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Previous issue date: 2006-05-19 / Hydrographic basins always exercised a big fascination over humankind that attracted for its scenery beauty or for its richness in natural resources, had been acting in order to modify these important ecosystems without, therefore, considering the possible consequences of these changes. The attributed importance to the coast ecosystems, in eminence to the hydrographic basin of Puna? river and adjacent areas, is had when it s verified the diversity of the ecosystems that contemplate it. Hydrographic basin in evidence in Rio Grande do Norte state, occupies an area of nearly 652.71 km?, being it sited in the homogeneous micro-region Litoral Nordeste, with a regional population estimated in nearly 75,188 inhabitants, according to the Anu?rio Estat?stico do Rio Grande do Norte 2004. The region of the researched basin is formed by seven municipal districts related as it follows: Maxaranguape, Pedra Grande, Pureza, Rio do Fogo, S?o Miguel de Touros, Taipu and Touros, but Maxaranguape, Rio do Fogo, Touros and Pureza have a direct participation in the basin. Basin in study have it lands evaluated according to the agriculturist aptitude by the conventionally methodology practiced in the country, having as objective, then, a compara-tive analysis between the ambient unities, Aeolian littoral and coast tray, identified in the researched area. From the characterization of the physic way of the area in study and owning the kept data, it was proceeded the integrated analysis of the structural elements of the landscape which were evidenced that the fragile areas are associated with the areas of agriculture cultivation, such as the ones of irregular occupation. About the degradation, the ambient diagnostic of the basin indicated that the equivalent to the Aeolian Littoral Ambient Unit correspond to the bigger pledging of the ambient quality, in other words, high ambient fragility, being this result due to the use and occupation of the soil, propitiating this way, vulnerability in the vegetal cover of the area, despite it disposes of a low agriculture cultivation percentage. Already in the Coast Ambient Tray, is emphasized the medium ambient fragility, despite of the high index of cultivated area. In a general way, the total area of the hydrographic basin of Puna? river and adjacent areas presented ambient impacts over the tolerance limit, indicating the necessity of a review of the practices of use and handling of the soil, reforesting of the water courses edges, control of erosion and contamination of the aqueous in the perspective to reduce the effects of the impacts due to the use and occupation of the basin in regard. The present search evaluated the ambient impacts diagnosised in the hydrographic basin of Puna? river and adjacent areas, pointing the causes and the probable consequences of the damages caused by these impacts to the basin ambient. From the analysis of these data, if was possible to become explicit how they are fundamental as key elements in the process of decision taking in the ambient questions / As bacias hidrogr?ficas sempre exerceram grande fasc?nio sobre o homem, que atra?do por sua beleza c?nica ou por sua riqueza em recursos naturais, vem atuando de forma a modificar esses importantes ecossistemas, sem, no entanto, levar em considera??o as poss?veis conseq??ncias dessas altera??es. A import?ncia atribu?da aos ecossistemas costeiros, em destaque a bacia hidrogr?fica do rio Puna? e ?rea litor?nea adjacente, ? constatada quando se verifica a diversidade de ecossistemas que a contempla. A bacia hidrogr?fica em evid?ncia, no Estado do Rio Grande do Norte, ocupa uma ?rea de aproximadamente 652,71 km?, estando esta situada na micro-regi?o homog?nea Litoral Nordeste, com uma popula??o regional estimada em aproximadamente 75.188 habitantes, segundo o Anu?rio Estat?stico do Rio Grande do Norte 2004. A regi?o da bacia pesquisada ? formada por sete munic?pios a seguir relacionados: Maxaranguape, Pedra Grande, Pureza, Rio do Fogo, S?o Miguel de Touros, Taipu e Touros, sendo que Maxaranguape, Rio do Fogo, Touros e Pureza, tem participa??o direta na bacia. A bacia em estudo teve suas terras avaliadas quanto ? aptid?o agr?cola pela metodologia convencionalmente praticada no pa?s, objetivando, assim, uma an?lise comparativa entre as unidades ambientais, litor?nea e?lica e tabuleiro costeiro, identificadas na ?rea pesquisada. A partir da caracteriza??o do meio f?sico da ?rea em estudo e de posse dos dados armazenados, procedeu-se a an?lise integrada dos elementos estruturais da paisagem os quais evidenciaram que as ?reas fragilizadas est?o associadas ? ?reas de cultivo agr?cola, bem como as de ocupa??o irregulares. Em se tratando de degrada??o, o diagn?stico ambiental da bacia indicou que a ?rea equivalente a Unidade Ambiental Litor?nea E?lica, corresponde ao maior comprometimento da qualidade ambiental, ou seja, alta fragilidade ambiental, sendo este resultado decorrente do uso e ocupa??o do solo, propiciando dessa forma, vulnerabilidade na cobertura vegetal da ?rea, apesar desta dispor de baixo percentual de cultivo agr?cola. J? na Unidade Ambiental Tabuleiro Costeiro, diagnosticou-se m?dia fragilidade ambiental, em raz?o do elevado ?ndice de ?rea cultivada. De modo geral, a bacia hidrogr?fica do rio Puna? e ?rea litor?nea adjacente, apresentou no final da pesquisa, impactos ambientais acima do esperado, indicando a necessidade da revis?o das pr?ticas de uso e manejo do solo, reflorestamento das margens dos cursos d ?gua, controle da eros?o e contamina??o dos aq??feros, na perspectiva de reduzir os efeitos dos impactos decorrentes do uso e ocupa??o do solo. A presente pesquisa analisou os impactos ambientais diagnosticados na bacia hidrogr?fica do rio Puna? e ?rea litor?nea adjacente, apontando as causas e as prov?veis conseq??ncias dos danos causados por estes impactos ao meio ambiente da bacia. A partir da an?lise dos dados, foi poss?vel explicitar o quanto estes s?o fundamentais como elementos chave no processo de tomada de decis?o nas quest?es ambientais
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/18968 |
| Date | 19 May 2006 |
| Creators | Tavares, Jos? Arib?rio |
| Contributors | CPF:06301827449, http://lattes.cnpq.br/8446822254263130, Soares, F?tima Maria, CPF:07478810497, http://lattes.cnpq.br/7869326143908541, Lima, Zuleide Maria Carvalho, CPF:44366825449, http://lattes.cnpq.br/1283103005046733, Nunes, Elias |
| Publisher | Universidade Federal do Rio Grande do Norte, Programa de P?s-Gradua??o em Geografia, UFRN, BR, Din?mica e Reestrutura??o do Territ?rio |
| 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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