Avaliação da regeneração natural e da recuperação ambiental em áreas de depósitos de expurgos no âmbito do Projeto de Integração do São Francisco com as Bacias do Nordeste Setentrional – PISF (Evaluation of natural regeneration and environmental...)

O Projeto de Integracao da Bacia do Sao Francisco com as Bacias do Nordeste Setentrional – PISF e dotado de diversos tipos de obras e intervencoes, tais como aquedutos, estacoes elevatorias, barragens, canais, formando – em seu conjunto – uma obra com alto grau de complexidade, produzindo diversos impactos ambientais e degradando muitas areas. Dentre os 38 programas ambientais no âmbito do Projeto Basico Ambiental – PBA do PISF, ha o PBA 09 “Programa de Recuperacao de Areas Degradadas” que tem por objetivo evitar o agravamento de processos erosivos e o comprometimento dos canais de agua, assim como possibilitar a retomada do uso original ou alternativo das areas onde houver intervencao. A proposta do presente estudo surgiu no sentido de complementar as acoes adotados no âmbito do PBA 09. Nesse, avaliou-se a regeneracao/ recuperacao em areas de depositos de expurgos a partir de ferramentas de sensoriamento remoto, Sistemas de Informacoes Geograficas – SIG e dados de campo. Para tanto, o principal instrumento utilizado para avaliar a regeneracao/ recuperacao foi o Indice de Vegetacao por Diferenca Normalizada. A partir da obtencao do indice de vegetacao e estabelecimento de classes de cobertura do solo atraves do Software Envi 5.1@, realizou-se a integracao e analise com o uso do software ArcGis 10.1@. Os dados de campo utilizados para avaliar a regeneracao/ recuperacao ambiental foram as areas onde receberam depositos de expurgos. De acordo com os metodos adotados neste trabalho pode-se perceber que as acoes de regeneracao/ recuperacao em areas de depositos de expurgos adotadas foram pouco expressivas. A B S T R A C T The Project for the Integration of the Sao Francisco Basin with the Northern Northeast Basins - PISF is endowed with many types of constructions and interventions, such as aqueducts, elevation stations, dams, canals, forming – together – a work with a high degree of complexity, producing several environmental impacts and degrading many areas. Among the 38 programs in the scope of the Basic Environmental Project - BEP of the PISF, there is the BEP 09 ";Program for the Recovery of Degraded Areas";, whose objective is to avoid the worsening of erosion processes and the impairment of water channels, as well as to enable a resumption of usage of original or alternate areas of intervention. The proposal of the present study emerged in the sense to complement the actions adopted in the scope of PBA 09. In this study the regeneration / recovery in areas of waste disposal sites was evaluated using remote sensing tools, Geographic Information Systems - GIS and in field data. For this, the main instrument used to evaluate the regeneration / recovery was the Normalized Difference Vegetation Index. From the collect of the vegetation index and the establishment of coverage classes of the soil through Envi 5.1 ® software, and integrations and analysis with the ArcGis 10.1 ® program. The field data used to evaluate the environmental regeneration / recovery were the areas that received deposits of purges. According to the methods adopted in this study it can be seen that the regeneration / recovery actions in areas of purge deposits were not very significant. Keywords: Natural Regeneration; Recovery of Degraded Areas; Vegetation Index; Remote Sensing; Geographic Information System. Normal 0 21 false false false PT-BR JA X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Tabela normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin-top:0cm; mso-para-margin-right:0cm; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0cm; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri",sans-serif; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-fareast-language:EN-US;}