|
|
Description of Relation between Flow and Suspended Sediment Load in a Hydromertic Profiles of a Selected Rivers
Bobková, Dominika ; Janál,, Petr (referee) ; Marton, Daniel (advisor)
The issue of the relationship between water discharge and the suspended sediment loads is a globally highly addressed topic. Knowing the suspended sediment loads in the streams avoids problems with over-filling of water cannons and thus prevents insufficient capacity of water reservoirs. This thesis is partly a follow-up to the bachelor thesis, which extends and introduces new procedures. Neural networks, more specifically multilayer perceptron neural networks, are used to analyse the relationship between water discharge and suspended sediment loads. The results of the networks are then processed in Excel into graphs and evaluated using the coefficient of determination, Nash-Sutcliffe coefficient and RMSE coefficient. The practical application is solved on two profiles - the profile Podhradí nad Dyjí and the profile Židlochovice. Each profile is examined in a different period.
|
|
|
Creating a simulation model of multi-reservoir system in the HEC-ResSim
Keilová, Nikola ; Marton, Daniel (referee) ; Menšík, Pavel (advisor)
Bachelor´s thesis is focused on the description of the programming of the device HEC-ResSim and the subsequent creation of the simulation model water system the Vír I and Brno. To create a simulation model using real data on the reservoirs. A simulation model is compiled for the management of the storage function and the calculation is carried out with a daily step. To simulate the flow of water to the system reservoir is used the real flow series. Part of the work is a translation of a clear manual to the program HEC-ResSim
|
|
|
Numerical Model of Water Flow in the Upper Reservoir Nové Mlýny
Winkler, Stanislav ; Zachoval, Zbyněk (referee) ; Marton, Daniel (advisor)
Diploma thesis is focused on understanding problematic of sedimentation in reservoirs with relation on flood episodes. For creating numerical model was necessary to ensure data about morphology of the river, granular composition of the riverbed and hydrology data. In thesis is written how were obtained these documentations, description of creating numerical model in program HEC – RAS 5.0.7. and results of done simulations of real flood episodes, which took place in years 2004, 2005, 2006, 2009, 2013. Output is evaluation each flood episode, description of grain class curves and evaluation of yearly flow before change of riverbed due to transport of sediments and after change of morphology of riverbed.
|
|
| |
|
|
Historical development of sediment deposition in upper reservoir of Nové Mlýny dam
Komorová, Magdaléna ; Marton, Daniel (referee) ; Zachoval, Zbyněk (advisor)
Master thesis is about historical deposition of sediments in the upper reservoir of Nové Mlýny from first fill up with water until present time. Beginning of the thesis concentrates on introduction of types of sediments and their behavior in rivers and reservoirs, sediment deposition in reservoirs and measures against sedimentation in reservoir. Part of the thesis consist of the creation of numerical one-dimensional model with transport of sediments on sections of rivers Dyje, Jevišovka and in the upper reservoir. Output data evaluation consist of analysis of sediment’s volume, development of bed in time and variation of bed evaluation in reservoir. Master thesis evaluates the development of water surface with different stages of sedimentation.
|
|
|
Determination of the functional volumes of the reservoir considering input data uncertainties
Paseka, Stanislav ; Doležal, Petr (referee) ; Szolgay,, Ján (referee) ; Marton, Daniel (advisor)
Damaging changes and interventions in the water cycle in our landscape caused mainly in the last century together with uncertainties from climate change are the cause of more frequent occurrences of hydrological extremes. In Hydrology, the most urgent problem is that the values of the long-term mean flows are decreasing in rivers as well as the yield of groundwater sources, but on the other hand, we cannot forget to the problem of extreme floods. In these consequences developing methods and tools to uncertainty analysis of the reservoir yield and of the reservoir flood protection is very important, useful and desired. The main aim was to determine the functional volumes of the reservoir considering input data measurement uncertainties and to quantify them and was explained how uncertainty took into account in results. The active storage capacity was determined from the historical series of monthly flows that were affected by uncertainties, next were applied on water evaporation, seepage losses of the dam and morphological volume-area curves. The simulation-optimization reservoir model was developed and temporal reliability as reservoir yield performance measures was applied. This model will extend the existing UNCE_RESERVOIR software. The flood capacity was determined from random flood wave variations were obtained by repeatedly generating uncertainty on the flood hydrograph. Software was developed based on the modified Klemes method, which was able to transform flood waves. The measurement uncertainties of data inputs were created using Monte Carlo method in both softwares. By connecting two softwares, the functional volumes of the reservoir under conditions of measurement uncertainties were complexly determined. The case study was applied to the real water reservoir, in the Morava River Basin. The result will be whether the dam is resistant to the current conditions, or the optimal design of the functional volumes of reservoir under conditions uncertainties.
|
|
| |
|
|
Water Balance Hydrological Models Method Comparison
Štolfa, Filip ; Bednář, Martin (referee) ; Marton, Daniel (advisor)
In this work, two types of lumped balance precipitation-runoff models were compiled, from which the model taken from the Sicilian regional climate model was subsequently modified and these modifications were compared with other models. The practical application was carried out in the Svratka river basin above the Vír reservoir ending in the final profile of Dalečín. The input data from this river basin were precipitation totals, average temperatures and flows in the final profile, from which the calculation was subsequently performed in a monthly step. The individual models were compiled in two variants differing in the length of the time series and the number of regression coefficients. All assembled models were subsequently calibrated using four calibration criteria, for which the effectiveness was verified during validation by one common criterion. At the end of the work, individual models and calibration criteria are compared.
|
|
|
General Runoff Water Balance Model of a River Basin
Černý, Vojtěch ; Knoppová, Kateřina (referee) ; Marton, Daniel (advisor)
Modelling of the rainfall-runoff process is one of the basic scientific skills in hydrology. Rainfall-runoff modelling can help to improve water management, handling of the reservoir's storage volume, or also to facilitate adaptation to current climatic conditions. The aim of the diploma thesis is to create a functional rainfall-runoff model on the basis of water balance equations based on the lumped water balance principle of the hydrological model. Several modifications of the general rainfall-runoff model are approached in the diploma thesis. Four types of the daily evapotranspiration determination are used in the calculations. The rainfall-runoff model is compiled from temperature data and precipitation totals in a daily step. The practical application is carried out on a sub-basin of the river Dyje, which is located above Vranov water reservoir. The main output is a series of daily flow rates that were obtained from calibrated rainfall-runoff models. The best rainfall-runoff model takes into account the water from snow cover melting, the value of the Nash Sutcliffe calibration criterion of this model is 0.608. Finally, the hydrological simulation for the period 2021-2060 is performed in the diploma thesis.
|
|
| |
guest ::
RSS feed.