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Draft measures against floods in the basin of a small watercourse Mlýnka
Řeháková, Adéla ; Jaroš,, Lubomí (referee) ; Starý, Miloš (advisor)
This thesis is concerned with protection against flooding in the basin of a small watercourse Mlýnka. The aim is to get information about runoff in the watershed and the proposal dry reservoir as flood measure. The first part of thesis deals with the survey watershed, getting materials, schematisation watershed, constructing rainfall-runoff process. In the second part is designed dry reservoir. Schematisation has been made using ArcGIS, rainfall-runoff process was done in software HYDROG and drawings have been processed by AutoCAD.
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Assessment of selected parts of the sewer system in the village
Balas, Jan ; Úterský, Michal (referee) ; Hluštík, Petr (advisor)
The Bachelor´s thesis is focused on software products in hydraulic design and assessment of sewer networks. The thesis is consist of research part, where the commonly used programs in Czech Republic and abroad are listed. The next part aims to describe hydro-dynamic simulation model Storm Water Managment Model, which is free to download from U.S. EPA websites. The practical part deals with creating a model of the sewer network by the SWMM and hydraulic assessment of selected parts of the sewer system in the village Lipůvka, South - Moravian region.
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Simulating flows in a measure profile using artificial intelligence methods
Pavelková, Růžena ; BBA, Šárka Zemanová, (referee) ; Kozel, Tomáš (advisor)
The thesis examines the possibility of using artificial intelligence methods for simulating average daily flows in selected measure profiles. In the theoretical part the main factors of the rainfall-runoff process and the methods used in the practical part are described. The practical part of the thesis deals with the construction of two models. The first model predicts the flow for episodes emanating only from rain events, the second model additionally considers snow cover. Artificial intelligence methods, specifically neural networks, are used to build the model, which are created in the MATLAB working environment. The selected criteria were used to evaluate the outputs of the models. Finally, the limits of applicability of the developed models containing neural networks were determined. In general, acceptable results were achieved.
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Precipitation and water runoff in the catchment with mosaic of arable land, forests and built-up areas
SCHWARZOVÁ, Monika
This thesis examines the influence of land cover and land use on rainfall-runoff patterns in small catchments. The literature review presented the rainfall-runoff process in general, runoff and the factors that influence runoff. In the practical part of the thesis, the different months of the 2018 study period were presented and converted into graphical form and the differences in rainfall-runoff ratios for two delineated small catchments with significantly different landscape cover were discussed. Specific surface water runoff from catchments with purely forest cover and catchments with a mosaic of cropland, forest, grassland and built-up areas were compared. Runoff responses to rainfall events were also monitored. Measurements of water level in the watercourse with an ultrasonic water level sensor and measurements of water velocity in the watercourse with a hydrometric propeller were used to calculate specific runoff rates. A boat rain gauge was used to measure precipitation. The results showed that the specific runoff from watersheds with forest cover is generally lower and slower due to interception and increased surface roughness compared to runoff from watersheds with a mosaic of cropland, forest, grassland and developed areas. Forest cover in the catchment reduces and slows runoff, particularly during shortterm significant rainfall episodes, and helps to maintain stable runoff from the landscape during drought episodes. In general, the results indicate the importance of vegetation in the landscape for its hydrological characteristics. Finally, modifications to improve the conditions in these small catchments were suggested.
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Analýza srážko-odtokových vztahů na vybraném povodí
FREJLACHOVÁ, Dagmar
This bachelor is focused on analysis of rainfall-runoff relationships. The theoretical part of the thesis defines water in nature, hydrological balance, the rainfall-runoff process, and characteristics of its parts. Rainfall-runoff events and ways of analysing the relationships between rainfall and runoff are also described. The practical part is focused on analysis of rainfall-runoff relationships on the catchment of Jenínský stream in the hydrological years 2011-2013. Description of the catchment, processing of the rainfall and runoff data, creating of hydrographs and runoff coefficients for each hydrological year and selected rainfall-runoff events are part of the thesis as well.
