@Article{AraújoSaAlCuOgSt:2017:ImAq,
author = "Ara{\'u}jo, Carlos A. S. and Sampaio, Fernanda G. and
Alc{\^a}ntara, Enner and Curtarelli, Marcelo P. and Ogashawara,
Igor and Stech, Jos{\'e} Luiz",
affiliation = "{Universit{\'e} du Qu{\'e}bec {\`a} Rimouski} and Embrapa and
{Universidade de S{\~a}o Paulo (USP)} and {Reference Center
Foundation for Innovative Technologies} and {Indiana
University\−Purdue University at Indianapolis} and
{Instituto Nacional de Pesquisas Espaciais (INPE)}",
title = "Effects of atmospheric cold fronts on stratification and water
quality of a tropical reservoir: implications for aquaculture",
journal = "Aquaculture Environment Interactions",
year = "2017",
volume = "9",
pages = "403",
month = "Sept.",
keywords = "Tropical reservoir \⋅,,, Cold fronts \⋅,,, Water
quality parameters \⋅,,, Aquaculture \⋅,,, Nile
tilapia.",
abstract = "Stratification and mixing patterns of a water body are influenced
by the variability of atmospheric systems, which can also modify
their biogeochemical properties. The primary goal of this study
was to analyze the effect of atmospheric cold fronts (CFs) on
thermal stratification and water quality parameters in 4
embayments of the Furnas Hydroelectric Reservoir (FHR)
(southeastern Brazil), a warm monomictic water body. A secondary
goal was to evaluate the implications of this effect on the
aquaculture of Nile tilapia Oreochromis niloticus (L.) in net
cages. A 2 yr dataset of meteorological and water quality
parameters was used to compute heat flux balance components and
buoyancy frequency. These parameters were used to evaluate the
influence of CFs on FHR water column stability and water quality.
It was observed that the passing of CFs increased net heat loss
and wind velocity, resulting in a partial mixture of surface
waters with deeper layers. These changes in the physical structure
of the water column altered the diel cycle of water temperature,
led to a slight decrease in dissolved oxygen concentrations and pH
values during the stratification period, and contributed to the
increase in dilution power at the fish cultivation sites. However,
following CF passages, no significant changes were observed in
water quality parameters that influenced Nile tilapia cultivation
in the FHR. Nevertheless, the understanding of meteorological
systems and their influence on the physical and biogeochemical
properties of an aquatic system is important for optimal
management of aquaculture activities.",
doi = "10.3354/aei00240",
url = "http://dx.doi.org/10.3354/aei00240",
issn = "1869-215X",
language = "en",
targetfile = "araujo_effects.pdf",
urlaccessdate = "15 jun. 2024"
}