http://repositorio.ufc.br/handle/riufc/366 2026-07-15T15:50:54Z 2026-07-15T15:50:54Z Holanda, Débora Maciel Castelo http://repositorio.ufc.br/handle/riufc/87132 2026-07-15T13:35:49Z 2026-01-01T00:00:00Z

Título: Extração automática de nascentes a partir de modelos altimétricos: avaliação da influência da resolução espacial e do tipo de modelo Autor(es): Holanda, Débora Maciel Castelo Abstract: Springs are essential hydrogeomorphological environments for hydrological dynamics, biodiversity conservation, and human water supply. Despite their environmental and social relevance, they remain largely underrepresented in spatial mapping, compromising management and conservation efforts. Discussions on spring mapping are often accompanied by the challenge of defining a reliable methodology for detecting these features in the landscape. In this context, this doctoral thesis aimed to evaluate the application of an automatic extraction method as a supporting tool for spring identification. Specifically, it analyzed the influence of spatial resolution and elevation model type on the automatic extraction of springs through the generation of Hydrologically Conditioned Digital Elevation Models (HCDEMs). Four Digital Elevation Models (NASADEM, COPDEM, SRTM/ASF, and TanDEM-X) and two Digital Terrain Models (ANADEM and FABDEM), all derived from radar interferometry, with spatial resolutions of 12 m, 12.5 m, and 30 m, were employed. The study was conducted in three experimental areas located in the Baturité Massif, Ceará State, Brazil. Automatic spring extraction was performed in the QGIS environment using the SAGA GIS tool. The results were evaluated based on an adapted completeness analysis, following the Technical Specification for Geospatial Data Quality Control (ET-CQDG), using georeferenced field survey data as reference. This approach enabled the assessment of both the spatial correspondence and the operational usefulness of the extracted data. The results indicated better performance for models with higher spatial resolution, although no consistent superiority was observed between Digital Elevation Models and Digital Terrain Models. The best performance was found in the Bananal area, associated with gentler relief and higher moisture conditions, whereas the Ouro and Rolador areas, characterized by steeper terrain, presented greater limitations for spring identification. These findings demonstrate the potential of high- resolution orbital elevation models for supporting automatic spring extraction. Therefore, this study highlights the promising application of altimetric models in identifying priority areas for the detection and investigation of spring environmental systems. Tipo: Tese

2026-01-01T00:00:00Z Suarez, Andrea Fabiana http://repositorio.ufc.br/handle/riufc/86573 2026-06-02T14:47:38Z 2025-01-01T00:00:00Z

Título: Acaparamiento verde y transicion energetica justa: analisis de casos en Latinoamerica Autor(es): Suarez, Andrea Fabiana Tipo: Dissertação

2025-01-01T00:00:00Z Ramos, Myrna Lorena Lima http://repositorio.ufc.br/handle/riufc/86511 2026-05-27T20:28:24Z 2022-01-01T00:00:00Z

Título: “Na calçada, pra planejar, pra sonhar”: a espacialização do movimento dos atingidos por barragens no Ceará Autor(es): Ramos, Myrna Lorena Lima Abstract: Water and energy are fundamental resources for the capital accumulation, especially at the present moment of its development. At the same time, the main means of obtaining these resources are responsible for promoting attempts at domination and producing spaces for capital reproduction. However, the spatialization of these attempts of domination does not occur without resistance, and these processes of resistance also have spatialities. In light of the above, the Movement of People Affected by Dams (MAB) has been, since the year of its nationalization in 1991, the most expressive representative of the struggle of those affected and affected by dams in Brazil. In this research, I present the genesis of MAB in Ceará, which was born with the construction of the Castanho Dam. The dam work, carried out between 1995 and 2003, planned during the Government of Changes in the 1980s, reached the municipalities of Jaguaribara, Jaguaribe, Jaguaretama and Alto Santo. I also present how the spatialization of MAB occurred in the State from the implementation of technical objects in space and the formation of Movement’s Regions of action. Cast as the general objective of the research in development to discuss the process of spatialization of the Movement of People Affected by Dams in the State of Ceará. I have as specific objectives to interpret the birth process of MAB in Ceará; understand the specificity of MAB in Ceará from a scalar perspective and understand which are the spaces built by MAB in the state. The methodology of this research is divided into three stages. The first corresponds to the bibliographical survey of the material already produced about the study and documentary research; the second stage is carrying out exploratory field work associated with non-structured focused interviews and participant observation (MARCONI and LAKATOS, 2003); and the third stage corresponds to the transcription of the interview audios, information’s organization obtained from the documentary research and writing of the dissertation. This dissertation contains five chapters: The first presents an introduction about the subject studied; In the second chapter I present the theoretical basis used in the research reported here. In the third chapter I discuss the birth of the MAB in Brazil and the scalar performance of the Movement; Finally, I present the process of emergence and spatialization of the MAB in Ceará, highlighting the regions where the Movement operates in the state and the conception of the region of action taken by the MAB in Ceará. Tipo: Dissertação

2022-01-01T00:00:00Z Gomes, Nicole Lopes http://repositorio.ufc.br/handle/riufc/85937 2026-04-22T19:05:50Z 2025-01-01T00:00:00Z

Título: Impactos da erosão costeira na praia do Batoque, Ceará, Brasil Autor(es): Gomes, Nicole Lopes Abstract: Coastal erosion is a dynamic process that compromises the environmental integrity of coastal areas and directly impacts the livelihoods of traditional communities. At Praia do Batoque, located within the Batoque Extractive Reserve (RESEX) in Aquiraz (CE), intense morphodynamic changes have been observed over the past decades, affecting artisanal fishing, the main local economic activity. This research aimed to analyze the spatio-temporal variation of the coastline between the years 2003 and 2025, using the DSAS (Digital Shoreline Analysis System) with the End Point Rate (EPR) and Linear Regression Rate (LRR) methods. The results indicated significant rates of coastline retreat in the studied sector, with maximum erosion values exceeding -4 m/year in some sections. The multitemporal comparison revealed the replacement of natural features by degraded areas, as well as the advance of mobile dunes over buildings, with residential losses reported by the local population. The loss of post-beach areas used for boat resting and fish trade was observed, compromising the practice of artisanal fishing. The improvised use of materials to try to contain erosion, vehicle traffic in sensitive areas such as turtle nesting sites, and the increase of anthropization in zones classified as maximum protection were also noted. The research highlights the urgency of integrated management actions, emphasizing public policies aimed at protecting traditional communities and preserving coastal ecosystems. The Batoque RESEX, although legally established, lacks effective management instruments that ensure its ecological and sociocultural functionality, such as increased local supervision. Tipo: Dissertação

2025-01-01T00:00:00Z