Zone 1 Zone 2 
Ocean Dominated River Dominated 
Figure 9.2 Light attenuation coefficients (kj) versus distance from the mouth of the estuary from 
cruise data (years 1998 to 2006), with filled and open symbols representing dry and wet 
seasons, respectively. Solid line - dry season regression ( kd= 0.34 + [0.069 * Distance], r 2 = 
0.33, p<0.001). Dashed line - wet season regression (kd= 0.36 + [0.057 * Distance], r 2 = 0.30, 
p<0.001). While dry and wet season light attenuation are significantly correlated with distance, 
their regression coefficients are not different. Combining both seasonal data sets yields (kj= 
0.34 + [0.066 * Distance], r 2 = 0.32, pO.001). 
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