Development of Nutrient and Pesticide Concentrations in the Sázavka River and Their Changes in Connection with the Rainfall-runoff Regime

This bachelor thesis aims to study the selected parameters and nutrients of water quality in relation to the rainfall-runoff regime in the Sázavka River basin. The rainfall-runoff regime is influenced by many factors, including the climate change, which has received more and more attention in recent years. These changes may have a consequential impact on the quality of surface waters. In the first part of this paper selected parameters of water quality are presented. The aim was to try to understand their behaviour under the changing water flow dynamics. For this purpose, Czech and foreign literature was used. In this thesis there are also presented the most common statistical methods that are used in analysing geochemical parameters. The second part of this paper deals with the changes of climate- hydrological characteristics (air temperature, precipitation, snow cover and flow), the analysis of nutrients (forms of nitrogen and phosphorus) and physical parameters (water temperature and electrolytic conductivity). Lastly, metabolites of herbicides that ware above the detection limit in the watershed (acetochlor ESA, alachlor ESA, dimethachlor ESA and metolachlor ESA) were assessed. The analysis used some of the methods introduced in the research section. The regression analysis, correlation..