Thesis advisor: Rudolph Hon / This study characterizes the current state of water quality of surface streams and rivers in the eastern New England region. A set of water quality data for nine rivers, part of the USGS National Water-Quality Assessment (NAWQA) Program was statistically evaluated to identify natural and anthropogenic persistent influential factors on water quality in surface waters. Binary analysis and multivariate analysis, mainly Principal Component Analysis (PCA) and Factor Analysis (FA) were applied to determine the least number of independent relationships among multiple chemical components in the data set. Statistical results show that in eight of the nine rivers included in this study, four principal components can explain about 80% of the total variance of the original data. The most significant contributing factors can be identified with: (1) chemical weathering; (2) road salt applications; (3) nutrient cycling; and (4) agricultural/waste water. / Thesis (MS) — Boston College, 2009. / Submitted to: Boston College. Graduate School of Arts and Sciences. / Discipline: Geology and Geophysics.

A research report submitted to the Faculty of Engineering an the built environment, University of the Witwatersrand, Johannesburg in partial fulfilment of the requirements for the degree of Master of Science in Engineering. Johannesburg, October 2016. / The study investigates the effectiveness of Rand Water’s Scientific Services’ skills development strategy for the assurance of quality drinking water as prescribed by the SANS 0241 National Drinking Water Quality Standard. The aim is to establish whether: 1) the present skills are adequate to provide the scientific data required for affirming drinking water quality and 2) the skills development taking place in the Scientific Services division is adequate for the level and quantity of scientific skills required for the future. There is also some discussion to understand the motivation for maintaining and increasing skills within the Scientific Services division for Rand Water. Assuring drinking water quality within Rand Water is the sole responsibility of the Scientific Services division. The division provides regular routine and non-routine drinking water quality monitoring, testing, data collection, analyses and reporting on the organisation’s performance against the SANS 0241 Drinking Water Quality Standards (SANS, 2006).The focus of the analysis is Scientific Services Division in Rand Water, although the discussion in view of the topic is not limited to the division. Production of drinking water encompasses two key aspects that must be investigated they are quality and quantity, however the close up analyses could only be successful completed for quality in the context of the quantity produced. Skills development planning within Scientific Services has always been based on the division’s feeder pipelines to be able to recruit from and retain scientific skills within the organisation. The division concentrates on Graduate, Bursar and Experiential Learner development ensuring a sustainable, trained and readily available pipeline of skills from which to recruit. Employees currently within the division both permanent and temporary form the type of scientific skills required for water quality monitoring and drinking water standard production and assurance. Employees have been placed within the functional scientific streams of the division and further by their levels of appointment and qualifications. The data analysis has also been done for the increasing of skills using the same framework. Age and gender was also included to show performance of the division in respect to transformation and equity. Equity in relation to growth is currently a global matter that is under scrutiny. The World Economic Forum has put equity in the spotlight to ensure countries look at their performance. The significance is that it has an impact on how the water resources in a country are distributed and managed. The Water Reforms in most developing countries have sparked large scale discussions around provisioning of water for all. Human Development and Water Resource Management are agendas that countries need to handle collectively with the ultimate outcome being achieving equity for all (UNDP, 2013). Rand Water’s Scientific Service skills data indicates that it has adequate scientific capacity to meet its present mandate of providing drinking water quality assurance for the organisation. There is some concern that the aging workforce is concentrated at management and specialists levels, therefore developing these skills for the next 5 to 10 years requires immediate attention. Transfer of skills and retention of skills requires careful strategic planning in order to attract a younger transformed workforce. The study shows that in as much as routine quality assurance is core, it is also equally critical to have employees who can troubleshoot within the context of the new environmental pressures and diverse operational conditions. The demand for quality drinking water over the last 110 years has increased throughout the country. The mandatory expansion of the organisation translates into sharing of human resources with other parts of the country to produce quality drinking water. Rand Water has been entrusted to take on the responsibility of other water utilities in