Geoscience Reference
In-Depth Information
TABLE 4.4
Temperature Correction Factors for Decomposition
of Organic Nitrogen to NH
4
+
(
θ)
Average
Location
Reference
As Cited in
Explanation
1.03
Texas bays and
estuaries
Brandes, 1976
Bowie
et al.
93
(1.02-1.04), PON to NH
4
+
1.045
O'Connor, 1981
O'Connor
94
1.051
Manasquan
Estuary
Najarian et al.,
1984
Najarian
et al.
95
Detritus to NH
4
+
1.08
Patuxent River
Estuary
Lung, 1992
Lung
80
1.08
Maryland coastal
waters
Lung and Hwang,
1994
Lung and
Hwang
81
DON to NH
4
+
, value used
in modeling
TABLE 4.5
Settling Velocity of Organic Nitrogen (m day
−
1
)
Min.
Max.
Avg.
Location
Reference
As Cited in
0.23
James River
O'Connor, 1981
O'Connor
94
0.4
Patuxent River
O'Connor, 1981
O'Connor
94
0.15
Patuxent River Estuary
Lung, 1992
Lung
80
0.6
Sacramento San Joaquin Delta
O'Connor, 1981
O'Connor
94
4.1.5.1.3
Ammonium Nitrogen
∂
∂
C
t
C
KC
CGaPC
(
T
−
20)
1
=
Da
(1
−
f C
)
Death
−
k
θ
4
−
1
44444
2
44444
3
12
443
44
P
1
nc
on
4
71
71
7
P
1
nc
NH
34
+
m
Pc
4
12
443
44
Nitrification
Mineralization
(4.23)
C
KC
C
(
T
−
20
)
−
k
θ
6
12
12
1
+
NIT
6
12
44
44
4444
3
Growth
where
C
1
=
ammonium nitrogen concentration [mg N l
−1
]
D
P
1
=
death plus respiration rate constant of phytoplankton [day
−1
]
a
nc
=
nitrogen to carbon ratio [mg N/mg
−1
C]
1
−
f
on
=
fraction of dead and respired phytoplankton recycled to the ammonium
nitrogen pool [none]
C
4
=
phytoplankton carbon concentration [mg C l
−1
]
k
71
=
organic nitrogen mineralization rate constant at 20
°
C [day
−1
]
θ
71
=
organic nitrogen mineralization temperature coefficient [none]
Search WWH ::
Custom Search