At the seasonal scale, the Secchi
reached its deepest depth at the end of
the CD season with maximum value of
3.30 m measured in February 2012.
Conversely, the shallowest depth was
observed in June during a transition
period between the WD and the WW
seasons (Fig. 3b). Such variations correspond
with phytoplankton dynamic;
phytoplankton biomass having a strong
relationship with the Secchi depth
(Spearman r = - 0.45; p < 0.01) (Tab. III).
According toTPconcentrations (Tab. IV),
higher values were measured during
WWseason after mixing period. Simultaneously
the Secchi depth increase.