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Vliv drenážních systémů na odtokové charakteristiky vybraného povodí
ČERMÁKOVÁ, Veronika
This bachelor thesis deals with drainage, especially drainage by drainage systems and their impact on various aspects of nature. The introductory part explains what drainage systems are, what they are used for and what they look like. Furthermore, the history and occurrence of drainage systems in the world and also in the Czech Republic are described. Subsequently, several chapters are devoted to methods of drainage and then a description of drainage systems. The following are the impacts of drainage systems on the water regime of the river basin and on the environment. After processing and analyzing data on runoff and precipitation conditions to a selected catchment area of the Jenínský stream, their behavior during the hydrological years 1984-1985, 2005-2007 and 2011-2013 was compared. In these years, the runoff coefficient was calculated, and subsequently double sum lines were constructed, which show the purpose of identifying changes in the long-term balance of precipitation and runoff.
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Processing a landscape revitalization study in a selected catchment
LEXOVÁ, Veronika
This work deals with the revitalization of the Jenínský stream, the revitalization is mainly focused on the separation of pipes from some parts of the stream. The new track of the stream including a vegetation is proposed at its spring. The revitalization also concerns the drainage system, where a new drainage trail and a retention tank are proposed. For the appropriate design of the flow capacity, drainage of water from the river catchment was calculated and the flow and concentration of the substances in the stream were analyzed. Water, its composition and hydrological cycle are generally described in the literary research. It also explains the collision-draining process and the factors that affect it. Theoretic part deals with the revitalization of watercourses and, lastly, drainage systems are described.
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Quantification of the impact of rainfall-runoff events on nutrient loads from the watershed
STREITOVÁ, Eva
This diploma thesis deals with clarification of an influence of rain discharge events on nutrients loss from drainage area and which rain discharge events are the main cause of the loss. Within the scope of this the influence of these episodes on drainage area of the Jenínský brook will be quantified, more specifically sub-drainage area J2. The thesis describes not only the circle of water in the nature, specification of rain drainage events origin, but also the very factors which influence the water drainage and the loss of nutrients caused by the drainage. Furthermore, the basic nutrients which appear the most often and in the biggest quantities in our waters are described, these being nitrogen and phosphor and last but not least what is described here is the total loss of nutrients in water during rain drainage events. The description of a drainage area itself and a water intake profile J2 follows. The water intake profile J2 was the source for processing the results. The results were processed by several computational methods, which were compared to each other in the end. The loss during 5 extreme rain events was calculated and so was their percentage representation in the total annual losses and the consecutive evaluation of the results.
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Time series analysis of precipitations in the selected area
MÁCHA, Vít
Diploma thesis extends my Bachelor´s thesis, which was about methods of time distribution of precipitations and differences in that distribution within a small area. The first part of the paper describes the formation and distribution of precipitation, typical variation of precipitation and some characteristics, revealing and describing the behaviour of rainfall in a given station. Following part describes possible methods of evaluation of time distribution. Statistical methods are presented mainly here. Here described methods and evaluations are subsequently applied in time series of daily precipitations, which has been available for this work for the Jenin creek basin. The analysis is focused on characteristics and evaluation of rainfall between terms 1980 - 1988 and 2005 - 2013. The results show us some differences between terms in rainfall characteristics. However, mostly they are not statistically significant. The work also evaluates differences in rainfall totals between rainfall stations Jenín and Dolní Dvořiště (approximate distance of the stations is 4 km) in 2005 - 2013 term. During the evaluation it comes to differences in rainfall totals. They are highly variable and they don´t have neither constant direction nor size.
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Discharge and selected water quality parameters modelling in the Jenínský stream catchment by SWAT model
HOMOLKA, Jan
The thesis continues with the bachelor thesis which had dealt with preparation bases for simulation draining and carrying materials in SWAT model. Simulation should have been realized within basin of the Jenín stream, which watershed is 4,65 km2 large. SWAT model is primary developed for the larger watersheds where simulated values doesn't attain tolerances. Because of this is thesis focused on the methodic of simulation itself, discussion of the problem when is SWAT model almost useless for the small watersheds and presentation of the calibrated values which had served as basis for verification.
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Preparation of bases for modelation draining and carrying substances in SWAT model
HOMOLKA, Jan
This bachelor thesis is dealing with preparation bases for modelation draining and carrying materials in SWAT model. Thesis includes literature search about basis of SWAT model, SWAT development, preferences and imprefections of this model. It?s also going over various modelations and general division. Further describes necessary input data, their types and requirements without which would be impossible to complete this task. I?ve chosen Jenín stream basin located near village Jenín which is approximately three kilometers eastwards from Rožmberk upon Vltava . Thanks to the possibilities of todays internet my work was simplified and looking for quality, well available bases was easier.
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