Estudo da variabilidade da deriva vertical do plasma ionosférico sobre a região de Natal/RN, Fortaleza/CE e Cachoeira Paulista/SP para alguns casos de tempestades magnéticas de abril a setembro de 2000

In this work are presented the results of research on the variation of vertical plasma drift from the F layer that commonly occurs during the period close to the going down of the sun (between 21UT - 22UT), and consisting of an increase in the F layer in time of day and a drop at night on the cities of Natal / RN (The 33.7º, 5.6º S), Fortaleza / CE (38.45º O, 3.9º S) and Cachoeira Paulista / SP (45.0ºO, 22.7º S ). Thus, data was used (ionograms) virtual height t ( h' ) as a function of the frequency F for the layer of the ionosphere. These data were collected through ionossonda type CADI (Canadian Advanced Digital Ionosonde) to the cities of Natal and Fortaleza, and the Digisonde DPS to the town of Cachoeira Paulista. They considered only the data available 2000 maximum solar year. With the virtual height ( h' ) data reduced in the frequencies of 6MHz and 5MHz, the next step was to calculate. The results showed that the variability of the vertical drift rate F ionospheric layer periods of magnetic storms is related both to the penetration of the electric fields as the disturbance dynamo electric fields.

Narrativas poéticas e trajetórias dos poetas em Mossoró/RN

The city of Mossoro/RN has showed up as a “cultural capital” in the state of Rio Grande do Norte due to a politic of events that enhance historical facts occurred in that region. These actions evoke researches about a construction of a self-identity of the city and attract many tourists that provides a boost to local economy. Considering this, this paper aims to understand the insertion of poets in this cultural context, analyzing the cultural performances that they participate and their personal narratives. Semi-structured interviews and participant observation in cultural events were employed to get this aim, privileging the observation of popular poets, whose presentations are more frequent. This overview took to the approximation with two artists associations, of which the interviewed poets were selected: “POEMA – Associação de Poetas e Prosadores de Mossoró” and “Casa do Cantador”. The relationship observed among the artists of these institutions – writers, improvisers, cordel makers, musicians and “emboladores de coco” – raised questions about the complexity of popular culture and the social connections among the artists of the city, discussed in this study.

O Programa Nacional Biblioteca da Escola - PNBE: da gestão ao leitor na educação infantil de Natal-RN

This study aims to investigate the process of implementation of Programa Nacional Biblioteca da Escola, PNBE, and the reader's training on Childhood Education level in Natal. The promotion of literary reading is the opportunity of inclusion in a world that is connected to citizenship, to human rights and social justice, because the reading is the way which gives meaning to the life and, therefore, it is a right for everybody. The study is characterized as a qualitative research with evaluative approach. The methodological procedure that constitutes this corpus took place in three stages: the first one was about the analysis of laws and documents of national public policies for the reading promotion; questionnaires were applied by Managing Committee - Natal/RN to CMEIs and the available websites from MEC that provide distribution of the acquis; in the second stage, we adopted the semi-structured interview as a methodological procedure elaborated with open questions that focus on the program management and to the acquis of PNBE; and in the third step we visited the 21 centers of childhood education in Natal for interviewing and to do the exploratory observation in places of reading. The Informant actors in this research are: the advisors of SME - Natal and FNDE, managers and teachers in Municipal Childhood Education Centers who totalize 30 informants. This theoretical and methodological framework follows the studies of Amarilha (1993; 1994; 2002; 2006; 2010; 2012), Bardin (2001), Bogdan; Biklen (1994), Castro (2007; 2008; 2012), Demo (2000; 2006; 2008), Fischer (2006), Moreira; Caleffe (2008), Paiva (2008; 2012), Secchi (2010; 2012), Soares (2003; 2008) and Zilberman (2001; 2003; 2008). The analysis indicates that decentralization strategy which is adopted in public management model will transfer responsibilities and assumption of the PNBE, exempting the actors to planning actions ensuring the efficiency and efficacy implementation on reading policy to national and municipal levels. The qualified acquis that is distributed by MEC reaches every Childhood Education center and does not depend on teacher's desire or it action, only a few of them know about it and they do not have information about the PNBE, neither receive specific training in order to articulate it to the practice of reading with children from Childhood Education. The reading project implemented by private education system in Natal overlaps the PNBE, making it invisible. The reading places that are available for that schooling stage are summarized to the reading corners. In some CMEI, books remain stored in boxes or they are locked in the closet, out of use to the teachers and students. Thus, care for the acquisition, selecting acquis, and a preoccupation to the supply of the reading and books for this education level are lost into volumes of closed boxes, teachers are jettisoned to this process and children do not have any enchantment to the reading or books. In this context, this paper draws attention to how much we should still investigate in order to understanding the perspectives, stresses and challenges from public policies for the reading promotion in our country. We hope that the research will help to improve the management model of the PNBE, ensuring the reading democratization and therefore the reader's training in early Childhood Education.

