Mestrado em Engenharia do Meio Ambiente (EEC)
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Navegando Mestrado em Engenharia do Meio Ambiente (EEC) por Por Orientador "Formiga, Klebber Teodomiro Martins"
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Item Modelagem e monitoramento hidrológico das bacias hidrográficas dos córregos Botafogo e Cascavel, Goiânia – GO(Universidade Federal de Goiás, 2015-04-28) Pereira, Tatiane Souza Rodrigues; Formiga, Klebber Teodomiro Martins; http://lattes.cnpq.br/0787413754235970; Formiga, KlebberTeodomiro Martins; Siqueira, Eduardo Queija de; Souza, Saulo Bruno Silveira e; Côrtes, Jussana MilogranaThe impermeabilization of Brazil watersheds have generated socio-economic and environmental impacts innumerable, which has resulton a dare for public administrations. This because most of the towns do not have an efficient drainage system, this causes the water seeps quickly into water streams that are not prepared to support this new level of streamflow, mainly towards the extreme rainfall events. Thus, the hydrological modeling appears like an important support tool for planning and management. However this tool is subject to limitations that must be ascertained through calibration and model validation in real field conditions. This calibration process has been the focus of research and discussion in the last 50 years, and the most currently accepted models are based on uncertainty those analysis to determine the parameters. This study aims at the assessthe development and calibration of the model rainfall-runoff UFGModel1.1 as well as analyze the uncertainty applied to the simulation of streamflow. For this purpose, we used methodologies of uncertainty analysis by means of the Monte Carlo methods (MC) and Markov Chain Monte Carlo (MCMC), which form the basis of the GLUE and DREAM algorithms, respectively, for estimating uncertainties.The results demonstrate that DREAM performs better than the calibrating the GLUE. The various sets of parameters found for both algorithms were considered great for model validation, enabling high efficiency of this precipitation events for medium at very strong with relatively narrow uncertainty limits for DREAM and great for GLUE. The parameter that showed lower sensitivity in the model was the Manning channel.Item Caracterização da influência de cargas poluidoras difusas na qualidade da água no córrego Botafogo, Goiânia, Goiás(Universidade Federal de Goiás, 2013-09-04) Salgado, Aline de Arvelos; Formiga, Klebber Teodomiro Martins; http://lattes.cnpq.br/0787413754235970; Formiga, Klebber Teodomiro Martins; Soares, Alexandre Kepler; Ide, Carlos NobuyoshiAccelerated urbanization and disorganized has caused many impacts on the environment, either by modifying the conditions of living and the quality of water resources. The present work aims to characterize the quality and quantity of water and pollutant loads from Botafogo stream, during the dry and rainy, through analysis of quality and quantity, in order to know the behavior of the water quality of the water body and provide impacts of runoff in the water body. During the dry season, nine monitoring were performed in eight sampling points and during the rainy season, only one point was rated 5 rainfall events. Analyses discriminatory (boxplot), cluster and correlation were essential to understand the variations of water quality in dry periods, demonstrating that monitoring in future there is the possibility of reducing the number of sampling points and parameters. It was observed that the parameters COD, BOD5, color, turbidity, coliforms and E.coli showed clear seasonal variation. In the five rain events was evaluated possible to see large fluctuations in concentration during the monitored parameters, especially coliforms and E.coli, suspended solids and turbidity, clearly demonstrating the impact of stormwater drainage on surface water in urban areas, and it is possible to note that many of the parameters showed much higher concentrations than the limits recommended by CONAMA Resolution 357/05, for rivers Class II. It was also found that the BOD5, the COD, turbidity, and total solids best parameters were the first flush indicators. With the results obtained load was observed that the rainfall events are large contributors to the concentration of pollutants in water bodies, since high loads are transported solids and COD. Thus, the results show that the runoff can carry high concentrations of pollutants into the stream Botafogo and this may suffer siltation and eutrophication. Thus, it is demonstrated the urgent need to study the diffuse loads in water bodies, especially in urban areas and assess the measures that can be undertaken in the basin as a preventive, adoption of alternatives for the control and treatment of pollution and mitigation of impacts caused by human actions.Item Utilização de modelo hidrodinâmico para mapeamento de áreas inundáveis(Universidade Federal de Goiás, 2015-12-10) Santos, Kamila Almeida