Fig. 3: The seasonal statistical distribution of water quality parameters.

Panels: Seasonal violin plots for TLI, Chla, TN/TP ratio, CODMn, and DO. Black curve: Fitted normal distribution. Annotation (below each panel): Shapiro-Wilk test results (statistic and p-value) for data pooled across all seasons, indicating significant deviation from normality (p < 0.01).