PRODEMA https://repositorio.ufpb.br/jspui/handle/tede/4452 2026-05-23T01:18:50Z 2026-05-23T01:18:50Z Florêncio, Helayne Luiza de Sousa https://repositorio.ufpb.br/jspui/handle/123456789/38095 2026-05-18T06:07:53Z 2026-02-24T00:00:00Z

Título: Secas no semiárido paraibano análise de extremos pluviométricos e vulnerabilidade nos municípios de Picuí, Sousa e Sumé Autor(es): Florêncio, Helayne Luiza de Sousa Orientador: Filgueira, Hamilcar José Almeida Abstract: Climate change corresponds to persistent alterations in climate patterns, evidenced by variations in temperatures, in the frequency of extreme events, and in the functioning of atmospheric and oceanic systems, affecting ecosystems and human activities at different scales. In this context, semi-arid regions tend to show greater sensitivity to climate variability, particularly regarding water availability and the occurrence of droughts. Given this scenario, the main objective of this study was to analyze the behavior of the rainfall regime and drought vulnerability in the municipalities of Picuí, Sousa, and Sumé, located in the semi-arid region of the state of Paraíba, Brazil. The adopted methodology included the analysis, for the period from 1994 to 2023, of the Consecutive Dry Days Index (CDD) and the Consecutive Wet Days Index (CWD), as well as the statistical analysis of time series using the Mann-Kendall, Sen’s slope, and Pettitt tests. In addition, drought vulnerability was calculated through a composite index structured from indicators of exposure, sensitivity, and adaptive capacity. The results indicate few consecutive days with precipitation, highlighting the municipality of Sousa, with a maximum value of nine CWD in the years 2008, 2018, and 2020. On the other hand, long drought intervals were observed, particularly in Sumé, which recorded nearly one year of CDD. A statistically significant increasing trend in CDD was observed in the municipality of Sumé, indicating an intensification of dry periods over time, while Picuí and Sousa did not show defined trends. The analysis also revealed low water recovery capacity after dry periods, especially in Picuí and Sumé. The drought vulnerability assessment pointed to differences among the municipalities, with higher vulnerability in Sumé, associated with the intensification of dry periods and adaptive limitations, and relatively lower vulnerability in Sousa, influenced by lower sensitivity and support from external water infrastructure. It is concluded that drought vulnerability in these municipalities is strongly conditioned by the temporal irregularity of rainfall and by how the territories are structured to respond to climate extremes, reinforcing the need for integrated and territorially differentiated adaptive strategies. Editor: Universidade Federal da Paraíba Tipo: Dissertação

2026-02-24T00:00:00Z Sousa, Natália Duarte de https://repositorio.ufpb.br/jspui/handle/123456789/38091 2026-05-18T06:07:40Z 2026-02-24T00:00:00Z

Título: Eventos extremos de chuva e soluções baseadas na natureza no município de João Pessoa, Paraíba, Brasil Autor(es): Sousa, Natália Duarte de Orientador: Filgueira, Hamilcar José Almeida Abstract: This study analyzed the relationship between Nature-based Solutions (NbS), Extreme Rainfall Events (ERE), and Disaster Risk Reduction (DRR), combining a bibliometric review of the literature with a spatiotemporal analysis of rainfall variability in the municipality of João Pessoa, Paraíba, Brazil, as well as a comparative analysis between the municipalities of João Pessoa and Guimarães, Braga, Portugal. This review allowed us to consolidate a theoretical framework on NbS and deepen its application in the context of urban flooding, highlighting an exponential growth in global scientific production in the last decade, especially between 2021 and 2025, reflecting the recognition of NbS as sustainable alternatives to conventional infrastructure in the face of climate change. Based on climatological analysis, it was found that the highest daily rainfall volumes and the highest frequency of ERE in João Pessoa are concentrated in areas close to the coast, associated with climatic patterns such as La Niña and/or Negative Dipole, which favor the occurrence and intensification of rainfall. Although no statistically significant trend of increase or decrease in average annual rainfall and ERE was identified, at least one extreme event has occurred annually over the last 15 years, but this is not always associated with hydrometeorological disasters, highlighting the role of socio- environmental and infrastructure factors in determining risk. It has been noted that NbS are highly adaptable and multifunctional, with the potential to strengthen urban resilience, sustainability, and innovation in public policies when implemented in an integrated and participatory manner. Experiences in Guimarães and João Pessoa have demonstrated their contribution to mitigating floods and flooding, although their implementation in Brazil is still sporadic and poorly integrated. João Pessoa's potential to expand green areas, reduce impervious surfaces, restore urban rivers, implement eco-trails and green corridors, and strengthen participatory processes is noteworthy. The study also highlighted the importance of institutional structures, such as research laboratories and environmental education, for integrating actions between public authorities, universities, and civil society, enabling testing, climate monitoring, and community engagement. It was concluded that the research contributed to the advancement of knowledge on NbS applied to ERE and DRR, reinforcing the need for future studies with quantitative modeling to assess their effectiveness and support João Pessoa's adaptive planning in the face of the climate emergency, considering NbS as efficient, economical, and sustainable alternatives for DRR. Editor: Universidade Federal da Paraíba Tipo: Dissertação

