Influência da bacia hidrográfica nas análises limnológicas e espectrais das águas do reservatório salto do Rio Verdinho - GO
Nenhuma Miniatura disponível
Data
2018-05-25
Autores
Título da Revista
ISSN da Revista
Título de Volume
Editor
Universidade Federal de Goiás
Resumo
The development of mankind has always been connected to water resources. Currently, they
have been more intensely exploited, especially in electrical power generation, through the
opening of countless hydropower plants in Brazil from which many are found in the biome
called Cerrado, due to its great water resources. From the need of studies on artificial
reservoir once its made, the study on Salto do Rio Verdinho ́s river basin and waterpower
plant ́s reservoir, located in the lower part of Verde river ́s river basin, close to Paranaíba
river ́s downstream, tributary of Paraná river, was chosen. Verde river ́s flow is the verge of
Caçu and Itarumã counties, in the south of Goiás state. Therefore, the main goal of this work
is to comprehend the dynamics of usage and occupation of the river basin ́s lands and Salto
do Rio Verdinho ́s waterpower plant relating to its water quality. With that in mind, the
landscape was rated according to its physical features and the relation among its geology,
soils, slope, geomorphology and remaining natural vegetation, based on the observation of
the structural principle of the landscape, revealing that the environment of the river basin
region belongs to Mesozoic era ́s geological formations, such as flattened relief and
predominance of slope with very soft dissection between interfluves. Data on the changes in
usage and occupation of the lands was possible through satellites images, where it was found
that between 2005 and 2015, the main usage was pasture with 546 km2, the second, was
areas intended to temporary cultures, with 237,4 km2. The analyses regarding the quality of
the water from the reservoir, were made according to the resolution no 357 from 2005 of
CONAMA, it was ranked as of very low quality due to its high percentage of nitrite and
phosphorus. It was ranked as class 4. The variables: TDS and CE, Temp and TDS, Temp and
CE, present significant correlations. The components optically active in the water (chlorophyll,
concentration of suspended sediment, transparency and murkiness) that interfere in the
electromagnetic spectra, present correlations with the measures of reflectance in the
wavelength of 716 nm and 720 nm in January 2015, while the variables correlated better with
the wavelength of 647 nm, 697 nm e 704 nm in February 2016, pointing that these
wavelengths belong to the color red. The reflectance during the rainy months, January 2015
and February 2016, registered values between 0,04 and 0,23%, while in the dry season, July
2015 and August 2016, 0,03 and 0,14%. Generally speaking, that the research led to
comprehend the current dynamics of the river basin environment and of the hydropower plant
Salto do Rio Verdinho ́s reservoir, on their natural and man induced components that affect
the water quality, thus, fulfilling the intended general aim.
Descrição
Palavras-chave
Citação
ROCHA, I. R. Influência da bacia hidrográfica nas análises limnológicas e espectrais das águas do reservatório salto do Rio Verdinho - GO. 2018. 177 f. Tese (Doutorado em Geografia) - Universidade Federal de Goiás, Goiânia, 2018.