Key factors in vertical mixing processes in a reservoir bordering the Pantanal floodplain, Brazil

The aim of this study was to understand seasonal variations in the vertical structure of the water column, and to quantify the importance of the physical forces (solar radiation, wind and hydraulic retention time) that control mixing processes in a reservoir bordering the Pantanal floodplain. Sample...

Full description

Saved in:
Bibliographic Details
Published in:Hydrological sciences journal 2015-09, Vol.60 (9), p.1508-1519
Main Authors: Fantin-Cruz, Ibraim, Pedrollo, Olavo, Bonecker, Cláudia C, Zeilhofer, Peter
Format: Article
Language:English
Subjects:
chemical composition
floodplains
forces
hydraulic retention time
hydropower
hydroélectricité
mixing
qualité de l'eau
réservoir tropical
sampling
seasonal variation
solar radiation
stratification
temps de rétention hydraulique
tropical reservoir
vent
water quality
wind
winter
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The aim of this study was to understand seasonal variations in the vertical structure of the water column, and to quantify the importance of the physical forces (solar radiation, wind and hydraulic retention time) that control mixing processes in a reservoir bordering the Pantanal floodplain. Samples were taken every three months in the reservoir centre, at four depths, for the measurement of nine physical and chemical water quality parameters. The reservoir presented a long stratification period with complete mixing in winter. The vertical structure showed that, during the stratification period, the upper layers of the reservoir are homogeneous and the physical and chemical composition only changes at greater depths. The wind acting over an extended period is the only factor that significantly influences the vertical structure in the reservoir, giving rise to mixing processes. Moreover, the position of the draw-off point in the upper layer of the reservoir, together with the reservoir depth, enhances vertical stability.
ISSN:2150-3435
0262-6667
2150-3435
DOI:10.1080/02626667.2014.933224