"Concentrações dos metais pesados no sedimento da foz do Rio Imboaçu em constatação aos fatores críticos de degradação de bacias hidrográficas urbanas definidos por dados secundários"

Abstract

A presente pesquisa analisa a relação das concentrações de metais em sedimentos de ambientes estuarinos com os fatores de degradação de bacias hidrográficas urbanas, tendo como estudo de caso o rio Imboaçu, em São Gonçalo, região metropolitana do Rio de Janeiro. O problema dessa bacia hidrográfica foi estudado considerando duas abordagens fundamentais: a análise laboratorial dos sedimentos presentes na foz do rio e o estudo dos fatores de degradação de bacias hidrográficas urbanas definidos por dados secundários. Os resultados de metais no sedimento indicam que a principal fonte de contribuição desses poluentes para o ambiente é através do esgoto sem tratamento, corroborando com os principais fatores apontados pela análise dos dados secundários.

A New Approach to the Ordered Classification of Critical Factors in the Degradation Processes of River Basins

“…All critical factors were conceptually treated, observing the terms, similar expressions and peculiarities from each of the authors that exposed them. Such procedure had the objective of avoiding that terms with differences only in the semantic field were considered distinct factors, as per described by Branco [4]. Being so, it was observed, judiciously, that each factor with the intention of avoiding repetitions, being therefore, reduced to 18 [4].…”

“…Such procedure had the objective of avoiding that terms with differences only in the semantic field were considered distinct factors, as per described by Branco [4]. Being so, it was observed, judiciously, that each factor with the intention of avoiding repetitions, being therefore, reduced to 18 [4]. Table 1 below presents the degradation factors based on the following references [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19].…”

“…Deterioration factors raised from bibliographical reviews are used to feed the basis of knowledge, generating important information in order to define critical factors of environmental deterioration and so, understand the dynamics of the changes in such environment. The definition of these critical factors of environmental quality can be faced with data raised from field search and evaluate the quality of this information, since this primary data correspond to the reality of the studied environment [4].…”