DSpace Communidade:http://repositorio.ufc.br/handle/riufc/3142026-06-09T22:38:37Z2026-06-09T22:38:37ZAs mudanças climáticas e os desafios da gestão de águas subterrâneas no Estado do CearáCastelo Branco, Gabriel Pimenta de Novaeshttp://repositorio.ufc.br/handle/riufc/865172026-05-27T22:05:40Z2026-01-01T00:00:00ZTítulo: As mudanças climáticas e os desafios da gestão de águas subterrâneas no Estado do Ceará
Autor(es): Castelo Branco, Gabriel Pimenta de Novaes
Abstract: Climate change has been causing significant alterations in precipitation patterns, temperature,
and evapotranspiration, directly affecting the hydrological cycle and, consequently, the
availability of groundwater. In the State of Ceará, located in the Brazilian semi-arid region,
these impacts become even more relevant given the strong dependence on aquifers for human
supply, agriculture, and other economic activities. The intensification of extreme events, such
as prolonged droughts, combined with the unregulated use of water resources, poses complex
challenges for the sustainable management of groundwater in the region. This study analyzes
the main conflicts and challenges related to groundwater management in Ceará, based on the
application of the DPSIR Matrix (Driving Force – Pressure – State – Impact – Response) across
the twelve hydrographic regions of the state. The analysis highlights significant conflicts, such
as the unregulated drilling of wells, limitations in the control and management of groundwater
permits, pollution and contamination by waste (nitrates, inorganic fertilizers, and pesticides),
as well as the fragility of institutional governance.As a result, a general DPSIR matrix was
developed, encompassing the characteristics and issues of the entire territory of Ceará. In
addition, seven specific matrices were created, focused on the main hydrogeological domains
of the different hydrographic regions, allowing for a more detailed and contextualized analysis
of local dynamics.In this context, the research also seeks to estimate the effects of climate
change on water availability in the Dunas/Paleodunas aquifer system in the Metropolitan
Region of Fortaleza, with a particular focus on the municipalities of Paracuru and São Gonçalo
do Amarante. Based on historical climatological data on precipitation and temperature, and
through the application of the Climatic Water Balance method, effective infiltration was
estimated for the period from 1977 to 2024. For the municipality of Paracuru, a value of 344.60
mm/year was obtained, while for São Gonçalo do Amarante the estimated value was 183.50
mm/year.Additionally, using the Water Table Fluctuation method (Δh), a renewable reserve of
approximately 39 million m³ was estimated for an area of 78.55 km², corresponding to the
outcropping zone of the aquifer.Based on projections from CMIP6 climate models applied to
the study area, considering the SSP2-4.5 and SSP5-8.5 scenarios, future climatological data
were obtained and effective infiltration values were estimated from 19 models, covering three
time intervals (2025–2050, 2051–2075, and 2076–2100). For the period from 2025 to 2050,
under the most critical scenario, the results indicate a 6% increase in average temperature and
a 55% reduction in average effective infiltration. In the following interval (2051–2075), under
the same scenario, there is an 11% increase in average temperature and an 86% reduction in
effective infiltration. For the period from 2076 to 2100, the models indicate an average
reduction of 98% in the worst-case scenario (SSP5-8.5) in the effective recharge of the aquifer
system, highlighting potentially severe impacts on its renewal capacity.
Tipo: Dissertação2026-01-01T00:00:00ZEstudo da remediação de alterabilidades nos principais quartzitos ornamentais do CearáLopes, Renata de Oliveirahttp://repositorio.ufc.br/handle/riufc/857902026-04-14T12:02:45Z2025-01-01T00:00:00ZTítulo: Estudo da remediação de alterabilidades nos principais quartzitos ornamentais do Ceará
Autor(es): Lopes, Renata de Oliveira
Abstract: The growing demand for natural materials with high strength and distinctive aesthetics has driven the use of Brazilian ornamental quartzites in the construction industry. However, the performance of these materials when exposed to everyday chemical agents, particularly in domestic environments, still requires detailed investigation. In this context, the present research aimed to investigate the physicochemical alterability of three commercial varieties of
quartzite from Ceará — Perla Santana, Cristallo Pink, and Taj Mahal — focusing on aesthetic degradation processes and the effectiveness of remediation methods. The methodology adopted was multidisciplinary, involving standardized tests (gloss, porosity, density, and absorption), physico-structural analyses (PUNDIT and SEM/EDS), and application/removal tests with chemical agents (KOH, HCl, NaCl, sodium hypochlorite, paints, among others).
Samples were initially polished in a standardized manner and subsequently subjected to the controlled action of reagents over varying periods, simulating different scenarios of use and exposure. In gloss measurements, performed with a 60° glossmeter, KOH caused the greatest losses, exceeding 16% in some samples, particularly in Cristallo Pink. Sodium hypochlorite produced an almost negligible visual impact, indicating a distinct surface behavior.
