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Signs and impacts of hydrological drought in the Rakovnicky stream basin
Maroušková, Kateřina ; Matoušková, Milada (advisor) ; Hrdinka, Tomáš (referee)
This thesis deals with the signs and impacts of the hydrological drought in the Rakovnicky stream basin. Its aim is to evaluate trends of the selected hydroclimatic variables, to analyze drought periods and land cover changes as one of the factors influencing a runoff regime in the catchment. The main methods used for the long-term and seasonal trends are Man-Kendall test, IHA analysis, flow duration curves and mass curves. Dry periods are evaluated based on Streamflow drought index (SDI), Low Flow index and runoff Q95 exeedance. Land use changes are analyzed using historical maps and index of change. Basic indices of ecological stability are calculated. According to the results the frequency and intensity of the hydrological drought in the Rakovnicky stream basin is increasing. Although the amount of a rainfall is consistent, its distribution throughout the year is changing. In addition the constantly increasing temperature and land use changes cause a significant runoff decreasing. To improve a water retention capacity in the cathment, it would be convenient to apply adaptation measures in the river channels and floodplains. Key words: rainfall, runoff, drought, ecological status, Rakovnicky stream
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Hydromorphological survey and type specific reference conditions of streams
Tomšová, Zuzana ; Matoušková, Milada (advisor) ; Králová, Magdalena (referee)
The aim of Water framework Directive 2000/60/ES (WFD) is to reach a good ecological status of watercourses which consist of 3 constituents - the biological, physio-chemical and the hydromorphological state. To make these conditions equal among the various countries of the EU, the particular conditions of various watercourses are characterized as deviations from the default "reference status". The reference status corresponds to the natural (or near natural) state without any anthropogenic disturbance (or with only a minor disturbance). These disturbances mean different modification of the watercourses or ways of farming in the proximity of the inundation area. This Bachelor's Thesis studies publications as a basis for defining the hydromorphological - type specific - reference conditions in the WFD (2000/60/ES) context. Issues of classification and typology of watercourses are discussed, as well as the current legislation connected with these issues and the methods of hydromorphological survey in chosen countries. In the last section, possible hydromorphological parameters suitable for the determination of morphologically type-specific conditions are defined in Czech republic. Key words: reference condition, stream typology, ecological status, natural status, near natural status, hydromorphological...
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Ecological evaluation of streams in protected area Křivoklátsko in Directive 2000/60/ES
Kesnerová, Lucie ; Benešová, Libuše (advisor) ; Matoušková, Milada (referee)
This thesis deals with the monitoring of water quality and aquatic sediments analysis in the protected area Křivoklátsko. Monitoring was carried out at 16 locations and there were determined 14 physico-chemical parameters . Sediment samples were collected once for the whole period at 14 locations in which was determine the content of metals. In each sediment sample there was analyzed content of selected metals. The results of analysis, water and sediment samples were evaluated according to the Directives and regulations giving limits for water and sediment. Due to the Czech Republic is a member state of the European Union, the state was also evaluated according to Water Framework Directive. Theoretical part of thesis decribes characteristics of metals, their forms in water and soils. This section also contain some informations about water framework directive 2000/60/EC as a great step in a water policy. Moreover there is a short history about development water quality in the Czech Republic. Experimental section contains standards for determining water quality, but indicating in particular the processing of sediment samples from sampling to determine concentrations. The following chapter deals with the evaluation of the results given by legislation - for water to the CSN 75 7221 and Regulation...
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Optimization of digital river network and its impact on catchment water management
Hošek, Zdeněk ; Matoušková, Milada (advisor) ; Šípek, Václav (referee)
Digital river network dataset is an important source of information in any aspect of water management decision making. It is also a base for modelling or scientific research in many different fields. Development of the dataset in the Czech Republic had been fragmented in a past and as a result three different datasets have been developed that cover the whole of the state's territory. The datasets contain different geometries, different and often conflicting attributes and serve different purposes. Today the time has come that water management decision makers have realised that the situation is no longer sustainable and make effort to merge the datasets into one. The task brings in several technical issues and a potential for severe legal consequences. The aim of this study is to develop a methodological approach to merging the existing datasets into one. This methodological approach to decision which of the conflicting or different attributes should be adopted is based on assumption that the existing datasets will be merged into one consisting the best of all. Comparison of features in the existing dataset will inevitably lead to many conflicts when it will be necessary to decide which of the considered features should be adopted to the resulting dataset. The study considers the main purposes which...
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Impact of urbanization on streams habitat quality
Stádníková, Monika ; Matoušková, Milada (advisor) ; Králová, Magdalena (referee)
Increased impervious cover associated with urbanization alters the natural cycling of water. Changes in the shape and size of urban streams, followed by decreased water quality, are the most visible effects of increased imperviousness. Greater frequency and severity of flooding, channel erosion and destruction of aquatic habitat commonly follow watershed urbanization. Alterations in the aquatic environment associated with these hydrological changes greatly compromise the normal functioning of waterways.
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Assessment of physical river habitat diversity of streams. Application in experimental catchments of upper Blanice River.
Stříbrný, Martin ; Matoušková, Milada (advisor) ; Šípek, Václav (referee)
The subject of bachelor thesis was to evaluate the diversity of physical habitat, using three methods of hydromorphological survey. Methodologies with different approaches of evaluation have been applied to model basin Sviňovický stream. Detailed assessment describes the downstream changes in individual characteristics. River basin represents a contrast between the upper stream, which is completely anthropogenically influenced and lower stream which is after restoration. The thesis presents the result of a field survey of different methodologies and evaluates the diversity of habitat in different flow conditions. The results of all three approaches are confirmation of positive impact of restoration to the habitat quality and especially the requirement to modify each methodology to local conditions. Longitudinal development of selected hydromorphological parameters have been observed.
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