O Programa Nacional Biblioteca da Escola - PNBE: da gestão ao leitor na educação infantil de Natal-RN

This study aims to investigate the process of implementation of Programa Nacional Biblioteca da Escola, PNBE, and the reader's training on Childhood Education level in Natal. The promotion of literary reading is the opportunity of inclusion in a world that is connected to citizenship, to human rights and social justice, because the reading is the way which gives meaning to the life and, therefore, it is a right for everybody. The study is characterized as a qualitative research with evaluative approach. The methodological procedure that constitutes this corpus took place in three stages: the first one was about the analysis of laws and documents of national public policies for the reading promotion; questionnaires were applied by Managing Committee - Natal/RN to CMEIs and the available websites from MEC that provide distribution of the acquis; in the second stage, we adopted the semi-structured interview as a methodological procedure elaborated with open questions that focus on the program management and to the acquis of PNBE; and in the third step we visited the 21 centers of childhood education in Natal for interviewing and to do the exploratory observation in places of reading. The Informant actors in this research are: the advisors of SME - Natal and FNDE, managers and teachers in Municipal Childhood Education Centers who totalize 30 informants. This theoretical and methodological framework follows the studies of Amarilha (1993; 1994; 2002; 2006; 2010; 2012), Bardin (2001), Bogdan; Biklen (1994), Castro (2007; 2008; 2012), Demo (2000; 2006; 2008), Fischer (2006), Moreira; Caleffe (2008), Paiva (2008; 2012), Secchi (2010; 2012), Soares (2003; 2008) and Zilberman (2001; 2003; 2008). The analysis indicates that decentralization strategy which is adopted in public management model will transfer responsibilities and assumption of the PNBE, exempting the actors to planning actions ensuring the efficiency and efficacy implementation on reading policy to national and municipal levels. The qualified acquis that is distributed by MEC reaches every Childhood Education center and does not depend on teacher's desire or it action, only a few of them know about it and they do not have information about the PNBE, neither receive specific training in order to articulate it to the practice of reading with children from Childhood Education. The reading project implemented by private education system in Natal overlaps the PNBE, making it invisible. The reading places that are available for that schooling stage are summarized to the reading corners. In some CMEI, books remain stored in boxes or they are locked in the closet, out of use to the teachers and students. Thus, care for the acquisition, selecting acquis, and a preoccupation to the supply of the reading and books for this education level are lost into volumes of closed boxes, teachers are jettisoned to this process and children do not have any enchantment to the reading or books. In this context, this paper draws attention to how much we should still investigate in order to understanding the perspectives, stresses and challenges from public policies for the reading promotion in our country. We hope that the research will help to improve the management model of the PNBE, ensuring the reading democratization and therefore the reader's training in early Childhood Education.

