| Autor: |
BAČOVÁ MITKOVÁ, Veronika, HALMOVÁ, Dana, DANÁČOVÁ, Zuzana, BARTÍK, Ivan |
| Předmět: |
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| Zdroj: |
Acta Hydrologica Slovaca; 2024, Vol. 25 Issue 1, p45-56, 12p |
| Abstrakt: |
Climate change and anthropogenic activity have an impact on the components of the hydrological regime of rivers, potentially leading to negative effects on the quantity and quality of water. Environmental targets are set to ensure the achievement of good surface water and groundwater status in the EU and to prevent water deterioration. The achievement of environmental goals is verified through established assessment systems, which also assess the quality of surface waters. Physico-chemical indicators, including water temperature and oxygen regime, are relevant to the ecological state of a river. First the study presents the statistical analysis of water temperature and indicators of water oxygen regime measured at four sampling points on the Váh: Komárno, nad Sereďou, Hlohovec and nad Liptovským Hrádkom. Second, the monthly concentration of dissolved oxygen of the Váh River at four sampling sites was modeled using water temperature. Autoregressive SARIMA models were created to modeling dissolved oxygen concentration based on monthly corresponding water temperature. The SARIMA model with various mathematical expressions of the regressor was tested to be the best fit model with a high correlation coefficient. Results showed that for all selected models with selected regressors the p-value values of estimated parameters were α < 0.05, and the differences in their estimated parameters as well as the simulations were not statistically significant. The study concludes that the SARIMA model can effectively simulate changes in dissolved oxygen based on changes in water temperature. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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