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Artificial drainage systems in the Czech Republic and their impact on catchment water regime
ČERVONYJ, Jakub
In this diploma thesis the issue of drainage system influence on water regime of catchment area was solved. The aim of the thesis was to analyze influence of drainage system on specific catchment area using mathematical, hydrological and statistical methods. In the teoretical part, the thesis describes the issue of drainage (specifically the drainage system of area of the Czech republic) and the influence of drainage system on water regime. In the practical part an analysis of the catchment area of Kopaninský creek and subcatchment areas P6, P52 and P53 was performed. At all of those areas, certains parts are dewatered by subsurface systematic drainage system, those parts are described in detail. The runoff coefficients and specific runoff from each subcatchment areas in different time interval were calculated and observed. Runoff separation and precipitation-runoff situation analysis were performed. The results are evaulated in the chapter Results and Discussion.
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Analysis of the impact of drainage systems for surface water quality
KAMARÝT, Jiří
This Diploma thesis is following the previous Bachelor thesis which mainly focuses on drain systems and the analysis their influence of the quality of surface water. The literature review contains the description of surface water quality, substances causing the eutrophication, drainages and drain systems. Also the mechanisms influencing the change of quality of surface water after the the drain systems construction are included. In the chapter "Methodology", there are the statistical methods for concentration evaluation exposed, also the detiled description of setting up the crossing of empirical line for concentration substances in water and the drain separation methods with the aim to set the average phosporus and nitrogen concentration within the each drain component are covered. All of the evaluation which are followed by methodology in relation to sites of interest are described in detailed way in the chapter called "Material". The chapter "Results and discussion" focuses on overall description and evaluation of all the results.
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Influence of drainage systems in the basin water regime
NOCAROVÁ, Hana
In this thesis I generally address draining systems and their influences on the water regime of a river basin. In the first part I describe the history from ancient times to the present, development in the world and in the Czech Republic at the range from 2000 years before Christ to the current systems. The thesis also explains basic terms, such as the content of agricultural ameliorations, terms relating to dewatering, purposes and division of draining systems, methods of dewatering actions, effects of water-logging and their consequences. At the end the thesis describes the impacts of building drains for draining off, dewatering and floods and the impact on the environment. The objective of the thesis is to describe the impacts and influences of drainage on the water regime of a river basin and the associated problems.
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Comparison of precipitation and runoff in the research area Jenin in relation to nitrates.
ŠULCOVÁ, Lucie
The influence of precipitation on runoff characteristics of tile drainage systems and nitrate concentrations in drainage water were evaluated in this thesis. The Jeninsky stream catchment is located at the foothill of Sumava Mountains near the border checkpoint Dolni Dvoriste. Extensive agriculture (pasture) is practised in the catchment as well as surrounding areas. Above mentioned evaluated characteristics were measured on two closure profiles of tile drained subcatchments. Discharges were measured continously, water quality was sampled forthnigtly. Evaluated hydrologic year 2007 was rich in rainfall {--} the precipitation amounted to 892 mm, which is classified as a wet year, despite of 41 days long dry period. Runoff characteristics don{\crq}t vary much in both subcatchments, due to similar area and land use on researched catchments. Long dry period did not cause zero discharges. The progress of nitrate concentrations in subcatchments is characterized by low variations in values. Relatively low values (90-percentil of nitrate concentrations in individual catchments belong to II. and III. class of water quality limits set by Czech legislative) occured in the catchment. These values correspond or slightly exceed values monitored on surrounding simirarly used areas, but are significantly lower than values monitored in areas, where intensive agriculture is practised. This confirms positive influence of grassing on nitrate pollution of drainage and surface water.
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