dos; Formiga, Klebber Teodomiro Martins; http://lattes.cnpq.br/0787413754235970; Formiga, Klebber Teodomiro Martins; Soares, Alexandre Kepler; Rios, Fernanda PoschThe urbanization issues is taking place in Brazilian cities has proved disorganized and thus the floods are becoming a recurring phenomenon. The growth of waterproofing in urban land decreases the amount of infiltrated water in the soil during the rainy season, the rivers might otherwise not conform the water demand in the channels in addition to receive a lot of water runoff In this context the hydrodynamic modeling is an important tool to assess the drainage systems and predict the effects of flooding. This study was applied to the watershed of Ribeirão Anicuns in Goiania, where a considerable part of the basin is in an urban area. Using the hydrodynamic model HECRAS were created various flood scenarios with return periods of 15, 25, 50 and 100 years for the project rainfall; there was aid of a geographic information system, using ArcMap 10.0 to the high-resolution orthophoto city and DEM made from airborne laser scanner, with this material extracted the geometry of the basin. In hydrodynamic modeling crafted the model was run in unsteady flow considering the full Saint Venant equation. In addition to the hydrodynamic modeling was carried out a simulation on the INPE simplified model called HAND, which turned out to be an inexpensive tool, easily accessible and with quality results. With the results obtained (flood hydrograph and flood patches concerning the different return times) flood areas were shown in different scenarios created, and you can compare them. The results showed that the flood spot along the basin have become significantly larger as the return periods grow. In urbanized streams were no major changes than the changes that occurred in streams away from the urban area. Streams that are outside the urbanized area focuses on the alert, they are natural streams and showed that will not support the volume of water resulting from this work.Item Modelagem hidrológica da bacia hidrográfica do Córrego Botafogo – Goiânia – Go(Universidade Federal de Goiás, 2013-07-29) Seibt, Ana Carolina; Formiga, Klebber Teodomiro Martins; http://lattes.cnpq.br/0787413754235970; Formiga, Klebber Teodomiro Martins; Siqueira, Eduardo Queija de; Aragão, Ricardo deThe numerous problems arising from the increased amount of impermeable areas and drainage system of rainwater lagged consist of a hard challenge for public administrations. The hydrological modeling appears as a strong support engineering, however, is subject to a distinct set of constraints rarely explicitly considered by analysis of uncertainty to the results. The present study aims to highlight the role of hydrological modeling through a model transformation process for rainfall-runoff watershed stream Botafogo (Goiania - GO), called UFGModel1.0 and ascertain the uncertainty analysis applied in simulation flows. To achieve the goal, after exposure of the problem, we propose a methodology for uncertainty analysis using the Monte Carlo method, based on the method of estimation uncertainty GLUE. We stress the importance given in consideration of the precipitation fields, and the effect of simplifying the response of a model of a precipitation-runoff. The results demonstrate that multiple sets of parameters were considered excellent high efficiency enabling a model for events intense precipitation. Parameters studied concluded that the sealed area holds great sensitivity, significantly altering the design flow.Item Modelo hidrológico distribuído unidimensional para bacias hidrográficas peri-urbanas(Universidade Federal de Goiás, 2014-04-30) Souza, Rávila Marques de; Formiga, Klebber Teodomiro Martins; http://lattes.cnpq.br/0787413754235970; Soares, Alexandre Kepler; Vasco, Joel; Milograna, JussanãThis study aimed to develop and calibrate a distributed hydrological model used for a one-dimensional drainage of a peri-urban catchment using the optimization multi-objective method Non -dominated Sorting Genetic Algorithm (NSGA - II) for model calibration. Computational algorithms developed in MATLAB environment were adopted to make this study possible. This model allows a precipitation event to set the surface runoff hydrograph at any position of the watershed (planes or channels) regarding infiltration effect and soil physical characteristics. Objective functions were defined and used simultaneously to calibrate the model. From sensitivity analysis performed, it was found that the model is more affected by the parameters related to permeable areas. The model fit was very good, illustrating the applicability of multi-objective calibration in exploring ideal area and to obtain ideal solutions. Validation proved the efficiency of the model used for other different rainfall events in Samambaia stream basin, generating outputs with good accuracy and optimal theoretical value results for Nash & Sutcliffe coefficients of efficiency near the area region.