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Hydrological Drought in Headwaters of Šumava Mountain
Skála, Vít
This master thesis if focused on the phenomenon of hydrological drought in the Šumava (Bohemian/Black Forrest) region. Hydrological drought is defined on seven hydrological stations (Modrava (CZ), Rejštějn (CZ), Sušice (CZ), Zwiesel (DE), Teisnach (DE), Chamerau (DE), Kalteneck (DE)) during period 1931-1937 and 1949-2014. The aim is in finding suitable hydrological dought indexes and other methods and apply them od the data. Results are compared each other and also are compared with studies that were proceed in non-mountainous region. For hydrological drought evaluation the threshold concept and method according Gumbel 1963 were used and deficite volumes were calculated. Seasonality graphs and graphs for nuber of drought days in hydrological years were constructed, For trends defining, Mann.Kendall and Hisch-Slack tests were used. Hydrological drought sesonality is different on german and czech side, it means effect of exposition towards southwest winds. Hydrological drought is concetrated in autumn at german stations and in winter on czech stations. Number of drought episodes decreases with decreasing elevation. There were found significant decreasing trends in drought episodes occurance in time. Monthly trends aren't so clear. On czech side there is significant decreasing trend in winter months,...
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Influence of physiogeographic conditions on runoff extremity (Case study: Comparison of small catchments in the central area of Šumava Mountains)
Hojovec, Daniel ; Janský, Bohumír (advisor) ; Matoušková, Milada (referee)
In connection with the increasing occurrence of extreme hydrological situations, new opportunities for flood protection are emerging. Among these options also includes the gradually increase water retention capacity and to reduce runoff variability in headstream areas. This bachelor thesis deals with the comparison of three physical geographical different river basins in the headstream area of Šumava mountains. The main aim of this study is a research influence of physiogeographic conditions on runoff extremity in the catchment of individual selected streams on the basis of a comparative analysis. Extremity runoff is represented by selected flood situations that were processed on the basis of data from the experimental monitoring of Department of Physical Geography and Geoecology, Faculty of Science, Charles University in Prague. The opening part of this thesis consists of literary research, physical geographical and hydrographical characteristics of all catchment areas. The main part of the thesis is focused on description and comparison of extreme situations in the monitored catchments. The conclusion of the thesis is an evaluation, which consists in the assessment of the influence of physiogeographic conditions on runoff extremity. In the final evaluation it was found that the reaction of Černý...
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Hydrological Drought in Headwaters of Šumava Mountain
Skála, Vít ; Janský, Bohumír (advisor) ; Kocum, Jan (referee)
This master thesis if focused on the phenomenon of hydrological drought in the Šumava (Bohemian/Black Forrest) region. Hydrological drought is defined on seven hydrological stations (Modrava (CZ), Rejštějn (CZ), Sušice (CZ), Zwiesel (DE), Teisnach (DE), Chamerau (DE), Kalteneck (DE)) during period 1931-1937 and 1949-2014. The aim is in finding suitable hydrological dought indexes and other methods and apply them od the data. Results are compared each other and also are compared with studies that were proceed in non-mountainous region. For hydrological drought evaluation the threshold concept and method according Gumbel 1963 were used and deficite volumes were calculated. Seasonality graphs and graphs for nuber of drought days in hydrological years were constructed, For trends defining, Mann.Kendall and Hisch-Slack tests were used. Hydrological drought sesonality is different on german and czech side, it means effect of exposition towards southwest winds. Hydrological drought is concetrated in autumn at german stations and in winter on czech stations. Number of drought episodes decreases with decreasing elevation. There were found significant decreasing trends in drought episodes occurance in time. Monthly trends aren't so clear. On czech side there is significant decreasing trend in winter months,...
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