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Hydrological extremes and the change in water quality of the upper Úpa river
Kavalír, Václav ; Matoušková, Milada (advisor) ; Havlíková, Petra (referee)
The presented master's thesis addresses the alteration of the rainfall-runoff regime in the upper reaches of the Úpa River and the behavior of water quality parameters during selected hydrological events. The literature review section of this thesis elaborates on fundamental knowledge about factors influencing water quality in watercourses, sources of pollution, the impact of hydrological extremes on water quality conditions, along with the behavior of individual parameters in these situations. Basic statistical methods, time series analysis, Mann- Kendall test, correlation coefficients and field survey were used for the evaluation. The results suggest there is a warming trend in the area, associated with, for example, a shift in spring melt, peak flows and a general reduction in the duration of snow cover. The overall water quality status of the river has improved significantly following several factors such as the construction of new WWTPs, reduced acidification, etc. Hydrological extremes have an impact on selected water quality assessment parameters such as basic ions, some metals, electrical conductivity, amount of organic matter in the stream (except for the parameter BOD5), etc. On the other hand, no effect was found for phosphorus, sulphate or nitrate. In the case of organic matter, aluminium or...
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