NUTRIENT FLUXES 
Figures 23-4 and 23-5 illustrate data for several water quality variables at 
three diverse locations in Kaneohe Bay. “OF” is within about 100 meters of 
the major sewer outfall; “S” is in the southeast sector of Kaneohe Bay; and 
C is in the central sector. Samples have also been taken from the northwest 
sector, where values are similar to those of the central sector. 
In order for net exchange of material to occur between two water masses, a 
concentration gradient of that material is required. An estimate of the net mass 
flux between two well-mixed source waters may be obtained as the exchange 
volume times the concentration difference between those water masses. The 
concentration differences illustrated by Figure 23-4 qualitatively demonstrate 
OF 
S 
dissolved 
organic N 
o.o 5.0 io.o 
ALL UNITS ARE mmole/m^ 
Figure 23-4. Concentration of Selected Water Quality Variables 
Near the Kaneohe Outfall (OF), Near the Middle of the 
Southeast Sector (S), and Near the Middle of the Central 
Sector (C). 
NOTE: The bars represent the mean values ± one standard error unit. 
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