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Hydrological study of potential restoration of a defunct small water reservoir in the Ploučnice River basin within the elimination of hydrological drought impacts
Kočíb, Jiří ; Kocum, Jan (advisor) ; Janský, Bohumír (referee)
This diploma thesis is focused on the study of the potential restoration of small water reservoirs within the framework of eliminating the effects of hydrological drought. In the theoretical part of the thesis, it summarizes the current knowledge about small water reservoirs and ongoing climate changes. It also focuses on the possibilities of their revitalization as part of the contribution of this renewal to the landscape. At the same time, the work also provides insight into the detailed physical-geographic characteristics and focuses primarily on the hydrological and climatological view of the issue of revitalization. These introductory findings are transferred to the practical part of the work in which the author deals with a case study that should lead to concrete steps to successfully complete the work plan. A comparison of the methods of measuring the contents and shorelines of individual reservoirs is also published in the results passage. The results of the work recommend the restoration of all reservoirs at selected locations and indicate possible further steps to deal with this result. Key words: climate change, water retention, small water reservoir, hydrological drought, Ploučnice river.
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Defunct small water reservoirs in the Ploučnice River basin
Purm, Marek ; Kocum, Jan (advisor) ; Doležal, Tomáš (referee)
The purpose of this bachelor thesis is to provide an understanding of the soil water retention, particularly focusing on small water reservoirs and their water retention potential within the region. Additionally, this paper uses available historical maps to investigates a historical development of water reservoirs in the river Ploucnice basin. The research first provides systematic review of a secondary research, based on Czech and foreign resources, focusing on the topics and issues mentioned above. This chapter includes investigation of physio-geographic properties of the river Ploucnice basin, particularly focusing on hydrological analysis of this area, using research data from Czech Hydrometeorological Institute. The primary research focused on a historical development of water reservoirs in the area of selected basin. Key words: soil water retention, small water reservoir, digital elevation model, climate change, Ploučnice river, Robečský brook
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Contamination of floodplain of the Ploucnice by heavy metals: relation to its architecture
Hošek, Michal ; Goliáš, Viktor (advisor) ; Kříbek, Bohdan (referee)
Summary: This thesis is focused on mapping of contaminants released into the environment probably due to uranium mining. These chemical contaminants are used to reconstruct the sedimentary processes. The aim of the thesis was both the geochemical assessment of the situation in the catchment area of the Ploucnice River in Boreček using the flood sediments from the research points as sedimentary archives pollution for last decades. With depth profiles, gamma wire log, XRF and enrichment factors (LEF), we have tried to perform chemostratigraphic correlation of the sediments. As target elements U, Ba, Zn and Ni were chosen, whose concentrations are related to the grain size of the sediment. Furthermore, the theory of secondary pollution is developed.
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Contamination of foodplain of the Ploučnice river by heavy metals: relation to its architecture
Hošek, Michal ; Goliáš, Viktor (advisor) ; Kříbek, Bohdan (referee)
Summary: This thesis is focused on mapping of contaminants released into the environment probably due to uranium mining. These chemical contaminants are used to reconstruct the sedimentary processes. In the thesis we evaluate geochemical situation in the catchment area in the locality Borecek (part of the municipality Ralsko) using the overbank sediments as sedimentary archives of pollution during the last decades by elements U, Ba, Zn, Ni and 226 Ra. A map of aerial survey of gamma activity was used to select the area of interest, for more accurate localisation we used a surface gamma spectrometry. On Borecek we retrieved ten depth profiles of alluvial sediments (up to 230 cm) and one in Mimon, all samples were subjected to X-ray fluorescence spectral analysis (XRF), across the floodplain we performed gamma wire logs. For interpretations of floodplains architecture electrical resistivity tomography (ERT) was used and selected profiles were analysed for the activity of 226 Ra and 210 Pb. Interrelation of 226 Ra and Ba proved that radiobarite is the main source of the gamma activity. 210 Pb / 226 Ra ratio was used as sediment age indicator. With enrichment factor (LEF), we performed chemostratigraphic correlation of the sediments, for that the concentration of the target elements is corrected for varying...
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