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Analysis and modelling the changes of water quality in the Olšava river basin.
Kaiglová, Jana
The main goal of the thesis is to create an accurate model of the current state of water quality modelling in the river basin. The basin of the Olšava River, as found in the bachelor thesis "Analysis of Water Quality in the Basin", is polluted with large concentrations of total phosphorus PTot. The master thesis analyses sources of nutrients in the basin that is mainly listed in the vulnerable areas indentified under the Nitrates Directive 91/676/EEC, on the protection of waters against pollution caused by nitrates from agricultural sources. For the water resources management and environmental policy is crucial to recognize distribution of pollution sources throughout main categories. The thesis is concerned with the seasonal variability of the average mass concentrations along the river channel. Broadly used mathematical modelling software of water quality is discussed in the sense of reliability, availability and user interface. Last but not least is a suggestion of two improvements of the water quality based on the MIKE Basin modelling software. The main aim of these proposals is to be realistic in the economical and environmental sense. Proposals consider both in point and non-point sources. Key words: Mathematical modelling, MIKE Basin, Water Quality, Water Quality models, Hydrology, Olšava
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Influence of climate force forest management on hydrological regime of headwater streams
Pícha, Zdeněk ; Stuchlík, Evžen (advisor) ; Křeček, Josef (referee)
Hydrological functions of catchment area are an important part of the ecosystem. There are three approaches that deal with the issue of catchment hydrological functions. These three approaches are summarized in the work, there are shown the advantages, disadvantages and results of some studies. Hydrological functions of catchment area, especially the runoff process, significantly affect forests growing in the catchment, especially their species composition, age and type of soil. The paper summarizes insights about how that tree species, especially beech (Fagus sylvatica) and Norway spruce (Picea abies) affects runoff, water infiltration into the soil and interception. The next section is then summary the influence of forests on floods, which is not so large as is generally expected. At the end of the work is an overview of some studies dealing with the hydrological balance and runoff processes were carried out in the headwaters of the river Litavka and outline possible further research in this area. Key words: runoff, catchment, forest, infiltration, hydrological modelling, pair catchments
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The influence of temporal rainfall distribution on hydrological characteristics of rainfall-runoff events
MIKOLÁŠOVÁ, Anna
This master thesis deals with the influence of temporal distribution of precipitation on hydrological characteristics of the rainfall-runoff process. The practical part of the thesis was carried out on the drainage basin Volšovka. In the theoretical part, the origin, division, and temporal distribution of rainfall is described, as well as surface runoff and some chosen hydrological characteristics of flow-off. Moreover the work deals with hydrological simulation, there is also described in further detail the rainfall-runoff model HEC-HMS, which is furthermore used in the practical part of this thesis. In the practical part, the characteristics of the area of interest is introduced. Next is described the preparation of the rainfall data with the use of DES_RAIN programme, also creation of the digital model of the terrain in the ArcGIS programme and the preparation of hydrological model in HEC-HMS model. In the conclusion of the thesis, the flow capacities of the closure profile of Volšovka were simulated, as well as other particular closure profiles of the catchment area. There were 16 simulations carried out, which were evaluated on the basis of the peak flow capacities and the time of culmination.
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Analysis and modelling the changes of water quality in the Olšava river basin.
Kaiglová, Jana ; Langhammer, Jakub (advisor) ; Kliment, Zdeněk (referee)
The main goal of the thesis is to create an accurate model of the current state of water quality modelling in the river basin. The basin of the Olšava River, as found in the bachelor thesis "Analysis of Water Quality in the Basin", is polluted with large concentrations of total phosphorus PTot. The master thesis analyses sources of nutrients in the basin that is mainly listed in the vulnerable areas indentified under the Nitrates Directive 91/676/EEC, on the protection of waters against pollution caused by nitrates from agricultural sources. For the water resources management and environmental policy is crucial to recognize distribution of pollution sources throughout main categories. The thesis is concerned with the seasonal variability of the average mass concentrations along the river channel. Broadly used mathematical modelling software of water quality is discussed in the sense of reliability, availability and user interface. Last but not least is a suggestion of two improvements of the water quality based on the MIKE Basin modelling software. The main aim of these proposals is to be realistic in the economical and environmental sense. Proposals consider both in point and non-point sources. Key words: Mathematical modelling, MIKE Basin, Water Quality, Water Quality models, Hydrology, Olšava
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Evaluation of erosion control measures described in GAEC II by using hydrological modeling
HRDINA, Filip
Erosion is an issue, which causes huge damages not only on agricultural land. This diploma thesis describes practical evaluation of erosion control measures (usage of leaving crop residue, circuit strips, contour tillage), which are include in Good Agriculture and Environmental Condition standart, which was issued by European union. Efficiency of usage of narrow-row and wide-row crops is also modeled. Each measures were evaluated in two different modeling programmes HydroCad for calibration and ERCN for results comparison. Seven different scripts are used in the thesis. Subcatchment area P6 in catchment area of Kopaninský creek is used as model area. Literature review describes the precipitation and runoff process, issue of erosion, and agriculture land protection against water erosion. Is also describes GAEC standards (today DZES).
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Verification of effeciency of GAEC II measures on specific catchment using model based on SCS-CN.
HRDINA, Filip
The erosion is one of the biggest problems of today?s agriculture, more precisely of environment. At the time when 50% of the arable soil is threatened by the erosion, initiative of the erosion protection increases at the national and at the Europien level. The aim of this bachelor?s work is to evaluate the effectiveness of erosion controls which were issued within Good agricultural and environmental condition (GAEC 2) by the Europien Union. The ERCN program and HydroCad program are used as the modeling techniques, modeling the impact of the erosion measures in 4 scenarios. The modal area is the subcatchment P6 on the catchment of Kopaninský stream. The issues of the erosion, the erosion standard GAEC 2 and hydrological modeling using methods of CN-Curve Numbers are solved in the literature review.
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Evaluation of various flood control in the catchment during extreme rainfall-runoff situations
POMIJE, Tomáš
The aim of this thesis is to clarify the impact various flood control in extreme rainfall-runoff situations in an interest basin. For this purpose, for the catchment of Kopaninsky river has been set up hydrological model in Mike SHE application. Also have been executed scenarios of different flood control, which passed through the simulation in model Mike SHE. The resulting data from simulations serve as a basis for evaluating the effectiveness and applicability of scenarios for the catchment.
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