the country and ensure that they reach the required standard for the production of quality drinking water. The full scope of the organisation’s mandate requires that it provide skills to handle the treatment of drinking water and wastewater in the near future. Although wastewater treatment is currently managed by the local municipalities, Rand Water will be having an active role to improve services. This would mean distributing the existing capacity within the organisation over a greater area of work along with a significant increase in the demand for scientific analyses of drinking water quality. The pace at which skills development takes place in Rand Water Scientific Services division shows that it will be able to meet the present needs. There are questions raised on the sustainability of the skills for the future. Maintaining and developing skills within the division is critical to be able to sustain the nature, structure and functioning of the division in its current form. The other factor that must also be maintained is the transformational equity demands of the country. The notion that there is a lack of experienced previously disadvantages scientists must be addressed directly to meet all the future demands of the sector, region and continent in a short space of time. / MT2017

A research report submitted to the Faculty of Engineering and the Built Environment, University of the Witwatersrand, Johannesburg, in partial fulfilment of the requirements for the degree of Master of Science in Engineering. August, 2017 / The foremost aim of potable water treatment is to produce water that does not pose a health risk when consumed and/or otherwise used. Nevertheless, research has established that the quality of treated water deteriorates during distribution. The nature and extent of this deterioration varies from system to system and from time to time. The aim of this research study was to monitor the parameters that are known to significantly affect biostability and biofilm formation potential in drinking water distribution systems. Biweekly water samples were collected from thirteen sites, across a section of Johannesburg Water’s network, between September 2015 and August 2016. All samples were assayed for a suite of fifteen water quality parameters using standard methods. Heightened temperature, dearth of chlorine residuals, availability of biodegradable dissolved organic carbon (BDOC), and advanced water age all engendered the loss of biostability (instability). Biostability controlling parameters varied seasonally and spatially. Samples collected during spring and summer, in general, were most likely to be characterized by instability than samples collected during winter and autumn. Samples collected from sites RW80, RW81, RW82, RW83, RW104 and RW253 were more prone to instability compared to samples from other sites. From the results, it is clear that chlorine residuals ought to be kept above 0.2 mg/l, and, BDOC below 0.3mg/l to prevent the loss of heterotrophic stability in distributed water. BDOC concentrations can be decreased by, flushing the pipes, cleaning reservoirs regularly and by further treating feed water before distributing. Booster disinfection can be relied upon to ensure that chlorine residuals are maintained throughout the network. Apart from potential health risks, biological instability and biofilm growth can result in non-compliance with regulations. / MT2018

Student Number : 0107471X - MSc research report - School of Civil and Environmental Engineering - Faculty of Engineering and the Built Environment / Water plays a global role in an enormous variety of ways. More importantely it also plays a fundamental role on a regional and local scales where it has a profound effect on the environment and socio economic development. It is a prerequisite for many of the mans activities and as such it must be managed and protected accordingly. In this water quality plays a fundamental role and water quality monitoring is a foundation stone of any serious efforts to manage water resources on any scale. The research conducted focused on water quality monitoring in the SADC region. It looked at the current practice and the gaps present with respect to the real needs and international best practice. SADC region is characterized by trans-boundary water systems where pollution of water resources is often not understood properly nor has been seriously studied. A regional Water Quality Monitoring Program is advocated to address these issues and is seen as one of the prerequisites for effective water resources management in the SADC region. Existing Water Quality Monitoring in individual countries of the SADC region has been studied on the basis of existing (limited) information and gaps with respect to international best practice have been identified. Recommendations have been made regarding the establishment of the SADC Water Quality Monitoring program. A set of principles on which this should be based have been formulated. It has been concluded that SADC countries do not have an appropriate water quality monitoring in place and that what does exist is not in line with the best practice recommendations. It is suggested that without an appropriate regional water quality monitoring program water quality could become one of the limiting factors of the future economic development in the region.

