Avaliação ecotoxicológica do sedimento a montante e a jusante da barragem do Ribeirão João Leite – Goiânia/GO
Carregando...
Data
2013-06-28
Título da Revista
ISSN da Revista
Título de Volume
Editor
Universidade Federal de Goiás
Resumo
The aquatic environmental quality monitoring is the way to detect changes in their essential
features to life. The Ribeirão João Leite, located in the State of Goiás, it highlights the need
for constant monitoring, seen its socio-economic importance, the accelerated and disordered
growth that plagues the region, land use focused mostly to agriculture and livestock and
especially its use to the water bus intended for public supply. Searches for the water column
are often conducted developed to the site. However reviews focused on the quality of
sediment in this environment are nonexistent, despite the importance of such compartment.
The sediment has been shown as an important indicator of the health of aquatic ecosystems,
since most contaminants of a basin river system are washed down into the aquatic systems
and can be deposited in this compartment. In this way, based on the importance of sediment to
the water quality, the main objective of this work was to evaluate the quality of the sediment
of the River João Leite, upstream and downstream of a dam public supply, through
ecotoxicological of sediments compared to the physical-chemical parameters in two seasons
(dry and rainy season). The work presented here addresses important aspects when assessing
sediment quality, through four articles divided into chapters. The first chapter is the
characterization of the space-exploratory study area considering its features and the
relationship between the type of soil, polluting sources and composition of the sediment. The
second chapter corresponds to a physical-chemical characterization of the sampled site as well
as the lifting of a possible contaminant (metals), and its potential for bioavailability. The third
and fourth chapters are focused on ecotoxicological assessment, where the organisms-test
Ceriodaphnia dubia were used in the third chapter and Branchiura sowerbyi in the fourth
chapter. The results of this study point to the need to deploy evaluations focused on the
sediments of the River João Leite as everyday monitoring, since the site has problems of
degradation, with high degree of anthropization, together with the lack of soil management
and conservation. To the metals contaminants, the environment revealed toxicity unlikely to
uncertain. And toxicity tests with the test organisms, Ceriodaphnia dubia and Branchiura
sowerbyi, revealed in some cases acute effect, but mostly chronic effect and possible effect
hormetc, which are evidence of an environment that is suffering disruptions, whether from
metals or is by the performance of other contaminants as non-ionic organic compounds, such
as pesticides, widely used in the region. Thus, this category of work being pioneered in the
region is evident the need for further research aimed at this type of compartment (sediment)
and especially that such studies become part of regular monitoring aimed to ensure water
quality of the River João Leite.
Descrição
Palavras-chave
Citação
RIOS, Kelly Cristine Rodrigues Constantino - avaliação ecotoxicológica do sedimento a montante e a jusante da barragem do Ribeirão João Leite – Goiânia/GO. 2013. 150 f. Dissertação (Mestrado em Engenharia do Meio Ambiente) - Universidade Federal de Goiás, Goiânia, 2013.