Symbols. Defmitions, and Units
31
the parameters controlling the physical processes of dilution and sinking,
all other parameters of the model are in reality nonlinear functions that are
deeply interrelated with the state variables of the model. As it stands, the
model developed in this chapter is still too general to be of much use for
either analytical or numerical treatment; the next two chapters will therefore be devoted to further specification and parametrization of processes
involved in controlling growth and nutrient utilization in phyto- and
zooplankton populations.
2.7 Symbols, Definitions, and Units
Symbol
DefInition
Dimension
Ci
Biomass of phytoplankton population;
(mgC)r'
q
Mortality loss rate from zooplankton populationj .
day"'
D
Dilution rate
day·'
D,
Total loss rate from phytoplankton population;
day" I
F.
Clearance rate of zooplanktonj on phytoplankton;
I (mg ct day· I
g/
Specific growth rate of zooplankton populationj
day"'
L,
Total phosphorus loading
(I-Ig P) r ' day"'
).Ii
Specific growth rate of phytoplankton population;
day"'
q/
Water flow into lake
I day"'
qo
Water flow out oflake
I day"'
~
Phosphorus content of zooplankton populationj
(I-Ig P) (mg cr'
Q/
Phosphorus content of phytoplankton population i
(I-Ig P) (mg Cr'
P,
Dissolved inorganic P concentration
(I-Ig P) r '
PT
Total phosphorus concentration in lake
(I-Ig P) r '
P£
Total phosphorus concentration in inflowing water
(I-Ig P) r '
p.
Phosphorus regeneration rate of zooplanktonj
(1-18 P) (mg Cr' day"'
R£
Unavailable fraction oftotal P loading
R,
Total phosphorus retention
OJ
Sinking loss rate from phytoplankton population i
day"'