As múltiplas dimensões da garantia dos direitos do paciente idoso internado: o caso de uma instituição hospitalar pública no município de Natal/RN

In the context of current capitalist society, marked by the logic that restricts the human person their status as workforce, in order to generate profits, old age is often treated as an underprivileged life stage. This reality becomes more intense considering the sharp aging process that affects brazilian society is accompanied by the country's entry into a globalized world and tensioned by the dictates of capital. Thus, despite the increasing development of policies to strengthen the guarantee of elderly rights, it is necessary to establish effective strategies of these measures to ensure a higher quality of life to these subjects. Therefore, it is necessary to develop studies that problematize the issue of the elderly, which represent a growing portion of the population, and hence have more visible demands, including in health. With the increase in the elderly population in Brazil it is possible to realize the country is going through a demographic transition and epidemiological changes that contribute to change the landscape of health care of the elderly, especially the hospitalization. Thus, this study aimed to analyze the multiple aspects of ensuring the rights of elderly patients admitted to the State Hospital Dr. Ruy Pereira dos Santos (HRPS), located in Natal / RN, whose most patients are elderly. Specifically sought to understand the aging process, its social consequences and the vulnerability to which it is exposed, especially during the disease situation; understand the process of construction of the Brazilian public health and their actions for older people; learn the expressions of citizenship formation in Brazil with regard to policies for older people; and investigate the design of health professionals about the guarantee of the right of hospitalized elderly. Starting from an integrated coordinated theoretical and practical possibilities, a qualitative research and literature character, documentary and field was held. For this, there were four semi-structured interviews with health research locus Hospital professionals - namely, two social workers, a doctor and a nurse - as well as life stories with the hospitalized elderly patients, one in each deck the said Hospital, totaling three. The results pointed to the difficulty of health policy become effective as law and stressed one historical scenario violation of the rights of elderly hospitalized patients, which persists due to the precarious situation and the difficulty of effective implementation of the Unified Health System (SUS ) and other public policies to that end.

“Acham que brotamos das fontes dessa cidade?”: uma etnografia sobre o cotidiano de sobrevivência de pessoas em situação de rua em Nata/RN

Through participant observation, held in the administrative region east of Natal / RN, this research aimed to understand about the daily life of men and women living on the streets in the city. How they relate to the space where they live? In this relationship, which uses and survival strategies triggered by this social segment? These were some of the questions that guided this research, in order to highlight the specificities of this way of life and the possible consequences that such a situation could reverberate. In this sense, there was an effort to keep up with people on the streets, their itineraries and seize their narratives. Along the search path - which took place intermittently between the years 2011-2015 - attended spaces of occupation and traffic of this population group in the street, as well as insert me and got involved in events, forums, seminars, meetings and subject of joints on the streets as a political movement (MNPR / RN). They are considered in this study as people on the street to those who occupy the street as their main space of survival and ordering of daily life: in the streets sleep, feed themselves, meet the physiological and hygienic needs, and is where draw sustenance. The street is taken in this research in its broadest sense, including all possible places relatively protected from the cold, rain and exposure to violence, thus includes both open and public spaces: as squares and parks; but also closed and private places: hostels, abandoned warehouses, prisons, etc. It was observed that in none of these spaces guys on the street are established in a fixed manner, in contrast, they experience the roaming, which in part is due to urban systems - which tends to stigmatize them and delete them places - and the very need to survive, because while living in the street differentiated practices are triggered, and these differ from the dominant mode of sedentary life.

“Acham que brotamos das fontes dessa cidade?”: uma etnografia sobre o cotidiano de sobrevivência de pessoas em situação de rua em Nata/RN

Through participant observation, held in the administrative region east of Natal / RN, this research aimed to understand about the daily life of men and women living on the streets in the city. How they relate to the space where they live? In this relationship, which uses and survival strategies triggered by this social segment? These were some of the questions that guided this research, in order to highlight the specificities of this way of life and the possible consequences that such a situation could reverberate. In this sense, there was an effort to keep up with people on the streets, their itineraries and seize their narratives. Along the search path - which took place intermittently between the years 2011-2015 - attended spaces of occupation and traffic of this population group in the street, as well as insert me and got involved in events, forums, seminars, meetings and subject of joints on the streets as a political movement (MNPR / RN). They are considered in this study as people on the street to those who occupy the street as their main space of survival and ordering of daily life: in the streets sleep, feed themselves, meet the physiological and hygienic needs, and is where draw sustenance. The street is taken in this research in its broadest sense, including all possible places relatively protected from the cold, rain and exposure to violence, thus includes both open and public spaces: as squares and parks; but also closed and private places: hostels, abandoned warehouses, prisons, etc. It was observed that in none of these spaces guys on the street are established in a fixed manner, in contrast, they experience the roaming, which in part is due to urban systems - which tends to stigmatize them and delete them places - and the very need to survive, because while living in the street differentiated practices are triggered, and these differ from the dominant mode of sedentary life.

