Biogeochemical Cycles - Coastal Lagoons: Ecosystem Processes and Modeling for Sustainable Use and Development - page 134

TABLE 4.27
Half-Saturation Concentrations of Dissolved Oxygen for Organic
Matter Degradation (mg O 2 l − 1 )

Average Location Reference As Cited in

0.1 Venice Lagoon Melaku Canu et al., 2001 Melaku Canu et al. 88

0.5 Chesapeake Bay Cerco and Cole, 1994 Cerco and Cole 91

TABLE 4.28
POC to DOC Rate Constant (day − 1 )

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

0.075 Chesapeake

Bay

Cerco and Cole, 1994 Cerco and

Cole 91

Labile POC
to DOC

0.005 Chesapeake

Bay

Cerco and Cole, 1994 Cerco and

Cole 91

Refractory
POC to
DOC

0.15 1.5 San Juan Bay

Estuary

Bunch et al., 2000 Bunch

et al. 92

Labile POC
to DOC

0.005 San Juan Bay

Estuary

Bunch et al., 2000 Bunch

et al. 92

Refractory
POC to
DOC

Due to their effects on the dissolved oxygen and nutrient cycles, related literature
values about algal kinetics and stoichiometric parameters are also provided in
Tables 4.29 - 4.36.

4.1.5.4.2 Dissolved Oxygen (Benthic)
The benthic layer oxygen balance equations are given as

∂ C

t

E

6 j ( T − 20 )

=− k θ C +

DIF
2

( C − C ) (4.35)

12 443 44

DS DS 5 6 i 6 j

∂ D

j

12 44 44 3

Oxidation

Diffusion

where for the benthic segment j and the water segment i
C 6

= dissolved oxygen concentration [mg O 2 l −1 ]

k DS = organic carbon as (CBOD) decomposition rate constant at 20 ° C [day −1 ]

θ DS = CBOD decomposition temperature coefficient [none]

T = water temperature [ ° C]

E DIF = diffusive exchange coefficient [m 2 day −1 ]

D J = benthic layer depth [m]