Criação e aplicação de protocolo de avaliação de impacto ambiental no córrego Riacho Fundo - DF

Abstract

The present study shows a visual evaluation of environmental impact due to the intensity of use and occupation of the edges of the stream Riacho Fundo. As a consequence of anthropic impacts, the main problems are reflected in the quality of the water of this stream in study. Based on the changes of the Hannaford et al protocols (1997) and EPA (Environmental Protections Agency) (USA) (1987) made by Callisto (2002), some parameters of the protocol were adapted and it was complemented by new ones related to the evaluated region. The new protocol had as an acronym PRAVIA (Protocolo Rápido de Avaliação Visual de Impacto Ambiental). To know the behavior of the created protocol, physical – chemical and biological analyses were done, in the studied points in the stream Riacho Fundo for a comparison with the final result of the diligent protocol. The results of the PRAVIA’s represented well the kind of environment, where the samples are collected, serving as an instrument to take notes of the main visual impacts in the waters of the reservoir of Lago Paranoá. Concerning the laboratorial analyses, a meaningful relevance was obtained in relation to the classification (natural, altered and impacted) of every taken point. It can be concluded that the method is of easy comprehension, but efficient, to the evaluation of environmental impact and it’s recommended to search for bibliographical references of water resources in study for an adaptation of PRAVIA’s parameters.