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DRAFT: Water Quality Analysis Simulation Program (WASP)
Version 6.0
Figure 9-4 Phosphorus cycle equations
Table 9-4 Phosphorus reaction terms
Description
Phytoplankton biomass as carbon
Specific phytoplankton growth rate
Phytoplankton loss rate
Phosphorus to carbon ratio
Dissolved organic phosphorus mineralization at 20°C
Temperature coefficient
Half saturation constant for phytoplankton limitation of
phosphorus recycle
Fraction of dead and respired phytoplankton recycled to
the organic phosphorus pool
. . . recycled to the
phosphate phosphorus pool
Fraction dissolved inorganic phosphorus in the water
column
Fraction dissolved organic phosphorus
Organic matter settling velocity
Inorganic sediment settling velocity
9-17
Notation
Pc
Gp1j
Dp1j
aPC
k83
È83
KmPc
Value
(eq 5.2)
(eq 5.14)
0.025
0.22
1.08
1.0
Units
mg C/L
day-1
day-1
mg P/mg C
day-1
none
mg C/L
fop
0.5
none
(1-fop )
0.5
none
fD3
0.85,
0.70
-
none
fD8
vs3
vs5
none
m/day
m/day