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Estimation of Stage Discharge Curves in Hydrometric Profile
Hillebrant, Michael ; Menšík, Pavel (referee) ; Marton, Daniel (advisor)
Bachelor thesis is focused on the stage-discharge curves evaluation on the selected hydrometric stations and on the selected rivers in the Morava River basin, which the Czech Hydrometeorological Institute managing. The goal of this barcelor thesiss is using own calculation and specialized software to construct theoretical stage discharge curve on the basis of real measured Qh points of stage-discharge curve. The resulting theoretical curves then compared as well as create a dataset and compare the regression coefficients and regression equations of theoretical stage-discharge curves. These comparisons performed for the selected profiles in the upper, middle and lower part of river and make an overall assessment of the success of the fit. Profiles at upper part of the Svratka river was Borovnice on the Svratka river Svratka. Rozhrani on the Svitava river. Middle profiles were Brno – Poříčí on the Svratka and the Poříčí on the Křetínka River, which inflows into the Svitava river. Lower profiles were Bílovice Svitavou on the river Svitava river and Želešice on the Bobrava river, which is tributary catchment to the river Svratka. Data is divided into all sections in three modes. Summer season (May to October), winter (November-April). In the third period remained unfiltered data.
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Evaluation Of Uncertainties Of River Flow Measurements With Propeller Current-Meter
Niemiec, Łukasz ; Macura,, Viliam (referee) ; Kožnárek, Zdeněk (referee) ; Starý, Miloš (advisor)
The development of hydrology and the need of getting exact data increase the demands on hydro metering. Measurement of spot velocities and deriving the flow of water are frequently performed by the workers of Český hydrometeorologický ústav (Czech Hydrometeorological Institute) and other companies. The limited precision of the measuring machines, the imperfection of methods and the influence of human senses cause that we are not able to get the accurate value of quantity. We are just close to the right values. The term uncertainty of measuring determines the interval which is assigned to each measurement and contains the real value of measured quantity. Twenty imminently repeated measurement were done in twelve measuring profiles of the Dyje River and in one profile of the Morava River using the current meters OTT (OTT Hydromet, 2013) type C2 and type C31. We investigated the dependence of uncertainties type A and B in different profile parameter. The measurement was done with the suspension bar with 2 to 4 propeller current-meters. The hydrometric car on the bridge was used in deeper waters. The results were analysed from the point of view of the uncertainties and generalized. Next point of the research was to find out how the frequency of the current meter depends on temperature of water. For this purpose, the specific canal was made in the Faculty of Civil Engineering in Brno (Ústav vodního hospodářství krajiny) and the measuring was done in temperature interval from 1 °C to 24 °C. Repeated measuring was statistically evaluated from the uncertainties point of view. In the thesis, the proposal of elaboration of uncertainties determined by both types of measurement into current methods of determination of uncertainties of the derived flows using the measurement of spot velocity by the propeller current-meter in measuring profiles of the rivers is introduced.
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Evaluation Of Uncertainties Of River Flow Measurements With Propeller Current-Meter
Niemiec, Łukasz ; Macura,, Viliam (referee) ; Kožnárek, Zdeněk (referee) ; Starý, Miloš (advisor)
The development of hydrology and the need of getting exact data increase the demands on hydro metering. Measurement of spot velocities and deriving the flow of water are frequently performed by the workers of Český hydrometeorologický ústav (Czech Hydrometeorological Institute) and other companies. The limited precision of the measuring machines, the imperfection of methods and the influence of human senses cause that we are not able to get the accurate value of quantity. We are just close to the right values. The term uncertainty of measuring determines the interval which is assigned to each measurement and contains the real value of measured quantity. Twenty imminently repeated measurement were done in twelve measuring profiles of the Dyje River and in one profile of the Morava River using the current meters OTT (OTT Hydromet, 2013) type C2 and type C31. We investigated the dependence of uncertainties type A and B in different profile parameter. The measurement was done with the suspension bar with 2 to 4 propeller current-meters. The hydrometric car on the bridge was used in deeper waters. The results were analysed from the point of view of the uncertainties and generalized. Next point of the research was to find out how the frequency of the current meter depends on temperature of water. For this purpose, the specific canal was made in the Faculty of Civil Engineering in Brno (Ústav vodního hospodářství krajiny) and the measuring was done in temperature interval from 1 °C to 24 °C. Repeated measuring was statistically evaluated from the uncertainties point of view. In the thesis, the proposal of elaboration of uncertainties determined by both types of measurement into current methods of determination of uncertainties of the derived flows using the measurement of spot velocity by the propeller current-meter in measuring profiles of the rivers is introduced.
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Estimation of Stage Discharge Curves in Hydrometric Profile
Hillebrant, Michael ; Menšík, Pavel (referee) ; Marton, Daniel (advisor)
Bachelor thesis is focused on the stage-discharge curves evaluation on the selected hydrometric stations and on the selected rivers in the Morava River basin, which the Czech Hydrometeorological Institute managing. The goal of this barcelor thesiss is using own calculation and specialized software to construct theoretical stage discharge curve on the basis of real measured Qh points of stage-discharge curve. The resulting theoretical curves then compared as well as create a dataset and compare the regression coefficients and regression equations of theoretical stage-discharge curves. These comparisons performed for the selected profiles in the upper, middle and lower part of river and make an overall assessment of the success of the fit. Profiles at upper part of the Svratka river was Borovnice on the Svratka river Svratka. Rozhrani on the Svitava river. Middle profiles were Brno – Poříčí on the Svratka and the Poříčí on the Křetínka River, which inflows into the Svitava river. Lower profiles were Bílovice Svitavou on the river Svitava river and Želešice on the Bobrava river, which is tributary catchment to the river Svratka. Data is divided into all sections in three modes. Summer season (May to October), winter (November-April). In the third period remained unfiltered data.
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