02314naa a2200193 a 450000100080000000500110000800800410001910000230006024501230008326000090020652016750021565300170189065300120190765300130191970000160193270000180194870000160196677301380198211291782019-11-28       2019    bl uuuu     u00u1 u    #d1 aGARBOSSA, L. H. P.  aSedimentation velocity of seaweed branches as input to estuarine hydrodynamic dispersion model.h[electronic resource]  c2019  aExperimental cultivation of the seaweed Kappaphycus alvarezii has been made in Sambaqui Beach located in the Bay of Santa Catarina Island (BoSCI), Southern Brazil since 2008. K. alvarezii is an introduced species so the environmental monitoring in the surrounding production area is mandatory. This work is the first step towards the understanding of the dispersion behaviour and the range of detached branches in the estuarine region. For that, the use of hydrodynamic modelling as tool to support the evaluation of the water dynamics and particles fate was considered. Several environmental datasets are needed as input for hydrodynamic mathematical models, like bathymetry, tide time series and wind, which are available for BoSCI. However, this modelling is impracticable without information of the branches settling velocity. A bench scale trial was conducted to determine the branches settling velocity based on four algae branches samples. These branches were characterized considering size, volume, weight and density. The density of the branches was relatively stable, with a value of 1.2891 + 0.1721 g.cm-3 while the seawater (30?) was close to 1.021 g.cm-3. The average vertical velocities resulted in 3.88 cm.s-1, 5.92 cm.s-1, 4.22 cm.s-1 and 3.22 cm.s-1, respectively. Statistical analysis indicated that the vertical velocities are significantly different for each branch. These results show that the sedimentation velocities are not related to the density or weight of the branches. Although the first two analyzed branches have similar weight, they presented significant difference in sedimentation velocities, probably due to the shapes of the branches.  ahydrodynamic  aSeaweed  avelocity1 aLAPA, K. R.1 aSANTOS, A. A.1 aHAYASHI, L.  tIn: LATIN AMERICAN PHYSICS OF ESTUARIES AND COASTAL OCEANS CONFERENCE, 2019, Florian??polis. Resumos... Florian??polis: LAPECO, 2019.