Orientador: Teresa Cristina Tarlé Pissarra / Banca: Renato Farias do Valle Junior / Banca: José Eduardo Pitelli Turco / Banca: Maria Teresa Vilela Nogueira Abdo / Banca: João Antônio Galbiatti / Resumo: Este trabalho teve como objetivos analisar morfometricamente a bacia hidrográfica, avaliar as dinâmicas espacial e temporal de variáveis físico-químicas da água da rede de drenagem e suas influências aos sistemas produtivos localizados nas vertentes da microbacia do Córrego da Fazenda Glória, município de Taquaritinga, SP, no intuito de verificar a alteração ambiental em relação ao uso/ocupação do solo e o estado trófico das águas. Foram selecionados sete microbacias (M1 a M7) e quatro pontos na foz (F1 a F4), para a coleta de água e análise do uso do solo, no período de dois anos (Agosto de 2010 a Julho de 2012). As variáveis analisadas foram: temperatura (TºC), pH, condutividade elétrica (CE), sólidos totais dissolvidos (STD), turbidez (T), oxigênio dissolvido (OD), a concentração do Fósforo (P) Total e o estado trófico do recurso hídrico. Os dados foram submetidos à análise estatística multivariada, exceto o fósforo, que foi analisado mediante análise descritiva. O monitoramento do recurso hídrico apresentou estreita relação entre as variáveis SDT e CE, com maior evidencia em relação ao ambiente da microbacia M2. O cultivo de cana-de-açúcar na maioria dos pontos amostrados foi predominante, seguido de áreas alagadas ou de várzea. O grau de eutrofização foi de eutrófico à hipereutrófico. A análise multivariada mostrou que a proporção da variância total retida nos dois primeiros fatores foi de 70,79% (CP1=39,08%; CP2=31,71%). O fator CP1 mostrou correlação positiva entre as variáveis SDT e CE, evidenciando processo de escoamento superficial. O fator CP2 mostrou correlação negativa para a variável T em relação ao OD, mostrando... / Abstract: This study aimed to analyze morphometric the basin, evaluate the spatial and temporal dynamics of physical-chemical parameters of water drainage network and its influences to production systems located on the slopes of the watershed of Córrego da Fazenda Glória, Taquaritinga, SP, in order to verify the environmental change from the use / land cover and the trophic status of waters. Seven watersheds were selected (M1 to M7) and four points at the mouth (F1 to F4), to collect water and land use analysis, the two-year period (August 2010 to July 2012). The variables analyzed were: temperature (TºC), pH, electrical conductivity (EC), total dissolved solids (TDS), turbidity (T), dissolved oxygen (DO), the concentration of phosphorus (P) Total and the trophic state of the resource water. The data were subjected to multivariate statistical analysis, except the match, which was analyzed by descriptive analysis. The monitoring of water resources showed a close relationship between the SDT and EC variables, more evident in relation to M2 watershed environment. The cane sugar cultivation in most of the points was predominant, followed by wetlands or floodplains. The degree of eutrophication was eutrophic to hypereutrophic. Multivariate analysis showed that the proportion of the total variance retained in the first two factors was 70.79% (CP1 = 39.08%; CP2 = 31.71%). The CP1 factor showed a positive correlation between SDT and EC variables, showing runoff process. The CP2 factor negatively correlated to the T ... / Doutor

Resumo: Considerando a grande importância da bacia do Alto do Rio Sorocaba para a região de Sorocaba, seja para o abastecimento da população, geração de energia elétrica, irrigação e usos industriais, este trabalho teve como objetivo principal avaliar a qualidade da água do reservatório de Itupararanga. O estudo foi desenvolvido pela da geração de um banco de dados georreferenciado, avaliação da qualidade de água no seu gradiente espacial (horizontal e vertical) e temporal (épocas de seca e chuvosa), visando conhecer o comportamento de alguns elementos e compostos na coluna d'água e sua distribuição neste reservatório, correlacionando-os ao uso e ocupação do solo adjacente. Assim, de acordo com os resultados obtidos no gradiente horizontal (montante-jusante) na época de seca 90% dos pontos estavam eutrofizados (IET > 54) e na época de chuva 60%. No gradiente vertical (lâmina d'águafundo) observou-se que a distribuição de elementos metálicos e nutrientes variaram de acordo com o pH e presença de clorofila-a, indicando que a eutrofização do reservatório altera as condições de crescimento de algas que por sua vez afeta a estratificação de elementos na coluna d'agua. Portanto, entende-se que são necessárias ações voltadas ao planejamento do uso e ocupação do solo e gerenciamento integrado desta importante bacia hidrográfica localizada no interior paulista. / Abstract: Considering the great importance of upper Sorocaba basin to the Sorocaba region to water supply, electric generation, irrigation and industrial uses, this work has the main objective to evaluate the water quality