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Changes of physical-chemical parameters of surface water in context with hydrological extremes. Application in the Rolava River catchment.
Šajnarová, Lucie ; Matoušková, Milada (advisor) ; Havlíková, Petra (referee)
6 Abstract The diploma thesis deals with changes in the physico-chemical parameters of surface flows in response to extremes, especially increased flows due to higher precipitation totals or melting snow. The basin of the upper Rolava with peat bogs in the basin and minimal anthropogenic influence was used. The main goal of the work was the analysis of the behavior of electrical conductivity during events when there was an increase in flow rates and the categorization of individual events according to this behavior. Furthermore, the influence of the pre-condition of the watershed on the events and the subsequent behavior of the electrical conductivity was also investigated. The 10-minute electrical conductivity and flow data from the automatic stations of the ecohydrology team of the Faculty of Science, UK, or ČHMÚ were used. Among the methods are data homogenization, construction of hysteresis loops, categorization of loops, calculation of indices for hysteresis loops and PCA analysis for the pre-condition of the watershed. In most cases, a reverse relationship of electrical conductivity behavior was observed during these events, the most common types of electrical conductivity behavior during flow increases include a slow decrease in conductivity with minimum values after the peak of flow (in light...
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Impacts of hydrological extremes on surface water quality in headwater areas. Application in the model study area of the upper Rolava catchment.
Šajnarová, Lucie ; Matoušková, Milada (advisor) ; Havlíková, Petra (referee)
Precipitation-runoff extremes in the source areas have a significant effect on changes in the geochemism of surface waters, which also affect peatlands in the basin. The main goals of this theses include research literature on the topic of changes in the geochemism of surface waters in spring areas with peat bogs in the basin in response to precipitation-runoff extremes. Furthermore, an analysis of runoff and precipitation conditions in the hydrological years 2018, 2019 and 2020 and an analysis of changes in water quality parameters depending on precipitation-runoff extremes for the period from 2013 to 2020 were performed. The relationship between conductivity and flow was monitored using hysteresis loops. The work used data from the experimental profile of KFGG PřF UK on the Slatinný potok and data on flows for the profile Chaloupky in the Rolava from ČHMÚ. The results show that the relationship between conductivity and flow can be analyzed using hysteresis loops, especially in the period with a rapid increase in flow and their shape changes depending on the reconditioning of the basin. Flow dependence was also observed for other parameters, such as iron. Keywords: hydrological drought, flood, surface water quality, peat bog, electrical conductivity, hysteresis loop
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