National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
Changes in physico-chemical parameters of the Orlik reservoir selected tributaries
ZELENKOVÁ, Kamila
The topic of the thesis is determination of concentration of dissolved solids in water and seasonal changes in surface water chemistry for specific affluents of Orlík water reservoir. Water samples were collected on regular basis and analysed in a laboratory during one season (November 2014 - November 2015). The thesis is focused on monitoring of changes in phosphate and nitrate concentrations, in particular. The results of analysis indicate that measured concentrations of substances at monitored locations reflect generally measured data within the region. Concentrations of NO3-N peak in winter to early spring seasons, therefore seasonal changes do occur; differences between locations have not been proven statistically. As for the parameter PO4-P within locations downstream pond systems no significant statistic differences were identified. Values of PO4-P concentration are not primarily associated with agricultural activities but rather with local sources existing within the catch basin. It has been concluded from testing water quality upstream and downstream fish ponds that pond management had no impact on quality of water within the monitored locations in 2015; respectively no additional phosphor and nitrogen load was imposed on Orlík water reservoir
Pedogenesis of the Territory of Prague Affected by Human Activity
Žigová, Anna ; Šťastný, Martin
Soil cover affected by human activity in Prague is found generally in areas with loess deposits. Sites with different types of anthropogenic load, about 6 km apart, were selected for the study of pedogenesis. Soil profile of the first characteristic sequence was buried beneath a landfill layer 2,5 m thick. In the second sequence, the top part of the soil profile was affected by human activity. Characteristics of pedogenesis were determined using grain-size distribution, pH values, contents of CaCO3, Cox, Nt, cation exchange capacity and clay mineral contents. The character of pedogenetic processes was affected by anthropogenic factor to a variable degree. Lower influence on pedogenesis was encountered in the sequence with soil profile buried beneath a landfill layer.

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