nascimento; Wellington Nunes De Oliveira; Leonardo Rodrigues De Oliveira Merelles. 2018. "Historical Streamflow Series Analysis Applied to Furnas HPP Reservoir Watershed Using the SWAT Model." Water 10, no. 4: 458.
Aline De Arvelos Salgado; Universidade Federal de Goiás; Agustina Rosa Echeverría; Fernanda Posch Rios; Patrícia Layne Alves Traldi; Marta Luz; Ciência E Tecnologia De Goiás Instituto Federal De Educação; Pontifícia Universidade Católica de Goiás. Impactos ambientais decorrentes da construção da usina hidrelétrica de batalha no Rio São Marcos: apreensão por parte dos moradores do entorno das obras. Revista Brasileira de Ciências Ambientais (Online) 2017, 113 -126.
AMA StyleAline De Arvelos Salgado, Universidade Federal de Goiás, Agustina Rosa Echeverría, Fernanda Posch Rios, Patrícia Layne Alves Traldi, Marta Luz, Ciência E Tecnologia De Goiás Instituto Federal De Educação, Pontifícia Universidade Católica de Goiás. Impactos ambientais decorrentes da construção da usina hidrelétrica de batalha no Rio São Marcos: apreensão por parte dos moradores do entorno das obras. Revista Brasileira de Ciências Ambientais (Online). 2017; (44):113-126.
Chicago/Turabian StyleAline De Arvelos Salgado; Universidade Federal de Goiás; Agustina Rosa Echeverría; Fernanda Posch Rios; Patrícia Layne Alves Traldi; Marta Luz; Ciência E Tecnologia De Goiás Instituto Federal De Educação; Pontifícia Universidade Católica de Goiás. 2017. "Impactos ambientais decorrentes da construção da usina hidrelétrica de batalha no Rio São Marcos: apreensão por parte dos moradores do entorno das obras." Revista Brasileira de Ciências Ambientais (Online) , no. 44: 113-126.
Soil erosion and deposition mechanisms play a crucial role in the sustainability of both existing reservoirs and newly planned projects. Soil erosion is one of the most important factors influencing sediment transport yields, and, in the context of existing reservoirs, the surrounding watersheds supply both runoff and sediment yield to the receiving water body. Therefore, appropriate land management strategies are needed to minimize the influence of sediment yields on reservoir volume and, hence, the capacity of power generation. In this context, soil erosion control measures such as buffer strips may provide a practical and low-cost option for large reservoirs, but need to be tested at the catchment scale. This paper represents a study case for the Itumbiara hydroelectric power plant (HPP) in Brazil. Four different scenarios considering radially planted buffer strips of Vetivergrass with widths of 20 m, 40 m, 100 m and 200 m are analyzed. A semi-distributed hydrological model, SWAT, was used to perform the simulations. Results indicate a reduction of sediments transported to the reservoir of between 0.2% and 1.0% per year is possible with buffer strip provision, and that this reduction, over the life of Itumbiara HPP, may prove important for lengthening the productivity of the plant.
Marta Luz; Lindsay C. Beevers; Alan J. S. Cuthbertson; Gabriela M. Medero; Viviane S. Dias; Diego T. F. Nascimento. The Mitigation Potential of Buffer Strips for Reservoir Sediment Yields: The Itumbiara Hydroelectric Power Plant in Brazil. Water 2016, 8, 489 .
AMA StyleMarta Luz, Lindsay C. Beevers, Alan J. S. Cuthbertson, Gabriela M. Medero, Viviane S. Dias, Diego T. F. Nascimento. The Mitigation Potential of Buffer Strips for Reservoir Sediment Yields: The Itumbiara Hydroelectric Power Plant in Brazil. Water. 2016; 8 (11):489.
Chicago/Turabian StyleMarta Luz; Lindsay C. Beevers; Alan J. S. Cuthbertson; Gabriela M. Medero; Viviane S. Dias; Diego T. F. Nascimento. 2016. "The Mitigation Potential of Buffer Strips for Reservoir Sediment Yields: The Itumbiara Hydroelectric Power Plant in Brazil." Water 8, no. 11: 489.
The lateritic gravel routinely used in the midwest region of Brazil for pavement construction is no longer found near the urban centers. Thus, there is an increasing need for studies of alternative materials to replace it. This study presents an evaluation of the use of fine quarry wastes. An experimental test asphalt pavement was built with conventional materials and a soil–fine quarry waste mixture. Field tests were conducted to assess the behavior of these materials. It was verified that this waste is able to provide the same performance levels for low-volume roads while offering environmental and economic advantages.
Lilian Ribeiro De Rezende; Leonardo Ramos Da Silveira; Weliton Lima De Araújo; Marta Luz. Reuse of Fine Quarry Wastes in Pavement: Case Study in Brazil. Journal of Materials in Civil Engineering 2014, 26, 05014003 .
AMA StyleLilian Ribeiro De Rezende, Leonardo Ramos Da Silveira, Weliton Lima De Araújo, Marta Luz. Reuse of Fine Quarry Wastes in Pavement: Case Study in Brazil. Journal of Materials in Civil Engineering. 2014; 26 (8):05014003.
Chicago/Turabian StyleLilian Ribeiro De Rezende; Leonardo Ramos Da Silveira; Weliton Lima De Araújo; Marta Luz. 2014. "Reuse of Fine Quarry Wastes in Pavement: Case Study in Brazil." Journal of Materials in Civil Engineering 26, no. 8: 05014003.