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DRAFT: Water Quality Analysis Simulation Program (WASP)
C3i=
fD3i=
CDIP,i=
CPIP,i=
9.2.5.
Version 6.0
the total inorganic phosphorus in segment i, mg/L
the fraction of the total inorganic phosphorus assigned to the
dissolved phase in segment i
the equilibrium dissolved inorganic phosphorus in segment i,
available for algal uptake, mg/L
the equilibrium sorbed inorganic phosphorus in segment i, which
may then settle to the sediment layer from the water column, mg/L.
Settling
Particulate organic and inorganic phosphorus settle according to user-specified velocities and
particulate fractions. Particulate organic phosphorus is equated to solid type 1, which represents
organic matter. Time and segment-variable organic matter settling velocities, vs3 , can be input
by the user using transport field 3. Segment-variable organic phosphorus dissolved fractions,
fD8j, are input with initial conditions.
Particulate inorganic phosphorus is equated to solid type 3, which represents inorganic sediment.
Time and segment variable inorganic phosphorus settling velocities, vs5 , can be input by the user
using transport field 5. Segment-variable inorganic phosphorus dissolved fractions, fD3, are input
with initial conditions.
9.3.
The Nitrogen Cycle
Four nitrogen variables are modeled: phytoplankton nitrogen, organic nitrogen, ammonia, and
nitrate. A summary is illustrated in Figure 9-5. Table 9-5 summarizes the terms used in the
nitrogen system kinetics.
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