The Oder Estuary - IOW

118
mmol/m2*d
mmol/m2*d
16
12
3.3.4 Denitrification
8
4
Denitrification values from the model are higher than most values given in literature (Table 3.3).
As mentioned above, due to lack of extensive measurements denitrification flux was difficult to
calibrate in the model.
Table 3.3 Denitrification in the model and values given in literature including measurements for
the Szczecin Lagoon and surrounding.
Denitrification rate
[mmol N m -2 day -1 ]
daily averagees
1.13 - 9.23
annual mean 4.0
range 0.4 +/- 2.7
or
range 2.0 +/- 4
annual mean about 0.4
0 - 24
50% less then 2.16
0
Jan 95 Jun 95 Dec 95 Jun 96 Dec 96 Jun 97 Dec 97
-4
3.0
2.5
2.0
1.5
1.0
0.5
Denitrification rate
authors units
---
[g N m -2 a -1 ]
range 2.1 +/- 13.8
or
range 2.0 +/- 4
annual mean about 2
0-534
[µmol N2 m -2 h -1 ]
50% less than 45
0 – 9.36 0-195
[µmol N2 m -2 h -1 ]
DIN in situ measurements
DIN laboratory measurements
TDN in situ measurements
TDN laboratory measurements
DIN model Grosses Haff
DIN model Kleines Haff
DIP in situ measurements
DIP laboratory measurements
TDP in situ measurements
TDP laboratory measurements
PO4 model Grosses Haff
PO4 model Kleines Haff
0.0
Jan 95
-0.5
Jun 95 Dec 95 Jun 96 Dec 96 Jun 97 Dec 97
Fig. 3.4 Daily values (mmol/m 3 /d) of nitrogen and phosphorus fluxes from sediment in the
Grosses Haff and Kleienes Haff, model results plotter against measurements data from
WILLE (1998).
Comments References
Grosses and Kleines Haff
Model results - mean 1980-99
Kleines Haff
(1994-95)
(based on two methods of
recalculating
into annual values)
The highest values measured
in water bodies with high
anthropogenic pressure
Model results
DAHLKE et al. 1998
SEITZINGER 1988
(review publication)
Mesocosm experiments NOWICKI 1994