of Itupararanga reservoir. The study was conducted with the generation of a georreferenced data base, the water quality evaluation in the spacial gradient (horizontal and vertical distribuition) and temporal (dry and wet climate), trying to know the comportament of some elements and solutions in water column in the reservoir, trying to make the correlation between the data and land use. The results show that in horizontal gradient (upstream - downstream) in the dry period, 90% of collecting points are eutrophic (IET > 54), in the wet period, 60%. In vertical gradient (up - bottom) was observed that the distribuition of some metallic elements and some compounds varied in accordance with pH and chlorophyll-a, indicating that the reservoir eutrophization shifts the algal growing, that causes, with the temperature, stratifies elements in water column. Actions to plan the land use in this watershed are needed to reduce the environment and water quality degradation, making a integrated managing of this important watershed in countryside of São Paulo State. / Orientador: Fabiano Tomazini da Conceição / Coorientador: Washington Barbosa Leite Júnior / Banca: Rodrigo Braga Moruzzi / Banca: Alexandre Marco da Silva / Mestre

Orientador: Fernando Braz Tangerino Hernandez / Banca: Sérgio Luís de Carvalho / Banca: Marília Cândida de Oliveira / Resumo: As condições insuficientes de disponibilidade e qualidade de água para os usos múltiplos afetam diretamente a economia de cidades cuja principal atividade é a agricultura irrigada. O objetivo do trabalho foi avaliar a qualidade de água para a irrigação do Córrego do Coqueiro, afluente do Rio São José dos Dourados. Foram georreferenciados cinco pontos ao longo do córrego para coleta de água e medição de vazão durante o período de 2007 a 2009. Os parâmetros avaliados foram: sólidos dissolvidos e suspensos, turbidez, temperatura, pH, condutividade elétrica, ferro total, oxigênio dissolvido, dureza, cálcio, magnésio, coliformes fecais e totais, vazão e descarga sólida total. De acordo com os resultados verificou-se que no ano de 2007 os valores médios de sólidos suspensos e totais, turbidez, ferro total e coliformes foram superiores aos demais períodos. Em sua maioria, as amostras apresentaram classificação de médio a alto risco ao sistema de irrigação localizada para as variáveis sólidos suspensos, ferro total e pH e apresentaram uma tendência de aumento no ponto final do córrego. A condutividade e cálcio apresentaram baixo potencial de danos. Para coliformes fecais e totais os pontos 2 e 3 apresentaram 3% das amostras com alto risco de contaminação, respectivamente. Não houve diferença estatística entre os períodos para os valores médios de vazão. O uso da água do Córrego do Coqueiro pode causar a obstrução dos encanamentos e emissores de sistemas de irrigação localizadas, sendo imprescindível a utilização de sistemas de filtragem, principalmente, se a fonte de captação de água for próxima aos pontos finais do manancial / Abstract: Conditions of insufficient quality and availability of water for multiple uses, directly affecting the economy of cities in which the main activity is agriculture. The objective was to evaluate the quality of water for irrigation of Coqueiro stream, a tributary of the São José dos Dourados. Five points along the stream were georeferenced for water collection and flow measurement for the period of 2007 to 2009. The parameters were: dissolved and suspended solids, turbidity, temperature, pH, conductivity, total iron, dissolved oxygen, hardness, calcium, magnesium, coliforms total and fecal, flowing and total solid discharge. According to the results observed in 2007 the average and total suspended solids, turbidity, iron and total coliforms were higher than in other periods. Most of the samples showed a rating of medium to high risk to the irrigation system for the variable suspended solids, total iron and pH and showed an increasing trend at the end point of the stream. The conductivity and calcium showed a low potential for damage. For fecal and total coliforms points 2 and 3 showed 3% of samples with high risk of contamination, respectively. There was no statistical difference between the periods for the mean flowing. The use of water from the stream Coqueiro can cause clogging of pipes and emitters of located irrigation systems and is essential to use filtering systems, especially if the source water intake is near the end points of the watershed / Mestre

