The first group is formed by the parameters of salinity, clay, Pb
in the sediment, Zn in water during the rainy and dry seasons and
Cd in sediment; the second group is formed by the remaining evaluated
parameters.
The first affinity group is subdivided into two subgroups: the
first subgroup is formed by clay, Pb in sediment, and Zn in water during the dry season, which demonstrates that these parameters
exhibit greater similarity. The second subgroup is formed by salinity;
Zn in water during the rainy season, Ni in water during the
rainy and dry seasons and Cd in the sediment.