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Creating a Hydrological Model to Determine Maximum Runoff from a Small Catchments
Hakl, Petr ; Pospíšilík, Šimon (referee) ; Menšík, Pavel (advisor)
The aim of the thesis is to set a hydrology model based on existed methodology DesQ-MaxQ, which comes from "Designing flows from a very small catchments" established in 1989. The model is able to set a nearest meteorology station and his 24-hours rainfall depths for periods of repetition 2,5,10,20,50 and 100 years. Substitute rainfall depths are set by "reduction of 24-hours rainfall depths" methodology. According to hydraulic and hydrology conditions of catchment, duration of the critical rains for each period of repetition are set also peak flow rates and total runoffs from the catchment. Application can work in two modes - "one slope" and "two slopes". The second option also includes calculation of design duration for the model catchment and superposition of hydrograph. Application RainRunoff was develop in C# programming language with graphic user interface and option to exports hydrographs.
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Rainfall Runoff Model of the Kotojedka River Basin
Černá, Daniela ; Starý, Miloš (referee) ; Marton, Daniel (advisor)
The bachelor’s thesis deals with the modeling of the rainfall-runoff process in the Kotojedka river basin. Since there is no continuous hydrological measurements in the catchment, the main task was to develop a hydrological model using the HEC HMS software and then validate it using the additional calculation of the design flood hydrograph according to A. Čerkašin method. Moreover, a N-year return period flood hydrographs were derived, which can be used as a basis for flood protection measures planning in the river basin area and in the adjacent cadastral area of the Kroměříž city. The creation and simulation of the hydrological model were carried out for several model settings, respectively different methods for the calculation of hydrologic and hydraulic transformation of the water flow in the river network were tested and subsequently compared with each other.
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Výpočet odtokových poměrů v GIS v závislosti na kvalitě DMT vzniklých z různých vstupních dat
PLIC, Vítězslav
This thesis deals with the calculation of runoff parameters in the Třísov stream catchment using geographic information systems (GIS). Various digital terrain odels were created and compared from different input data, including the digitization of existing maps and the surveying of the terrain using GNSS and tachymetry methods. Subsequently, runoff ratios were calculated for design rainfall events along with other input data. The thesis examines the impact of input data quality on the accuracy of runoff ratio determination in a small catchment. The analysis includes the examination of runoff paths, the comparison of runoff before and after adding an unknown watercourse to the digital terrain model, and the determination of the amount of water retained in the watercourse. The aim of this thesis was to improve the quality of input data for more precise and reliable determination of runoff parameters in the landscape.
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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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Modeling the impact of the potential anti-erosion measures in the selected area
KOKEJL, Karel
This diploma thesis deals with the topic of water erosion. Specifically, it is a matter of mitigating this process by applying an suitable anti-erosion measure. One of the goals of this work is that a suitable system of anti-erosion measures with a focus on technical anti-erosion measures is proposed for the selected area. Other technical aspects of implementation into the existing digital elevation model and verification of its functionality using the USLE equation in GIS (in this case in the ArcMap program) and modeling of povrchového runoff. In the theoretical parts of the work, the reader is acquainted with the basics of water erosion, detection of water erosion and anti-erosion hazards. Then it is introduced the introduction of the area of interest and the methodological procedure of the work, which is focused mainly on the calculation of erosion and dimensioning of anti-erosion measures.
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Studie odtokových poměrů vybraného povodí pomocí hydrologického modelování
Gottwaldová, Petra
The diploma thesis "Study of runoff conditions of selected river basin using hydrological modeling" deals with analysis of runoff conditions and retention abilities of the Kašnice stream basin in the Břeclav district. The theoretical part deals with the literature review of the issue and the characteristics of the selected drainage area. Obtained information about surface cover types, hydrologic soil groups and CN curves numbers were processed in ArcGIS. The outputs were then used as input for the DesQ-MAXQ hydrological model. The resulting values of specific flow, time of concentration, potential retention, water retention and direct runoff volumes are presented in the form of attached map outputs. The result of the work is the evaluation of runoff conditions of the given 4th order river basin.
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Creating a Hydrological Model to Determine Maximum Runoff from a Small Catchments
Hakl, Petr ; Pospíšilík, Šimon (referee) ; Menšík, Pavel (advisor)
The aim of the thesis is to set a hydrology model based on existed methodology DesQ-MaxQ, which comes from "Designing flows from a very small catchments" established in 1989. The model is able to set a nearest meteorology station and his 24-hours rainfall depths for periods of repetition 2,5,10,20,50 and 100 years. Substitute rainfall depths are set by "reduction of 24-hours rainfall depths" methodology. According to hydraulic and hydrology conditions of catchment, duration of the critical rains for each period of repetition are set also peak flow rates and total runoffs from the catchment. Application can work in two modes - "one slope" and "two slopes". The second option also includes calculation of design duration for the model catchment and superposition of hydrograph. Application RainRunoff was develop in C# programming language with graphic user interface and option to exports hydrographs.
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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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Solution erosion protection on a Complex Land Consolidation model
SKALA, Milan
The topic of this master thesis is the solution of erosion protection on a complex land consolidation model. The first part deals with land consolidation, erosion, factor influencing erosion a erosion protection. The second part focuses on the cadastral of Záborná, where average soil loses on land blocks according to universal Wischmeier and Smith equation and CN curves are calculated. Organizational, agrotechnical and technical character of the erosion protection is suggested for the cadastral.
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