Salinity Intrusion and Seasonal Water Quality Variations in the Tidal ...

olume
Surface flo
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oxes. Vx is always 0 or positive; any calculatio
enerating a negative value contains some underlyin
rror that must be addressed (e.g., bad algebra,
iolation of steady-state assumption, mcorrec
umerical values for salinity or other conservativ
racer, incorrect values for contributors to VQ*).
In two-layer systems assumed to
'estuarine circulation," this is the outflow from th
surface layer to the ocean or adjacent box. It is th
sum of VR and Vd (defined below) in a two-layer,
single-box system. It will have a negative or 0 value.
Vd Deep flow volume In two-layer systems assumed
(length' time") 'estuarine circulation," this is the inflow
Vertical
cean or adjacent box to the box of interest. It is th
ifference between Vd and VR in a two-box, single­
layer system. It will have a positive or 0 value. I
ffect, Vd in a two-layer system is equivalent to Vx i
single layer system.
ntrainment flow volum 'estuarine circulation," this is the flow of water fro
(length' time")
In two-layer systems assumed to hav
he deep to the surface layer. It is equal to Vd in
wo-box, single-layer system. It is negative wit
espect to the deep layer and positive with respect to
he surface layer.
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