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National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
Screeningová analýza toxických kovů v říčních sedimentech Moravského krasu
 Němcová, Martina
The diploma thesis dedicates the presence of toxic metals in the river sediments of the Moravian Karst. Thesis assesses potential sources of toxic metals and deals with the issues of legislative measures relating to the presence of toxic metals in sediments. In the practical part diploma thesis determines the amount of toxic metals in 20 selected localities together with other geochemical parameters. pH, redox potential and conductivity were monitored in water. The amount of total organic carbon (TOC) and amount of toxic metals is determined in the river sediment. The concentration of toxic metals in sediments was determined by non-destructive X-ray fluorescence analysis (XRF method) on the device Niton XL3t GOLDD +. Finally, the measured results of toxic metals are evaluated and compared with valid legislative regulations.
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Changes of organic carbon in surface waters in headwater areas
 Špringerová, Pavla ; Matoušková, Milada (advisor) ; Benešová, Libuše (referee)
Diploma thesis is focused on changes of organic carbon (OC) in surface waters in headwater areas. Thesis is in its theoretical part focused on the literature study of currently published research results of the issue. The important part is finding the possible causes of OC variability, especially landcover and soil environment. The practical part is devoted to research in experimental basins of KFGG, namely in the upper Vydra, Blanice and Rolava. The aim of this work is to clarify the relationships between organic matter concentrations and discharge rates regarding to hydrological extremes. Furthermore, the influence of river basin size and various landcover and variability of concentrations and relationship with other indicators of biogeochemism is studied. The relationship between OC and discharge rate is positive and in most river basins strong or very strong. The weakest relationship was monitored on the profiles with the highest proportion of peatlands in the river basin. In these catchments, the highest average concentrations of OC were determined in autumn, in catchments with the lower proportion of peatlands it is in summer. Analysis of rainfall-runoff events confirmed the positive relationship of OC and discharge. The lag time of the maximum OC concentration beyond the maximum discharge...
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