<abstract xmlns="http://www.w3.org/1999/xhtml"><p>Depending on climate conditions, bathymetry, basin morphology, management practices and other factors, some reservoirs are more or less prone to stratification, which can strongly affect both chemical and biological status of water. In the Goczalkowice Reservoir (the biggest dam reservoir in the south of Poland), water quality parameters, such as chlorophyll a concentration, change very dynamically. In the presented study, the Estuary, Lake and Coastal Ocean Model (ELCOM) was applied to simulate water thermodynamics in a period of summer and autumn when the highest concentrations of chlorophyll a were observed, based on the continuous water monitoring in the ZiZOZap project (<xref ref-type="bibr" rid="j_oszn-2018-0005_ref_024_w2aab2b8c26b1b7b1ab2b1c24Aa">Łaszczyca et al., 2011</xref>). The purpose of the application of ELCOM was to simulate the thermal stratification in the reservoir and to prepare a basis for analyses of the relationship between water thermodynamics and quality. Simulations allowed the identification of several short water mixing events in summer and the final mixing event at the end of summer. The study also included the first application of model results to analyse the relation of changes in water temperature with observed concentration of chlorophyll a (ChlA). Analysis confirmed that each water mixing event was followed by a significant increase in ChlA concentration.</p></abstract>

Depending on climate conditions, bathymetry, basin morphology, management practices and other factors, some reservoirs are more or less prone to stratification, which can strongly affect both chemical and biological status of water. In the Goczalkowice Reservoir (the biggest dam reservoir in the south of Poland), water quality parameters, such as chlorophyll a concentration, change very dynamically. In the presented study, the Estuary, Lake and Coastal Ocean Model (ELCOM) was applied to simulate water thermodynamics in a period of summer and autumn when the highest concentrations of chlorophyll a were observed, based on the continuous water monitoring in the ZiZOZap project (Łaszczyca et al., 2011). The purpose of the application of ELCOM was to simulate the thermal stratification in the reservoir and to prepare a basis for analyses of the relationship between water thermodynamics and quality. Simulations allowed the identification of several short water mixing events in summer and the final mixing event at the end of summer. The study also included the first application of model results to analyse the relation of changes in water temperature with observed concentration of chlorophyll a (ChlA). Analysis confirmed that each water mixing event was followed by a significant increase in ChlA concentration.

Mathematical modelling as a tool for the assessment of impact of thermodynamics on the algal growth in dam reservoirs – case study of the Goczalkowice Reservoir

Environmental Protection and Natural Resources

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Depending on climate conditions, bathymetry, basin morphology, management practices and other factors, some reservoirs are more or less prone to...

Parameter	Value
Mean albedo of the water for shortwave radiation	0.08
Mean albedo of the water for long wave radiation	0.03
Drag coefficient on bottom cells	0.005
Initial wind speed for domain	0 m/s
Initial water temperature for domain	11.4°C
Light extinction coefficients for shortwave radiation bands used to calculate the shortwave penetration:
Photosynthetically Active Radiation (PAR)	0.2-0.4 m^–1
Near Infrared (NIR)	1 m^–1
Ultra Violet A (UVA)	1-1.8 m^–1
Ultra Violet B (UVB)	2.5-2.8 m^–1
Sediments reflectivity	0.9
Surface heat transfer coefficient	0.0013-0.0015

Mathematical modelling as a tool for the assessment of impact of thermodynamics on the algal growth in dam reservoirs – case study of the Goczalkowice Reservoir

Published Online: May 25, 2018

Page range: 21 - 29

DOI: https://doi.org/10.2478/oszn-2018-0005

Keywords
ELCOM, model, dam reservoir, temperature, thermodynamics, phytoplankton, stratification

© 2018 Rafał Ulańczyk, Czesław Kliś, Damian Absalon, Marek Ruman, published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Figure 1

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Figure 6

Figure 7

Parameters used in ELCOM model.

Mathematical modelling as a tool for the assessment of impact of thermodynamics on the algal growth in dam reservoirs – case study of the Goczalkowice Reservoir

Published Online: May 25, 2018

Page range: 21 - 29

DOI: https://doi.org/10.2478/oszn-2018-0005

KeywordsELCOM, model, dam reservoir, temperature, thermodynamics, phytoplankton, stratification

© 2018 Rafał Ulańczyk, Czesław Kliś, Damian Absalon, Marek Ruman, published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Parameters used in ELCOM model.

Keywords
ELCOM, model, dam reservoir, temperature, thermodynamics, phytoplankton, stratification