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Separation of runoff based on data from Jenínský stream catchment area using various methods
KUBEŠ, Ondřej
The aim of this paper is to describe and compare various methods of runoff separation. Therefore it is necessary to explain basic hydrological terms that are important for understanding the water regime of landscape. Long-term monitoring of the water regime of the whole catchment area can provide successful detection of hydrological extremes such as droughts or devastating floods. The paper is divided in two parts. The theoretical part includes the literature rerview explaining basic hydrological terms and individual components of water cycle in nature, summary of methods usually used for runoff separation, and the description of the applied methods. The practical part specifies the locality of Jenínský stream, located in the Český Krumlov district. This part further reflects separation of runoff based on the daily runoffs. Methods GROUND, MPGM and Chapman digital filter have been chosen to compare primary runoff and direct runoff. We have also considered the method of separation of minimal monthly runoff according to Kille for seven-year period in relation to the methods mentioned above. Finally, we have chosen several discharge waves for the method of recession curve analysis. The paper compares direct and primary runoff separated by individual methods in the catchment area of our interest.
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Direct run-off - formation and separation methods
NEUBAUEROVÁ, Andrea
The bachelor´s thesis occupies with an issue of a direct flow. The main purpose is the explanation of the basic terms of the issue and the explanation of the sorting of particular parts of a direct flow, that involves a surface saturated flow and a hypodermic flow. Subsequently the thesis describes its participation in the hydrogeological cycle, which means the participation in the permanent circulation of a surface and underground water on Earth. The extreme precipitations are dangerous due to their force, total sum and intensity. The inception of hydrological occurrences like floods or dry seasons is possible owing to this. The fallen precipitations have a big influence on a surface flow and a transportation of soil particles. The thesis is focused on the inception and the genesis of a direct flow. Further it focuses on the factors that influence the flow. Among these factors belong climatic and anthrophogenic conditions, vegetation, type of soil and atmospheric precipitations. There are clarified selected methods of potential separation which are explained and described in detail. This part of the issue mentions CN curve method, GROUNG method, MPGM, analysis of dropped subdivisions and finally method of digital filter (Chapman). These methods divides the flow on an elemental flow and direct flow.
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Methods of runoff components separation
KUBEŠ, Ondřej
The paper deals with monitoring and measurement of runoff. This is particularly important to identify water supplies in the catchment area, or timely detection of extreme hydrological events such as floods and droughts, and because of the potential rate of spread of pollutants. The value of the runoff is particularly important for irrigation needs for agriculture. Further work is focused on the individual components of runoff, the methods used for their separation and a detailed description of various types of runoff. The practical part includes measurement of the discharge at the Jennínsky stream catchment, located near the border with Austria, the Český Krumlov district. For analyses discharge from the hydrological years 2005 ? 2008 was chosen. And using the three selected methods of separation (method GROUND, method and method MPGM digital filter according to Chapman), which are further described and explained. These methods divide runoff into the baseflow component and direct runoff component. These results are further compared with the method of reccesion curve analyses performed on four events. The work should show the differences in results of various methods.
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