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Modeling hydrological response of the catchment to various precipitation events
ŠVANDA, Dominik
This thesis deals with the simulation of the hydrological response of a river basin to various precipitation events. The hydrological response was simulated in the Olešenský brook basin. The outflow of water from the landscape is influenced by many different factors at the same time. Among the most important factors are, for example, the slope of the terrain, land use, saturation of the soil profile withwater, anthropogenic influences, vegetation cover and last but not least the geological and soil conditions, the shape and area of the river basin, climatic conditions etc. explained and described in detail. Several methods are used to calculate the water runoff from the landscape, in which case the CN curve method was used to calculate the direct runoff from the landscape. By using the BPEJ map, land use and maximum daily precipitation totals with a probability of repeating N years (2, 10, 20, 50 and 100 years) obtained from the rainfall station Týn nad Vltavou, calculations were performed first in a numerical (vector) way and then the maps of direct water runoff from the catchment area were created in a raster way performed in ArcMap software. In the next step, various scenarios were simulated that influenced the outflow of water from the catchment. The first scenario was a change in soil saturation with water, resp. water content in the soil (dry, medium and wet). It has been found that the outflow of water from the basin and the peak flow were both fundamentally changed. Second scenario was grassing of all arable land in the basin, where the actual state compared to the theoretical state. This change reduced the CN curve values, what in turn reduced the direct water runoff from the landscape. Third and the last scenario was the concept of 20 metres wide infiltration strips along roads, watercourses and water areas. The proposed measure reduced the runoff coefficient values by about 1 % compared to the runoff coefficients at the actual state. In this case, there was no fundamental change as the strips occupy only a small part of the total area. However, infiltration strips still have a positive effect on rainfall-runoff events in the landscape.
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Land cover changes in Ore Mountains and their possible impact on rainfall-runoff process
Kratochvílová, Petra ; Jeníček, Michal (advisor) ; Královec, Václav (referee)
Land cover changes in Ore mountains and their possible impact on rainfall-runoff process Abstract Land cover changes have occurred since the formation of Earth, but increasingly, these changes mainly in anthropogenic characters, a big problem in many places around the world. It is, therefore, necessary to monitor how land cover changes, and its impact on individual natural processes and use these results of studies in preventing or fix possible consequences of these changes. More and more disciplines are, therefore, also examines this issue. This paper deals with the assessment of land cover change and its impact on rainfall- runoff process, focusing mainly on mountain basin where this influence manifests itself most expressive, both influencing the water balance of the basin, and influence responses to extreme hydrological events. The findings are applied to the upper basin Chomutovka in the Ore mountains where the thesis evaluates changes in land cover on the basis of aerial photos from 1975, 1987 and the present day (2010). Changes are visualized using digital vectorization and color differentiation of areas of individual land cover types, further processed into a map series and subsequently quantified. According to the results are established the major factors of possible rainfall-runoff processes in...
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Analýza srážko-odtokových procesů a erozních charakteristik vybraného povodí při různém uspořádání krajiny
VANČUROVÁ, Lenka
The diploma thesis focuses on the analysis of rainfall-runoff processes and erosion characteristics of selected catchment in different landscape management. This analysis was solved at the Lukavecký brook catchment, which is located in the Pelhřimov district in Vysočina region. The theoretical part of the thesis describes the rainfall-runoff process and then focuses more on individual processes. It also characterizes water erosion, its consequences, forms and erosion control. At the end of the theoretical part are described methods of calculation of water runoff and water erosion. The practical part describes the catchment of the Lukavecký brook, its characteristics of natural conditions and the threat of water erosion. Then there is a procedure for processing of bases and data in the program ArcGIS. Subsequently, it includes an assessment of the different measures and changes in the type of land to drain water from the catchment and erosion threat.
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Land cover changes in Ore Mountains and their possible impact on rainfall-runoff process
Kratochvílová, Petra ; Jeníček, Michal (advisor) ; Královec, Václav (referee)
Land cover changes in Ore mountains and their possible impact on rainfall-runoff process Abstract Land cover changes have occurred since the formation of Earth, but increasingly, these changes mainly in anthropogenic characters, a big problem in many places around the world. It is, therefore, necessary to monitor how land cover changes, and its impact on individual natural processes and use these results of studies in preventing or fix possible consequences of these changes. More and more disciplines are, therefore, also examines this issue. This paper deals with the assessment of land cover change and its impact on rainfall- runoff process, focusing mainly on mountain basin where this influence manifests itself most expressive, both influencing the water balance of the basin, and influence responses to extreme hydrological events. The findings are applied to the upper basin Chomutovka in the Ore mountains where the thesis evaluates changes in land cover on the basis of aerial photos from 1975, 1987 and the present day (2010). Changes are visualized using digital vectorization and color differentiation of areas of individual land cover types, further processed into a map series and subsequently quantified. According to the results are established the major factors of possible rainfall-runoff processes in...
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Draft measures against floods in the basin of a small watercourse Mlýnka
Řeháková, Adéla ; Jaroš,, Lubomí (referee) ; Starý, Miloš (advisor)
This thesis is concerned with protection against flooding in the basin of a small watercourse Mlýnka. The aim is to get information about runoff in the watershed and the proposal dry reservoir as flood measure. The first part of thesis deals with the survey watershed, getting materials, schematisation watershed, constructing rainfall-runoff process. In the second part is designed dry reservoir. Schematisation has been made using ArcGIS, rainfall-runoff process was done in software HYDROG and drawings have been processed by AutoCAD.
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