A pedogeomorfologia em ambiente semiárido paraibano, Brasil
Pedogeomorphology is defined as the study of the soil-relief relationship under different aspects: conceptual, methodological, operational and/or scalar. In landscapes, soils and reliefs, evolve together, with mutual influences in this process, constantly, one influences the other in different wa...
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| Formato: | Dissertação |
| Idioma: | pt_BR |
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Universidade Federal do Rio Grande do Norte
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| Endereço do item: | https://repositorio.ufrn.br/handle/123456789/55077 |
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| Resumo: | Pedogeomorphology is defined as the study of the soil-relief relationship under
different aspects: conceptual, methodological, operational and/or scalar. In
landscapes, soils and reliefs, evolve together, with mutual influences in this process,
constantly, one influences the other in different ways, in greater or lesser intensity,
depending on the environmental context, resulting in landscape implications and
complex pedogeomorphological processes. Knowledge regarding the physical
environment is essential to guide territorial planning policies, environmental
preservation and recovery of degraded areas. The Brazilian semi-arid is considered a
fragile region from an environmental point of view, due to the occurrence of torrential
rains, long periods of more exposed soils, large thermal amplitudes, among others.
The region still lacks scientific information that allows for a deeper understanding of its
dynamics. The objective of this work was to carry out a pedogeomorphological
characterization of the RPPN Olho d'água das Onças, located in the municipality of
Picuí-PB, in the Brazilian semi-arid region. The geological substrate of the study area
is associated with the Serra do Martins Sedimentary Formation (ENsm), with the
occurrence of conglomerates, sandstones, siltstones, claystones and laterites. A
bibliographical and cartographic review of the region under analysis was carried out.
For the characterization of the RPPN, cartographic products were elaborated in a GIS
environment, using the QGIS software. The ALOS-PALSAR satellite image was used
as a basis. Products such as: MDE, slope map, hypsometry were elaborated and from
this information the geomorphological map was made. Field work was carried out with
collections of seven soil profiles, representing different geomorphological
compartments. Five geomorphological units were identified in the area: i) tableland, ii)
escarpment, iii) valley with flat bottom, iv) structural valley, and v) river plain. The
pedogeomorphological characterization of the RPPN provides relevant information for
future preparation of the Management Plan for the Conservation Unit. The identification
of geomorphological units and associated soils enabled a better understanding of the
potential and vulnerabilities of each sector. Areas with tableland and Oxisols
(Latossolos) are the most appropriate for creating zones of intensive use. In turn,
greater care must be taken with the edges of the tableland, with high declivity and
associated with poorly developed soils |
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