Diagnóstico e tratamento do TDA/H: investigação dos critérios utilizados por diferentes categorias profissionais da cidade de Natal-RN

TDA/H is usually considered among the most frequent psychological malfunctions in both childhood and adolescence. It covers a complex combination of neurocognitive deficits leading to developmental troubles linked to attention failure, hyperactivity and impulsivity. On the other hand, diagnosis of TDA/H is frequently a hard task, since sociocultural aspects concerning the evaluation of symptoms lead to some etiologic vagueness. Additionally, the large extent of evaluation tools, together with the diversity of therapeutic approaches referred by specialized literature justify the interest of investigating the diverse ways of diagnosing and treating TDA/H by medical doctors, psychologists and psycho-pedagogues developing professional activities in Natal-RN (Brazil) in the assistance of children and teenagers with TDA/H diagnosis hypothesis. A sample of thirty-four professionals participated in this study in a convenience-basis, and submitted to a semi-directed interview. Information from this procedure was analyzed, categorized and submitted to a multidimensional descriptive analysis (cluster analysis procedure), allowing to verify the partition of the sample in two groups: Group 1, basically composed by medical professionals, and Group 2, composed by psychologists and psycho-pedagogues. The categorized variable “Number of sessions” – average time used for arriving to a diagnosis – was the partition-variable showing the larger amount of statistical contribution for the partition, followed by the variables “Professional formation” and “Use of diagnostic tools”. Variables such “Comorbidity”, “TDA/H Definition” and Modalities of Intervention” also showed contribution to the partition obtained, even though their lesser amount of statistical contribution. Despite some similarity between these two groups, data allowed to demonstrate specific association between academic source-formation of the professional concerned and diagnosis and intervention modalities shown by these professionals when dealing with TDA/H. These data confirm relevant heterogeneity in dealing with TDA/H due to professional formation of professionals involved in diagnosis and treatment tasks.

Diagnóstico e tratamento do TDA/H: investigação dos critérios utilizados por diferentes categorias profissionais da cidade de Natal-RN

TDA/H is usually considered among the most frequent psychological malfunctions in both childhood and adolescence. It covers a complex combination of neurocognitive deficits leading to developmental troubles linked to attention failure, hyperactivity and impulsivity. On the other hand, diagnosis of TDA/H is frequently a hard task, since sociocultural aspects concerning the evaluation of symptoms lead to some etiologic vagueness. Additionally, the large extent of evaluation tools, together with the diversity of therapeutic approaches referred by specialized literature justify the interest of investigating the diverse ways of diagnosing and treating TDA/H by medical doctors, psychologists and psycho-pedagogues developing professional activities in Natal-RN (Brazil) in the assistance of children and teenagers with TDA/H diagnosis hypothesis. A sample of thirty-four professionals participated in this study in a convenience-basis, and submitted to a semi-directed interview. Information from this procedure was analyzed, categorized and submitted to a multidimensional descriptive analysis (cluster analysis procedure), allowing to verify the partition of the sample in two groups: Group 1, basically composed by medical professionals, and Group 2, composed by psychologists and psycho-pedagogues. The categorized variable “Number of sessions” – average time used for arriving to a diagnosis – was the partition-variable showing the larger amount of statistical contribution for the partition, followed by the variables “Professional formation” and “Use of diagnostic tools”. Variables such “Comorbidity”, “TDA/H Definition” and Modalities of Intervention” also showed contribution to the partition obtained, even though their lesser amount of statistical contribution. Despite some similarity between these two groups, data allowed to demonstrate specific association between academic source-formation of the professional concerned and diagnosis and intervention modalities shown by these professionals when dealing with TDA/H. These data confirm relevant heterogeneity in dealing with TDA/H due to professional formation of professionals involved in diagnosis and treatment tasks.

