Figure 1

Figure 2
![Meteorological conditions and water temperature in Goczałkowice Reservoir in analysed period [based on archival data of the ZiZOZap project].](https://sciendo-parsed.s3.eu-central-1.amazonaws.com/647269d0215d2f6c89dc7232/j_oszn-2018-0005_fig_002.jpg?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=AKIA6AP2G7AKOUXAVR44%2F20251206%2Feu-central-1%2Fs3%2Faws4_request&X-Amz-Date=20251206T144841Z&X-Amz-Expires=3600&X-Amz-Signature=23a823ae3aa65e297d4c2606f5eab38db84acbb911d4092ba608dc5d0b5cb63b&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject)
Figure 3

Figure 4
![Model calibration results (grey: range of modelled temperatures ELCOM, black: observed temperatures) [observations based on archival data of the ZiZOZap project]](https://sciendo-parsed.s3.eu-central-1.amazonaws.com/647269d0215d2f6c89dc7232/j_oszn-2018-0005_fig_004.jpg?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=AKIA6AP2G7AKOUXAVR44%2F20251206%2Feu-central-1%2Fs3%2Faws4_request&X-Amz-Date=20251206T144841Z&X-Amz-Expires=3600&X-Amz-Signature=f5a1120fbf9ddbdf5a483e62af80967c1b1ffc0ae3c70d30443d3fec67fae3c3&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject)
Figure 5
![Comparison of modelled (ELCOM) and observed temperatures in the water column before and after calibration [observations based on archival data of the ZiZOZap project]](https://sciendo-parsed.s3.eu-central-1.amazonaws.com/647269d0215d2f6c89dc7232/j_oszn-2018-0005_fig_005.jpg?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=AKIA6AP2G7AKOUXAVR44%2F20251206%2Feu-central-1%2Fs3%2Faws4_request&X-Amz-Date=20251206T144841Z&X-Amz-Expires=3600&X-Amz-Signature=b7d2df8e31d5a6c88d296910a6292fe6c0e2006a8790e406cdae6df22e14b119&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject)
Figure 6

Figure 7
![Comparison of temperature difference in water profile ΔT (ELCOM model) and observed concentration of ChlA [observations based on archival data of the ZiZOZap project]](https://sciendo-parsed.s3.eu-central-1.amazonaws.com/647269d0215d2f6c89dc7232/j_oszn-2018-0005_fig_007.jpg?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=AKIA6AP2G7AKOUXAVR44%2F20251206%2Feu-central-1%2Fs3%2Faws4_request&X-Amz-Date=20251206T144841Z&X-Amz-Expires=3600&X-Amz-Signature=b1aafdee49843ef3f43bd3b0c0c6ab5b4a1c24843391022bdda631f499e7486e&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject)
Parameters used in ELCOM model_
| 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: | |
| 0.2-0.4 m–1 |
| 1 m–1 |
| 1-1.8 m–1 |
| 2.5-2.8 m–1 |
| Sediments reflectivity | 0.9 |
| Surface heat transfer coefficient | 0.0013-0.0015 |