当前位置： SCI文献检索 > JOURNAL OF ENVIRONMENTAL RADIOACTIVITY期刊下所有文献 > Use of multitracers for the study of water mixing in the Paraíba do Sul River estuary.

Use of multitracers for the study of water mixing in the Paraíba do Sul River estuary.

Abstract：

:Multitracers were used to study water mixing in the Paraíba do Sul River estuary region in August 2007 (dry season) and March 2008 (rainy season) and to evaluate the reach of the river plume in the direction of the open ocean. Two sampling campaigns were carried out, each in a different season. Based on these results, it was possible to conclude that the multitracers used in this study (salinity, Si, Ba and U, as well as the radium isotopes 223Ra, 224Ra, 226Ra and 228Ra) presented satisfactory results toward defining the plume reach and determining the residence time and water-mixing processes in the estuary. A strong correlation was observed between tracers and the distance to the coast. During the low river water discharge period, the riverine water took about 10 days to reach open ocean waters (salinity approximately 35). During the rainy period this value decreased to 6 days. Based on the radium results, it was possible to calculate diffusion coefficients (K(h)) of 23 km(2) d(-1) and 38 km(2) d(-1) for 224Ra and 223Ra, respectively, during the dry season (winter). Values of 65 km(2) d(-1) and 68 km(2) d(-1) for 223Ra and 224Ra, respectively, were found for the rainy period (summer).

journal_name

J Environ Radioact

journal_title

Journal of environmental radioactivity

authors

Souza TA,Godoy JM,Godoy ML,Moreira I,Carvalho ZL,Salomão MS,Rezende CE

doi

10.1016/j.jenvrad.2009.11.001

subject

Has Abstract

pub_date

2010-07-01 00:00:00

pages

564-70

issue

7

eissn

0265-931X

issn

1879-1700

pii

S0265-931X(09)00244-6

journal_volume

101

pub_type

杂志文章

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