“A gente casa porque nasce!”: um estudo sobre a concepção dos projetos de vida de três gerações de mulheres da Boa Vista dos Negros - Parelhas/RN

This research analyses the individual trajectories of quilombola women from Boa Vista dos Negros, next to the Parelhas city – in the region of Seridó-RN. To this study, our focus (youth and generation) is important to access the feminine universe, the intimacy of home, approaching issues related to the work and to understand family configurations. We aim to perceive the existence of individual projects based on the experiences of three black women generations from distinct family groups. In order to develop this research, the method used is routine and life history analyzes, semi-structured interviews, informal conversations and personal contact due to their participation in the PROEXT/SESU-MEC extension program. The feminine experiences of “hard work” in the agriculture or in the “street”, coping and struggles by the subaltern relationship in their routine as housecleaners create questions related to life experiences and social stigmatizations. The relevancy of this work is to reveal feminine universe into familiar and professional relationships, analyzing individual trajectories, evaluating the social status of women along their lives. In this sense, these narratives of feminine experiences allows the description of the quilombola routine, the life projects of these three women generations, as well as it allows to analyse the changes occurred since the end of the XX century, in particular related to the familiar arrangements.

“A gente casa porque nasce!”: um estudo sobre a concepção dos projetos de vida de três gerações de mulheres da Boa Vista dos Negros - Parelhas/RN

This research analyses the individual trajectories of quilombola women from Boa Vista dos Negros, next to the Parelhas city – in the region of Seridó-RN. To this study, our focus (youth and generation) is important to access the feminine universe, the intimacy of home, approaching issues related to the work and to understand family configurations. We aim to perceive the existence of individual projects based on the experiences of three black women generations from distinct family groups. In order to develop this research, the method used is routine and life history analyzes, semi-structured interviews, informal conversations and personal contact due to their participation in the PROEXT/SESU-MEC extension program. The feminine experiences of “hard work” in the agriculture or in the “street”, coping and struggles by the subaltern relationship in their routine as housecleaners create questions related to life experiences and social stigmatizations. The relevancy of this work is to reveal feminine universe into familiar and professional relationships, analyzing individual trajectories, evaluating the social status of women along their lives. In this sense, these narratives of feminine experiences allows the description of the quilombola routine, the life projects of these three women generations, as well as it allows to analyse the changes occurred since the end of the XX century, in particular related to the familiar arrangements.

Perfil sociodemográfico dos idosos nas capitais do Nordeste e a mortalidade por doenças crônico-degenerativas desse segmento populacional em Natal (RN)

