The Oder Estuary - IOW

the Kleines Haff are higher, indicating that the model results are less accurate then in the case of
Grosses Haff. The Kleines Haff is more difficult to represent properly by a box model, since the
water circulation and exchange with the Grosses Haff is more complex, as compared to the Grosses
Haff which is strongly influenced by the Oder river flow and has shorter water exchange time.
Besides, the Kleines Haff box of the model receives nutrient inputs form the Grosses Haff box and
potential inaccuracy of the modeling in the Grosses Haff box is introduced to the Kleines Haff box.
3.3 Comparison of model results with available data
3.3.1 Model results versus nutrient and chlorophyll measurements in the water
column
Model represents well seasonal changes of nutrient concentrations in both parts of the Lagoon with
phosphate minimum in spring and two maximum peaks: one in summer (July-August) another in
winter months and with one DIN and minimum in summer (July-August) and winter maximum.
Also phytoplankton growth as compared to the chlorophyll measurements is well represented in the
model. Figures 3.1-3.3 present modeling results of dissolved nutrient and chlorophyll
concentrations versus measurements from all monitoring stations described by BANGEL (this
volume) from WIOS and LUNG monitoring program, separately for the western and eastern part of
the Lagoon.
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