Orientador: Sérgio Campos / Coorientador: Assunta Maria Marques da Silva / Coorientador: Vera Lex Angel / Banca: Luciano Nardini Gomes / Banca: Osmar Delmanto Junior / Banca: Jandira Liria B. Talamoni / Banca: Raimundo Leite Cruz / Resumo: Bacia hidrográfica é a unidade geográfica que se ajusta aos objetivos de planejamento agrícola e ambiental, cuja área é sensível e imprescindível para sua integridade física e qualidade da água, devendo ser protegida pela vegetação. A sub-bacia do Córrego do Cintra (1.136,8ha) está localizada à noroeste de Botucatu SP, tem suas nascentes no Campus da UNESP de Rubião Junior e segue fluxo ao norte até o Rio Tietê. Este trabalho teve como objetivo geral caracterizar a estrutura e o estádio sucessional da mata ripária, avaliar a qualidade da água e detectar fontes de poluição pontual e difusa naquela sub-bacia. O método fitossociológico utilizado foi o de ponto-quadrante, aplicado em três áreas de mata ripária; os índices Dr, Dor, IVC, Diversidade e Similaridade foram obtidos através de cálculo em planilha eletrônica e do programa Past; o estádio sucessional foi determinado pela proporção de espécies de cada grupo ecológico. Os parâmetros físico-químicos e espécies químicas da água foram amostrados em oito pontos no período de 2007 a 2009 e para avaliar o comportamento de cada variável nos locais de amostragem, foram realizadas análises de variâncias seguidas do teste de Tukey e também a análise de componentes principais. Estes parâmetros, as análises microbiológicas e as dos metais mais tóxicos foram determinados pelo Standard Methods for the Examination of Water and Wastewater e comparados aos valores máximos permitidos (VMP) do Conama, Classe II, e quanto para os defensivos agrícolas utilizou-se o método cromatográfico. Nas três áreas de amostragem foram encontradas 2.241 indivíduos arbóreos de 145 espécies... (Resumo completo, clicar acesso eletrônico abaixo) / Abstract: Watershed is the geographic unit that meets the goals of agricultural and environmental planning, the area of which is sensitive and essential for its physical integrity and water quality and thus must be protected by the vegetation. The subwatershed of Cintra Stream (1,136.8ha) is located northwest to Botucatu, São Paulo State, and has its springs in the Campus of UNESP at Rubião Junior, flowing towards north until Tietê River. The general aims of this study were to characterize the structure and the successional stage of the riparian forest, to assess the water quality and to detect punctual and diffuse pollution sources in that subwatershed. The adopted phytosociological method was the point-quadrant, applied to three areas of riparian forest; the indexes RD, RDo, CVI, Diversity and Similarity were obtained by calculation in spreadsheet and the software Past; the successional stage was determined based on the proportion of species of each ecological group. The physico-chemical parameters and the chemical species of water were sampled at eight sites from 2007 to 2009, and to assess the behavior of each variable at the sampling sites, analyses of variance were done followed by Tukey's test and analysis of the main components. These parameters, microbiological analyses and analyses of the most toxic metals were determined according to the Standard Methods for the Examination of Water and Wastewater and compared to Conama's maximal allowed value (MAV), Class II; for pesticides, the chromatographic method was used. In three sampling areas, 2,241 arboreal individuals and 145 species were found; they belonged to 55 botanical families, and the most representative family was Fabaceae with... (Complete abstract click electronic access below) / Doutor

Orientador: Sérgio Luís de Carvalho / Banca: Liliane Lazzari Albertin / Banca: Maria José Alencar Vilela / Resumo: A água potável é um recurso que vem se tornando cada vez mais escasso no planeta, enquanto isso a população mundial está aumentando, o que futuramente poderá causar um grande problema de ordem mundial. Além disso, o homem vem ocupando de forma cada vez mais desordenada as bacias hidrográficas através de atividades de desmatamentos, queimadas, práticas agrícolas perniciosas, atividades extrativistas agressivas, ocupações urbanas generalizadas gerando a impermeabilização dos solos, lançamento de esgotos industriais e domésticos nos rios e lagos. Enfim, todas essas atuações impactantes ao meio ambiente têm gerado uma deterioração da qualidade das águas naturais, com riscos de propagação de doenças de veiculação hídrica ao próprio ser humano. A avaliação da qualidade da água pode subsidiar a formulação de planos de manejo e gestão de sistemas aquáticos. Neste trabalho, foi avaliada a qualidade da água do Córrego da Aldeia, no município de Fernandópolis-SP, utilizando-se o Índice de Qualidade da Água (IQA) e o seu estado de degradação associado à utilização da área de entorno. As amostragens de água e a aplicação do questionário socioeconômico e ambiental foram realizadas entre setembro/2013 e agosto/2014, em cinco pontos de amostragem e na área de entorno dos córregos. As amostras foram analisadas quanto aos parâmetros físicos, químicos e microbiológicos. Constatou-se que na época das chuvas ocorreu uma queda no valor do IQA, devido ao grande aumento da turbidez e de sólidos totais na água, provenientes do carreamento de partículas sólidas pelo escoamento superficial, indicando falta de práticas de conservação de solo e de mata ciliar. A qualidade das águas variou de