A structurally dynamic modelling - Lake Mogan, Turkey as a case study

Zhang, JJ
Jorgensen, SE
Tan, CO
Beklioğlu, Meryem
A structurally dynamic model based on phosphorus nutrient limitation has been developed for Lake Mogan located nearby Ankara, Turkey. This eutrophication model, which includes very dense submerged plants, was calibrated using a standard procedure described by Jorgensen and Bendoriccho [Fundamentals of Ecological Modelling, 3rd ed. Elsevier, Amsterdam, 20 pp.]. Furthermore, exergy was applied as a goal function to consider the dynamic adaptation and the seasonality of plankton species (e.g. size shifts). This study provides the second case example by applying the exergy as a goal function in the calibration phase. The model was also validated using the data of another year. The results were consistent with the validations of the several lake models [Hydrobiologia 356 (1997a) 87; Hydrobiologia 379 (1998) 147; Hydrobiologia 445 (2001b) 1]. The model gives a fairly good performance in describing the competition between phytoplankton and submerged plants.


Catastrophic-like shifts in shallow Turkish lakes: a modeling approach
Tan, CO; Beklioğlu, Meryem (Elsevier BV, 2005-05-10)
A generalized logistic model (GLM) was developed to determine occurrence of submerged macrophytes in shallow Lake Eymir. and the model was tested independently on the upstream shallow Lake Mogan using the data collected fortnightly from both lakes during 1997-2002. The independent variables included concentrations of chlorophyll-a (chl-a), suspended solids (SS) and total phosphorus (TP), Secchi disc transparency and z-scores of water levels. The dependent variable was the binary index of submerged plant occ...
A computer program for the analysis of 1-D contaminant migration through a soil layer
Çokça, Erdal (Elsevier BV, 2003-01-01)
The physical and chemical processes that influence contaminant transport through a saturated soil layer are presented. The computer program (1DContr) was developed based on existing analytical solutions for one-dimensional transport of contaminants in a saturated soil layer. The computer program is given for pulse and continuous source. The formulation includes advective and dispersive transport as well as sorption and first order transformation. The computer program that is based on analytical solutions is...
An application of geographic information system (GIS) to a fictitous thermal power plant in Mersin, Turkey: An application of dispersion modelling coupled with GIS
Oguz, M (Springer Science and Business Media LLC, 2003-09-01)
In this study, local air quality impacts of a proposed conventional coal-fired power plant in the Ice1 region has been investigated using numerical dispersion modeling studies coupled with a GIS application. Within the impact area of the facility, Industrial Source Complex Short Term (ISCST2) dispersion model has been used to estimate ground-level concentrations of air pollutants originating from the power plant. For the same impact area, GIS applications have been utilised to determine the agricultural yie...
Hysteresis in vegetation shift - Lake Mogan prognoses
Zhang, JJ; Jorgensen, SE; Beklioğlu, Meryem; Ince, O (Elsevier BV, 2003-06-15)
A structurally dynamic model developed [Ecol. Model. (in press)] for Lake Mogan was applied to set up prognosis for the response of the lake to the increased phosphorus input. It was found that a shift to a turbid water state takes place at phosphorus concentration between 0.16 and 0.25 mg TP l(-1) resulting in a significant decrease in the submerged plants. Consequently, above the threshold P level, the submerged plants abruptly disappeared, while phytoplankton became dominant. The model simulated the reco...
A baroclinic three dimensional numerical model applied to coastal Lagoons
Balas, L; Ozhan, E (2003-01-01)
An implicit barochnic unsteady three-dimensional model (HIDROTAM3) which consists of hydrodynamic, transport and turbulence model components, has been implemented to two real coastal water bodies namely, Oludeniz Lagoon located at the Mediterranean coast and Bodrum Bay located at the Aegean Sea coast of Turkey. M2 tide is the dominant tidal constituent for the coastal areas. The flow patterns in the coastal areas are mainly driven by the wind force. Model predictions are highly encouraging and provide favor...
Citation Formats
J. Zhang, S. Jorgensen, C. Tan, and M. Beklioğlu, “A structurally dynamic modelling - Lake Mogan, Turkey as a case study,” ECOLOGICAL MODELLING, pp. 103–120, 2003, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/36737.