Biogeochemical Cycles - Coastal Lagoons: Ecosystem Processes and Modeling for Sustainable Use and Development - page 127

TABLE 4.20
Organic Phosphorus to PO 4 3 −

Temperature Correction Factor ( θ )

Avg. Location Reference As Cited in Explanation

1.04 Texas bays and

estuaries

Brandes, 1976 Bowie et al. 93 POP to PO 4 3− , model

documentation values

1.08 Potomac River Estuary Thomann and

Fitzpatrick, 1982

Bowie et al. 93 DOP to PO 4 3−

1.045 O'Connor, 1981 O'Connor 94

1.08 Patuxent River Estuary Lung, 1992 Lung 80

1.08 Maryland coastal

waters

Lung and
Hwang, 1994

Lung and
Hwang 81

DOP to PO 4 3− , value
used in modeling

TABLE 4.21
Settling Velocity of Organic Phosphorus (m day − 1 )

Avg. Location Reference As Cited in Explanation

0.23 James River O'Connor, 1981 O'Connor 94

0.4 Patuxent River Estuary O'Connor, 1981 O'Connor 94

0.30 Patuxent River Estuary Lung, 1992 Lung 80 Settling rate of POP

0.6 Sacramento San Joaquin Delta O'Connor, 1981 O'Connor 94

TABLE 4.22
Rate Constants for Decomposition of Organic Phosphorus to
PO 4 3 − in Sediments (day − 1 )

Min. Max. Avg. Location Reference As Cited in Explanation

0.00025 0.00038 Sacca di

Scardovari, Italy

Viel
et al., 1991

Viel et al. 97 Anoxic

conditions in
the sediment

0.02 Patuxent River

Estuary

Lung, 1992 Lung 80 Given as Org P

decomposition
rate, value used
in modeling

k OPD = organic phosphorus decomposition rate constant at 20 ° C [day −1 ]

θ OPD = organic phosphorus decomposition temperature coefficient [none]

f D 8 = fraction dissolved organic phosphorus [none]

The rate constants for decomposition of organic phosphorus to PO 4 3− in sediment
are given in Table 4.22.