Population aging is a global demographic trend. This process is a reality that merits attention and importance in recent years, and cause considerable impact in terms of greater demands on the health sector, social security and special care and attention from families and society as a whole. Thus, in the context of addressing the consequences of demographic transition, population aging is characterized as a major challenge for Brazilian society. Therefore, this study was conducted in two main objectives. In the first article, variables of socioeconomic and demographic contexts were employed to identify multidimensional profiles of elderly residents in the Northeast capitals, from specific indicators from the 2010 Census information Therefore, we used the Grade of Membership Method (GoM), whose design profiles admits that an individual belongs to different degrees of relevance to multiple profiles in order to identify socioeconomic and demographic factors associated with living conditions of the elderly in the Northeastern capitals. The second article examined the possible relationship between mortality from chronic diseases and socio-economic indicators in the elderly population, of the 137 districts in Natal, broken down by ten-year age groups (60 to 69 years, 70-79 years and 80 and over. The microdata from the Mortality Information System (SIM), was used, provided by the Health Secretariat of Christmas, and population information came from the Population Census 2010. The method refers to the Global and Local Index neighborhood logic (LISA) Moran, whose spatial distribution from the choropleth maps allowed us to analyze the mortality of the elderly by neighborhoods, according to socioeconomic and demographic indicators, according to the presence of special significance. In the first article, the results show the identification of three extreme profiles. The Profile 1 which is characterized by median socioeconomic status and contributes 35.5% of elderly residents in the area considered. The profile 2 which brings together seniors with low socioeconomic status characteristics, with a percentage of 24.8% of cases. And the Profile 3 composing elderly with features that reveal better socioeconomic conditions, about 29.7% of the elderly. Overall, the results point to poor living conditions represented by the definition of these profiles, mainly expressed by the results observed in more than half of the northeastern elderly experience a situation of social vulnerability given the large percentage that makes up the Profile 1 and Profile 2, adding 60% of the elderly. In the second article, the results show a higher proportion of elderly concentrated in the neighborhoods of higher socioeconomic status, such as Petrópolis and LagoaSeca. Mortality rates, according to the causes of death and standardized by the empirical Bayesian method were distributed locally as follows: Neoplasms (Reis Santos, New Discovery, New Town, Grass Soft and Ponta Negra); Hypertensive diseases (Blue Lagoon, Potengi, Redinha, Reis Santos, Riverside, Lagoa Nova, Grass Soft, Neópolis and Ponta Negra); Acute Myocardial Infarction (Northeast, Guarapes and grass Soft); Cerebrovascular diseases (Petrópolis and Mother Luiza); Pneumonia (Ribeira, Praia do Meio, New Discovery, Grass Soft and Ponta Negra); Chronic Diseases of the Lower Way Airlines (Igapó, Northeast and Thursdays). The present findings at work may contribute to other studies on the subject and development of specific policies for the elderly.

Perfil sociodemográfico dos idosos nas capitais do Nordeste e a mortalidade por doenças crônico-degenerativas desse segmento populacional em Natal (RN)

Population aging is a global demographic trend. This process is a reality that merits attention and importance in recent years, and cause considerable impact in terms of greater demands on the health sector, social security and special care and attention from families and society as a whole. Thus, in the context of addressing the consequences of demographic transition, population aging is characterized as a major challenge for Brazilian society. Therefore, this study was conducted in two main objectives. In the first article, variables of socioeconomic and demographic contexts were employed to identify multidimensional profiles of elderly residents in the Northeast capitals, from specific indicators from the 2010 Census information Therefore, we used the Grade of Membership Method (GoM), whose design profiles admits that an individual belongs to different degrees of relevance to multiple profiles in order to identify socioeconomic and demographic factors associated with living conditions of the elderly in the Northeastern capitals. The second article examined the possible relationship between mortality from chronic diseases and socio-economic indicators in the elderly population, of the 137 districts in Natal, broken down by ten-year age groups (60 to 69 years, 70-79 years and 80 and over. The microdata from the Mortality Information System (SIM), was used, provided by the Health Secretariat of Christmas, and population information came from the Population Census 2010. The method refers to the Global and Local Index neighborhood logic (LISA) Moran, whose spatial distribution from the choropleth maps allowed us to analyze the mortality of the elderly by neighborhoods, according to socioeconomic and demographic indicators, according to the presence of special significance. In the first article, the results show the identification of three extreme profiles. The Profile 1 which is characterized by median socioeconomic status and contributes 35.5% of elderly residents in the area considered. The profile 2 which brings together seniors with low socioeconomic status characteristics, with a percentage of 24.8% of cases. And the Profile 3 composing elderly with features that reveal better socioeconomic conditions, about 29.7% of the elderly. Overall, the results point to poor living conditions represented by the definition of these profiles, mainly expressed by the results observed in more than half of the northeastern elderly experience a situation of social vulnerability given the large percentage that makes up the Profile 1 and Profile 2, adding 60% of the elderly. In the second article, the results show a higher proportion of elderly concentrated in the neighborhoods of higher socioeconomic status, such as Petrópolis and LagoaSeca. Mortality rates, according to the causes of death and standardized by the empirical Bayesian method were distributed locally as follows: Neoplasms (Reis Santos, New Discovery, New Town, Grass Soft and Ponta Negra); Hypertensive diseases (Blue Lagoon, Potengi, Redinha, Reis Santos, Riverside, Lagoa Nova, Grass Soft, Neópolis and Ponta Negra); Acute Myocardial Infarction (Northeast, Guarapes and grass Soft); Cerebrovascular diseases (Petrópolis and Mother Luiza); Pneumonia (Ribeira, Praia do Meio, New Discovery, Grass Soft and Ponta Negra); Chronic Diseases of the Lower Way Airlines (Igapó, Northeast and Thursdays). The present findings at work may contribute to other studies on the subject and development of specific policies for the elderly.