Colorimetric analyses in the CIELAB scale revealed significant variations in the L, a, and b* parameters, with ΔE values exceeding 3, a threshold perceptible to the human eye. Structural analysis by PUNDIT testing demonstrated a correlation between wave propagation velocity and microstructural integrity. Compact and minimally altered zones exhibited velocities above 4000 m/s, whereas values below 2500 m/s indicated microcracks and internal heterogeneity. SEM analyses revealed scaly structures, oriented laminae, and fracture filling by secondary minerals such as kaolinite and micas, while EDS confirmed high aluminum and potassium contents consistent with muscovite and altered feldspars. In the remediation stage, scouring powder, citric acid, sodium bicarbonate, vinegar, and lemon juice were tested. Organic stains responded more effectively to organic acids, and scouring powder proved effective in removing paints. Stain depth and exposure time to aggressive reagents were decisive factors in cleaning efficiency. The results indicate a strong relationship between porosity, microcracking, and susceptibility to aesthetic alteration. Rocks with higher porosity exhibited greater gloss losses and colorimetric changes, suggesting that pore connectivity facilitates the penetration of aggressive agents. Thus, the chemical resistance of quartzites depends not only on mineralogical composition but also on physical integrity, grain size distribution, foliation orientation, and degree of compaction. It is concluded that the integrated approach adopted provides a robust technical assessment of the aesthetic durability of quartzites from Ceará in domestic applications, offering valuable insights for the ornamental stone sector. For future perspectives, the application of XRD, X-ray tomography, and accelerated aging tests is recommended to deepen the understanding of the evolution of these rocks under different usage conditions.
Tipo: Dissertação2025-01-01T00:00:00ZAvaliação para o uso turístico do geossítio Morro do Pendurado, no Parna Ubajara-CEAlmeida, Chrissandro Marques dehttp://repositorio.ufc.br/handle/riufc/847472026-02-12T13:12:57Z2025-01-01T00:00:00ZTítulo: Avaliação para o uso turístico do geossítio Morro do Pendurado, no Parna Ubajara-CE
Autor(es): Almeida, Chrissandro Marques de
Abstract: The use of caves by human groups dates back to prehistoric periods. Currently, these
environments are established as one of the most important and visited geotourism resources
globally, as they offer exceptional educational and touristic value due to their unique attributes.
In Ubajara National Park (PNU), located 337 km west of the capital Fortaleza, in the state of
Ceará, caves constitute the main tourist attraction. In this context, this work aims to evaluate
the touristic potential of the Morro do Pendurado Geosite, situated within the PNU, in order to
diversify the park's tourist itineraries, aligning with the objectives of its management plan.
The geosite assessment was based on the methodology by Brilha (2016), complemented
by the methods of Vujičić et al. (2011) and Ziemann and Figueró (2017). This integrated
approach aimed to consider the specificities of speleological heritage for tourism. In addition
to the qualitative assessment, a comparative quantitative analysis was conducted. For this
purpose, Brilha's (2016) proposal was applied in isolation and, in parallel, an adapted version
incorporating elements from the other two methods.
The results demonstrated that the complementary methodologies were relevant, as they
added greater detail to the qualitative assessment regarding the criteria of Scenic
Beauty/Landscape, Interpretative Potential, and Accessibility. The quantitative comparison
revealed significant changes compared to the isolated application of Brilha (2016). These
additions positively impacted the scores in specific criteria: in Scenic Beauty, by formally
highlighting the landscape attributes; and in Accessibility, by accounting for the existing tourist
infrastructure. Furthermore, the method pointed out important improvements for interpretative
services, such as the creation of promotional material and installation of interpretative panels,
which are in the implementation phase in the park for this geosite.
The adapted assessment in this work allowed for the identification of attractive attributes
for visitors, such as: the more primitive and exploratory experience, with individual helmets
and lights in small groups; the contact with the geomorphology and karst landscape, which
includes attractions in the external portion of the hill, in the lapiaz field, and inside the caves,
with their various chambers and speleothems; and, finally, the appreciation of the
paleontological collection found in the caves, whose information is available at the visitor center.
The visit to the geosite offers the tourist a geochronological window, considering the entire
context, from the Precambrian to the present day. Additionally, the research results support the
proposal to open new caves for visitation, as provided for in the Public Use Plan of Ubajara
National Park.
Tipo: Dissertação2025-01-01T00:00:00ZGeoconservação da formação ipu: inventário e diretrizes para proteção dos sítios paleontológicosLima, Thiago de Albuquerquehttp://repositorio.ufc.br/handle/riufc/844462026-03-23T19:34:13Z2025-01-01T00:00:00ZTítulo: Geoconservação da formação ipu: inventário e diretrizes para proteção dos sítios paleontológicos
Autor(es): Lima, Thiago de Albuquerque
Abstract: The paleontological sites of the Ipu Formation, part of the Serra Grande Group of the
Parnaíba Basin, hold high scientific and educational relevance but face threats from
anthropogenic degradation, lack of conservation policies, and limited recognition by local
communities and public administrators. This study conducted an inventory of these sites to
propose geoconservation strategies aimed at their protection and valorization, integrating
paleontological heritage preservation with sustainable development. A bibliographic review,
geological map analysis, and preliminary fossil site identification were carried out. The sites
were then characterized in the field through georeferencing, geological description,
vulnerability analysis, and conservation status assessment. A quantitative evaluation was
performed using the GEOSSIT platform to determine scientific value, degradation risk, and
educational and touristic potential. Nine sites were inventoried across four municipalities in
northwestern Ceará, with the Zipu and Contra Fogo sites in Pacujá standing out due to their
high scientific and educational relevance but also their vulnerability. In response to the
identified threats, specific geoconservation guidelines were proposed for Pacujá, including the
integration of territorial planning, environmental education, and geotourism. These initiatives
involve training local tour guides, creating a tour guide association, and establishing
partnerships with schools and universities. It is suggested that these guidelines be replicated in
other municipalities within the study area to expand the positive impacts of geoconservation.
The study concludes that integrating geoconservation into territorial planning is essential for
preserving paleontological sites, enhancing their scientific, cultural, and economic value, and
strengthening local communities.
Tipo: Dissertação2025-01-01T00:00:00Z