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Previous issue date: 2012-02-09 / Universidade Federal do Rio Grande do Norte / The semi-arid Northeast region are coming through changes since its formation causing
changes in the landscape and increased degradation. The economic dynamics which was
established at the Potiguar semiarid had for a long time settled in livestock, subsistence
agriculture and cotton, however, these economies decline from the year 1970. Thus, the
Potiguar spaces are undergoing by a process of space reordering marked by the growth of
agricultural activities and the process of urbanization. In the Potiguar western region these
changes weaken significantly transform the landscape. In these areas, the process of
urbanization and agricultural activities have caused changes in the hinterland landscape
changing the natural dynamics of the caatinga biome that has been subject to negative
interference with the indiscriminate removal of vegetation. In this case, the specific study area
of the watershed of Cajazeiras Creek located in the cities of Pau dos Ferros, ?gua Nova,
Encanto and Rafael Fernandes, changes in the landscape has led to degradation and
environmental fragility. From this perspective, the research objective is to assess the
dynamics of the landscape of the watershed of Cajazeiras Creek, semiarid region of the state
of Rio Grande do Norte, identifying the degrading factors, the most degraded areas and/or
susceptible to degradation and environmental fragility. The research investigated the
phenomena of light geosystems theory that emphasizes the integration of elements in shaping
the landscape. During this reporting period, it was carried out exploratory and bibliographical
research, and geoprocessing techniques to assess the social and environmental conditions of
the researched area and its environmental fragility. To do so, first, it was made an
multitemporal analisis on the basis of the years 1984, 1996 and 2009 demonstrating that the
dynamics of use and land cover in the watershed of Cajazeiras Creek showed a significant
change in the landscape, especially in the caatinga vegetation. This has been recovering in
various areas of the watershed, especially in its upper course in the mountains of Bom Sera, in
Encanto city. The analysis showed the need to develop policies and programs for the
maintenance, restoration and preservation of the caatinga vegetation of the river network and
of water bodies. In addition, it was identified the most degraded areas of the watershed,
environmental fragility and potential emerging that take into account the landscape
components such as climate, topography, geology, pedology, geomorphology and the use and
occupation of the soil in an integrated manner. The results show that the landscape of the
watershed has medium and high environmental fragility throughout its area, especially on the
banks of the river network provided by the use and occupation of the soil in an inadequate
way with the environmental conditions of the watershed / O semi?rido nordestino vem passando por mudan?as desde sua forma??o acarretando
transforma??es na paisagem e aumento da degrada??o. A din?mica econ?mica que se
estabeleceu no semi?rido potiguar durante muito tempo esteve assentada na pecu?ria,
agricultura de subsist?ncia e algod?o, entretanto, essas economias declinam a partir dos anos
de 1970. Desse modo, os espa?os potiguares est?o passando por um processo de
reordenamento espacial marcado pelo crescimento das atividades agropecu?rias e pelo
processo de urbaniza??o. Na regi?o do oeste potiguar tais mudan?as fragilizam e transformam
significativamente a paisagem. Nessas ?reas, o processo de urbaniza??o e a atividade
agropecu?ria t?m provocado mudan?as na paisagem sertaneja alterando a din?mica natural do
Bioma Caatinga que passou a sofrer interfer?ncias negativas com a retirada indiscriminada da
vegeta??o. No caso, espec?fico da ?rea em estudo a microbacia do Riacho Cajazeiras
localizada nos munic?pios de Pau dos Ferros, ?gua Nova, Encanto e Rafael Fernandes as
altera??es na paisagem tem provocado a degrada??o e a fragilidade ambiental. Nessa
perspectiva, o objetivo da pesquisa consiste em avaliar a din?mica da paisagem da microbacia
do Riacho Cajazeiras, semi?rido potiguar, identificando os fatores degradantes, ?s ?reas mais
degradadas e/ou suscept?veis a degrada??o e as fragilidades ambientais. A pesquisa investigou
os fen?menos a luz da teoria geossist?mica que enfatiza a integra??o dos elementos na
forma??o da paisagem. Para a realiza??o do trabalho foram realizadas as pesquisa
explorat?ria, bibliogr?fica, o trabalho de campo e t?cnicas de geoprocessamento para avaliar
as condi??es socioambientais da ?rea de pesquisa e sua fragilidade ambiental. Para tanto,
primeiramente, foi feito uma analise multitemporal com base nos anos de 1984, 1996 e 2009
demonstrando que a din?micade do uso e da ocupa??o do solo na microbacia do Riacho
Cajazeiras mostrou uma mudan?a significativa na paisagem, especialmente, na vegeta??o de
caatinga. Esta vem se recuperando em varias areas da microbacia, principalmente, em seu alto
curso nas Serras do Bom Sera, do Encanto. A an?lise mostrou a necessidade de desenvolver
pol?ticas e programas voltados para a manuten??o, recupera??o e preserva??o da vegeta??o de
caatinga da rede fluvial e dos corpos d ?gua. Al?m disso, foram identificadas as ?reas mais
degradadas da microbacia e a fragilidade ambiental potencial e emergente que levam em
considera??o os componentes da paisagem tais como: clima, relevo, geologia, pedologia,
geomorfologia e uso e ocupa??o do solo de forma integrada. Os resultados mostram que a
paisagem da microbacia apresenta fragilidade ambiental m?dia e alta em toda sua ?rea,
destacando-se, nas margens da rede fluvial proporcionada pelo o uso e ocupa??o do solo de
forma inadequada com as condi??es ambientais da microbacia
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/18228 |
| Date | 09 February 2012 |
| Creators | Batista, Jos? Pio Granjeiro |
| Contributors | CPF:20610700430, http://lattes.cnpq.br/3687987476428917, Souza, Cimone Rozendo de, CPF:85911283972, http://lattes.cnpq.br/8227598190372706, Silva, Fernando Moreira da |
| Publisher | Universidade Federal do Rio Grande do Norte, Programa Regional de P?s-Gradua??o em Desenvolvimento e Meio Ambiente PRODEMA, UFRN, BR, Meio Ambiente, Cultura e Desenvolvimento |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Format | application/pdf |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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