标题：Comparison between the index of biotic integrity and a method of multicriteria for analysis of the environmental quality of three streams tributaries to the of Itaipu reservoir
其他标题：Comparison between the index of biotic integrity and a method of multicriteria for analysis of the environmental quality of three streams tributaries to the of Itaipu reservoir
摘要：The human activities have been exercising deep and, usually, negative influence on the water bodies. Some negative effects are due to the pollutant while others are associated to the hydrology changes of the basin, habitat modifications and energy sources alterations. In many situations the decision about the environmental involves selection of alternatives, events or actions. However, those decisions usually, have conflicting point of view and different judgments, forcing the researcher to decide without enough technical base and so, many times inducing wrong decisions. Based on the exposed above, the objective of this research was to present a multicriteria method (ELECTRE TRI) to evaluate the environmental quality of streams and to compare with the Index of Biotic Integrity (IBI); both methods were applied in tributaries of the Itaipu Reservoir (Ajuricaba, Arroio Fundo and Curvado rivers), using fish communities as indicator. According the results was verified that the choice of the multicriteria method for this type of study is valid, because when compared with the Index of Biotic Integrity the results were not so different. Besides, the ELECTRE TRI being a method that evaluates the criteria groups to classify the streams represents better the reality when compared with the Index of Biotic Integrity because it is a non-compensatory method.↓As atividades humanas têm exercido profunda e, normalmente, negativa influência sobre oscorpos hídricos, sendo que alguns efeitos negativos são devidos aos poluentes, enquantooutros estão associados às mudanças na hidrologia da bacia, modificações no habitat ealterações das fontes de energia. Muitas situações na tomada de decisão, sobre umambiente, envolvem a seleção de alternativas, eventos ou cursos de ações. No entanto,essas decisões geralmente possuem pontos de vista conflitantes, com diferentes juízos devalores, forçando os tomadores de decisão a decidirem sem uma base técnica suficiente,induzindo muitas vezes a decisões equivocadas. Em vista do exposto acima, o objetivodesta pesquisa foi apresentar um método de multicritério (ELECTRE TRI), para avaliar aqualidade ambiental de riachos e compará-lo ao Índice de Integridade Biótica, sendo queambos foram aplicados em afluentes ao Reservatório de Itaipu (rios Ajuricaba, Arroio Fundoe Curvado), utilizando-se a comunidade de peixes como indicador. De acordo com osresultados constatou-se que a escolha do método multicritério para este tipo de trabalho éválida, pois quando comparados com o Índice de Integridade Biótica, os resultados não sedistanciaram. Deste modo, o ELECTRE TRI, além de ser um método que avalia o conjuntode critérios para classificar os riachos, representa melhor a realidade quando comparadocom o Índice de Integridade Biótica, tendo em vista que é um método não-compensatório.
其他摘要：The human activities have been exercising deep and, usually, negative influence on the water bodies. Some negative effects are due to the pollutant while others are associated to the hydrology changes of the basin, habitat modifications and energy sources alterations. In many situations the decision about the environmental involves selection of alternatives, events or actions. However, those decisions usually, have conflicting point of view and different judgments, forcing the researcher to decide without enough technical base and so, many times inducing wrong decisions. Based on the exposed above, the objective of this research was to present a multicriteria method (ELECTRE TRI) to evaluate the environmental quality of streams and to compare with the Index of Biotic Integrity (IBI); both methods were applied in tributaries of the Itaipu Reservoir (Ajuricaba, Arroio Fundo and Curvado rivers), using fish communities as indicator. According the results was verified that the choice of the multicriteria method for this type of study is valid, because when compared with the Index of Biotic Integrity the results were not so different. Besides, the ELECTRE TRI being a method that evaluates the criteria groups to classify the streams represents better the reality when compared with the Index of Biotic Integrity because it is a non-compensatory method.
关键词：Engenharia; Apoio a Decisão; Meio Ambiente;ELECTRE TRI; Índice de integridade biótica; Qualidade ambiental;ELECTRE TRI; Index of Biotic Integrity; environmental quality
其他关键词：ELECTRE TRI; Index of Biotic Integrity; environmental quality
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