O sistema aquífero Barreiras na região de Parnamirim, RN: uso das águas e potencialidades

The study area is within the Pirangi River Basin, eastern sector of Rio Grande do Norte state, where is located of the Parnamirim city. It has an area of approximately 370 km². Urbanization has developed much fast without an appropriate infrastructure, mainly by the lack of sewage systems, with risks of contamination of groundwater that may cause serious damage to the health of the population. The Barreiras Aquifer System groundwater in the area represents the main source of water supply for urban and rural populations. The use of groundwater occurs without adequate planning and therefore, important recharge areas are being occupied. This study was conducted to quantify the use and evaluation of the potential of groundwater, in order to increase good water quality supply and lower risks of being affected by polluting activities. With these objectives, the following activities were carried out: 268 points of water have been registered; characterization of the lithological, thickness and hydrogeological structure of the Barreiras aquifer, based on the correlation of well logs; and evaluation of hydrodynamic parameters of the aquifer, from the interpretation of results well pumping tests. It was found that the saturated thickness increases from west to east towards the sea, with values ranging from 15,47-56,5 m with an average of 32,45 m. The hydrodynamic parameters using Cooper-Jacob method were: average transmissivity of 5,9x10-3 m²/s and average hydraulic conductivity 2,82x10-4 m/s. The effective porosity is of 15%, obtained by applying Biecinski equation. The potentiometric map shows the main direction of groundwater flow, from west to east, and identifies the recharge areas corresponding to the region of the tablelands of the "Barreiras". The river valleys refer to the discharge areas of the aquifer system. The Recharge was estimated at 253 mm/year, which corresponds to the 16.4% rate of infiltration.

O sistema aquífero Barreiras na região de Parnamirim, RN: uso das águas e potencialidades

The study area is within the Pirangi River Basin, eastern sector of Rio Grande do Norte state, where is located of the Parnamirim city. It has an area of approximately 370 km². Urbanization has developed much fast without an appropriate infrastructure, mainly by the lack of sewage systems, with risks of contamination of groundwater that may cause serious damage to the health of the population. The Barreiras Aquifer System groundwater in the area represents the main source of water supply for urban and rural populations. The use of groundwater occurs without adequate planning and therefore, important recharge areas are being occupied. This study was conducted to quantify the use and evaluation of the potential of groundwater, in order to increase good water quality supply and lower risks of being affected by polluting activities. With these objectives, the following activities were carried out: 268 points of water have been registered; characterization of the lithological, thickness and hydrogeological structure of the Barreiras aquifer, based on the correlation of well logs; and evaluation of hydrodynamic parameters of the aquifer, from the interpretation of results well pumping tests. It was found that the saturated thickness increases from west to east towards the sea, with values ranging from 15,47-56,5 m with an average of 32,45 m. The hydrodynamic parameters using Cooper-Jacob method were: average transmissivity of 5,9x10-3 m²/s and average hydraulic conductivity 2,82x10-4 m/s. The effective porosity is of 15%, obtained by applying Biecinski equation. The potentiometric map shows the main direction of groundwater flow, from west to east, and identifies the recharge areas corresponding to the region of the tablelands of the "Barreiras". The river valleys refer to the discharge areas of the aquifer system. The Recharge was estimated at 253 mm/year, which corresponds to the 16.4% rate of infiltration.