Modeling Concepts - Coastal Lagoons: Ecosystem Processes and Modeling for Sustainable Use and Development - page 300

Because the data requirement is crucial for model validation, available data must
be representative of the natural conditions. For example, when winds from a coastal
meteorological station are used to impose wind stress at the surface of a lagoon, do
they really represent winds over the lagoon? Does the surrounding landscape relief
influence it? In that case, what are the transfer functions for winds over the lagoon?
Ideally, a set of experiments may be required to verify the validity of the available
data for a specific task.
When existing data are not adequate or data are nonexistent for validation
purposes, analytical solutions for simple geometry, but with realistic boundary con-
ditions, may be used instead. 49 It should be noted, however, that even if tests with
a simple geometry are successful, the model might still generate some errors or
inconsistencies for the real conditions.
Finally, it is advisable to collect data for calibration and validation after a
preliminary run of the numerical is made using approximate initial and boundary
conditions obtained from the literature. This will point to those areas where hydro-
dynamic conditions are significantly different. Monitoring stations can then be
positioned in those regions. Further recommendations can be found in the monitoring
program design ( see Chapter 7 ).

ACKNOWLEDGMENTS

The authors deeply appreciate Dr. Irina Chubarenko's contribution to the planning
and initial drafting of some of the sections. We are also thankful to colleagues from
our respective institutions for sharing their ideas and personal results that led to the
material presented in this chapter. Finally, we thank Ali Ertürk of Istanbul Technical
University for his contribution during the editing stages of Chapter 6.

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