Case Studies - Coastal Lagoons: Ecosystem Processes and Modeling for Sustainable Use and Development - page 463

Five cruises were conducted to the area to collect water samples for the analyses
of the monitoring parameters. Almost the entire first sampling was used to implement
the sampling and experimentation methods and to overcome and minimize the
difficulties and troubles encountered during experimentation. The rest of the exper-
imentation values were considered during the discussion of results, which further
led the scientists to achieve overall seasonal evaluations. Sampling periods were
selected in order to make seasonal evaluations and comparisons.
As horizontal and vertical salinity gradients were observed in the system, surface
and bottom water samples were collected at each station. Surface water samples
were collected from an 0.5-m depth. Bottom water sampling depths were chosen
according to the depth of the stations and vertical salinity gradients. Salinity mea-
surements were carried out with the SBE25 Sealogger CTD probe at various depths.
The measured and calculated parameters from the five cruises are listed below.

Measured Parameters
Measured parameters include salinity, temperature, depth, Secchi depth, light, pH,
total suspended solids (TSS), dissolved oxygen (DO), biochemical oxygen demand
(BOD), alkalinity, NO 3 − N, total nitrogen (TN),

dissolved reactive phosphorus (DRP), total reactive phosphorus (TRP), total dis-
solved phosphorus (TDP), total phosphorus (TP), Si, chlorophyll a , and particulate
organic carbon (POC).

− N+NO 2 − − N, NO 2 − − N, NH 4 + −

Calculated Parameters Using Measured Parameters
Calculated parameters using measured parameters include NO 3 −

N, dissolved inor-
ganic nitrogen (DIN), particulate organic nitrogen (PON), dissolved organic nitrogen
(DON), particulate phosphorus (PP), particulate inorganic phosphorus (PIP), and
particulate organic phosphorus (POP).

−

9.5.1.2.3.2 Using Monitoring Results as a Tool
After comprehensive data analyses, reliable data have been used for assessment of

• Hydraulic/hydrodynamic characteristics of the system

• Water quality and eutrophication characteristics of the system as well as

model calibration and verification studies, which are discussed in detail
in the relevant sections

9.5.1.2.4 Indicators/Indexes
Indicators and indexes are still being evaluated. A methodology for indication
of indicators and indexes has been developed, but its assessment is still in
progress.

9.5.1.2.5 Economic Evaluations and Cost-Benefit Analysis
A parallel study is ongoing for cost-benefit analysis. Results of the social impact
assessment studies will provide data for the benefit analysis, whereas the results
obtained from decision support system tools such as models or GIS will be used to
support the cost analysis. The methodology and details of social impact assessment
studies are given in Section 9.5.1.2.7.