2026-02-24T00:00:00Z Silva, Ingrid Almeida da https://repositorio.ufpb.br/jspui/handle/123456789/37848 2026-03-10T06:04:53Z 2018-03-29T00:00:00Z

Título: A floresta nacional de Restinga\PB e sua influência nas condições microclimáticas de áreas adjacentes Autor(es): Silva, Ingrid Almeida da Orientador: Santos, Joel Silva dos Abstract: The metropolitan region of João Pessoa, in Paraíba, underwent a process of disordered urban growth, profoundly transforming the use and occupation of the soil, reducing mainly the Atlantic Forest. In this region there is a fragment occupied by the Conservation Unit (UC) called the National Forest (Flona) of Restinga de Cabedelo. The main objective of the present study is to investigate the role of vegetation in mitigating the urban heat islands of the study area. At first, an analysis of the city's general climatology was carried out using a 30-year historical series of data on temperature, relative air humidity, wind velocity and precipitation using data from an INMET station located in João Pessoa. Posteriorly, air temperature and relative humidity were measured during the months of January to March (dry period) using a Hobo® thermohygrometer U10-003 at 5 experimental points in the study area. These points were distributed in the urban area-FLONA, with three points located in the urban network and two located in the forest with three monitoring points in the urban area and two within the forest itself. For the calculation of the urban heat island, a reference point P05, located in Flona, was used, from which the values were calculated, and afterwards its magnitude was classified. And Thom's thermal index of discomfort was also calculated. The results allowed to characterize the microclimate of the study area and to identify that the environmental changes provoked by the urbanization process directly affect the temperature and relative humidity of the air, as well as in the formation and intensity of heat island. The points located in the urban area P01, P02 presented the highest temperatures, heat islands and IDT, and P03 (closest to the forest) had lower values. On the other hand, P04 and P05 presented the best conditions of temperature, relative humidity and thermal comfort. In this way, a thermal gradient was obtained, where as the monitored points approached the forest, the temperature, islands of heat and thermal discomfort decrease and the relative humidity of the air increases. Editor: Universidade Federal da Paraíba Tipo: Dissertação

2018-03-29T00:00:00Z Barbosa, Êmille Natane de Araújo https://repositorio.ufpb.br/jspui/handle/123456789/37785 2026-03-04T06:12:39Z 2017-07-03T00:00:00Z

Título: É sustentável? Uma análise dos cultivos de macroalgas marinhas no estado do Rio Grande do Norte Autor(es): Barbosa, Êmille Natane de Araújo Orientador: Miranda, George Emmanuel Cavalcanti de Abstract: The seaweed cultivation has been encouraged as an alternative to harvesting in natural beds as well as being a possibility of generating income, reducing the exodus, unemployment, family breakdown and valuation of women's role in generating income and participation of community organization. The aim of this study was to evaluate the sustainability of seaweed aquaculture of Rio Grande do Norte. The analysis considered socioeconomic, technological, and environmental aspects. The research was characterized as a case study, which qualitative and quantitative parameters were evaluated. Data were collected through semi-structured interviews, directed to the seaweed farmers, the presidents of the mariculture associations and aquaculture specialists. The collected data were used to characterize the associations, to identify the socioeconomic profile of the farmers, and to calculate the IDES, ICS, IT, IA and IS indexes. To improve the cultivation technique of Crassiphycus birdiae, an experiment was carried out using the nutrient pulse method. Thirteen treatments were tested, one control and 12 resulting from combinations of four concentrations (0.75 ml/L; 1.5 ml/L; 3.0 ml/L; 6.0 ml/L) of an agricultural fertilizer (VitanTM) and three exposure periods (12h; 24h; 48h). After the period of exposure to the nutrient pulse, the propagules were grown in sterilized seawater for four weeks. The effect of nutrient pulse on growth rate was analysed. The obtained results in the sustainability analysis of the mariculture activity were: High-level Index of Economic and Social Development (IDES – 0.931); Medium level Index of Social Capital (ICS – 0.759); High-level Index of Technology (IT – 0.836); Medium level Index of Environment (IA – 0.633) and medium level Index of Sustainability (IS – 0.790). In assessing the nutrient pulse effect, a progressive increase in the values of fresh biomass and growth rate was observed in all treatments, except for T13, treatment with higher concentration and higher period of exposure fertilizer. The highest increase in fresh biomass and growth rate was found in the T3 treatment (1.5ml/L; 12h), however the statistical analysis did not show any significant difference. Editor: Universidade Federal da Paraíba Tipo: Dissertação

2017-07-03T00:00:00Z