| Issue |
E3S Web Conf.
Volume 286, 2021
10th International Conference on Thermal Equipments, Renewable Energy and Rural Development (TE-RE-RD 2021)
|
|
|---|---|---|
| Article Number | 04003 | |
| Number of page(s) | 7 | |
| Section | Miscellaneous | |
| DOI | https://doi.org/10.1051/e3sconf/202128604003 | |
| Published online | 12 July 2021 | |
Models to estimate river temperature. Example for Danube, at Oltenița in the context of climate change and anthropic impact
1 University Politehnica of Bucharest, Faculty of Power Engineering, Dept. of Hydraulics, Hydraulic machines and Environmental engineering
2 University Politehnica of Bucharest, Faculty of Power Engineering, Dept. of Energy Production and use
* Corresponding author: daniela.nistoran@upb.ro
Daily variation of Danube River temperature measured at Oltenitț gauging station over 9 years (2008-2016) was analysed in comparison with the air temperature measured by satellite in the same location between 1979-2020. Air temperature shows a nearly 2°C increase over the 40-years period, which can be attributed to both climate warming and anthropic impact. Water temperature was modeled with a sinusoidal function and variation with discharge was discussed. Long-term trend of hourly surface air temperature variation was obtained from Open Weather data. Air - water temperature dependency was fitted with a logistic function with good approximation. Resulting correlations help predict water temperature as a function of satellite - measured air temperature.
© The Authors, published by EDP Sciences, 2021
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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