regular a boa no período em estudo, onde alguns parâmetros excederam ou ficaram abaixo dos limites estabelecidos pela Resolução CONAMA n° 357/05 para corpos d'agua de classe II. Em alguns pontos, devido à forma... / Abstract: Drinking water is a resource that is becoming increasingly scarce on the planet, meanwhile the world population is increasing, which ultimately could cause a big problem of world order. In addition, the man has occupied so increasingly disorderly watersheds through deforestation activities, fires, harmful agricultural practices, aggressive extractive activities, widespread urban occupations generating soil sealing, release of industrial and domestic sewage into rivers and lakes. Anyway, all these actions impacting the environment have generated a deterioration of quality of natural waters, with risk of spread of waterborne diseases to human being. The assessment of water quality can support the formulation of management plans and management of aquatic systems. In this work, the quality of the water stream village, in the municipality of Fernandópolis-SP, was assessed using the Water Quality Index (WQI) and its state of degradation associated with the use of the surrounding area. Water sampling and the implementation of socio-economic and environmental questionnaire were conducted between September/2013 and August/2014 in five sampling sites and in the surrounding area streams. The samples were analyzed for physical, chemical and microbiological parameters. It was found that during the rainy season there was a fall in the value of the IQA, because of the increased turbidity and total solids in the water, from the carrying of solid particles by runoff, indicating lack of soil conservation practices and forest riparian. Water quality ranged from fair to good in the period under study, where some parameters exceeded or fallen below the limits established by CONAMA Resolution n o 357/05 to water bodies class II. In some places, due to the form of land use, watershed presented the environmental fragility with potential risk of contamination of their water resources, and the lack of information and awareness of residents about the environmental... / Mestre

A modelagem matemática da qualidade da água de rios constitui-se em uma ferramenta indispensável ao planejamento e à gestão dos recursos hídricos. No entanto, os modelos atuais disponíveis para a simulação da qualidade da água, como o QUAL2K, apresentam limitações estruturais e funcionais. Com o intuito de oferecer uma ferramenta que elimine essas deficiências, foi desenvolvido um modelo para a simulação da qualidade da água em rios em regime não-permanente, utilizando o software Vensim PLE, que também opera em regime permanente. O modelo desenvolvido simula dezoito variáveis da qualidade da água (oxigênio dissolvido, demanda bioquímica de oxigênio carbonácea, nitrogênio orgânico, nitrogênio amoniacal, nitrito, nitrato, fósforo orgânico e inorgânico, sólidos inorgânicos, fitoplâncton, zooplâncton, algas de fundo, detritos, coliformes totais, alcalinidade, carbono inorgânico total, pH e temperatura), bem como o metano e as formas de nitrogênio e fósforo presentes na camada aeróbia e anaeróbia do sedimento. Diversos cenários foram gerados para a realização de simulações computacionais utilizando o modelo desenvolvido neste estudo, o programa QUAL2E, o QUAL2K e quando possível, soluções analíticas. Os resultados das simulações obtidos com este modelo, em regime permanente, ajustaram-se bem aos modelos da família QUAL. As simulações em regime não-permanente também apresentaram bons resultados, visto que a solução numérica produzida pelo modelo seguiu a tendência geral da solução analítica. / The water-quality modeling is an indispensable tool for the water resource planning and management. However, the current available models for the simulation of water-quality, as the QUAL2K, present structural and functional limitations. With the purpose of offering a tool that facing those deficiencies, a model for time-variable simulation of the rivers water quality, using the software Vensim PLE® was developed. The model developed simulates eighteen water-quality variables (oxygen dissolved, carbonaceous BOD, organic nitrogen, ammonia, nitrite, nitrate, organic and inorganic phosphorus, inorganic solids, phytoplankton, zooplankton, bottom algae, coliforms, alkalinity, total inorganic carbon, pH and temperature),in addition to methane and the nitrogen and phosphorus forms existing in the aerobic and anaerobic layer of the sediment. Several scenarios were built to accomplish computational simulation using the model developed in this work, the program QUAL2E, the QUA2K, and when possible, analytical solutions. The results obtained, with this model, adjusted well to the results generated by the QUAL family models, at steady-state. The simulations at unsteady state presented good results since the numerical solutions followed the general tendency of the analytic solution.