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National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
Small water reservoirs in the Krkonoše Mountains: What would their regeneration bring?
 Šádková, Eva ; Janský, Bohumír (advisor) ; Daňhelka, Jan (referee)
This thesis deals with the evaluation of influence of small water reservoirs on the extreme runoff events (floods and drought) in the upper Úpa River basin. It summarizes knowledge about both hydrological extremes and their manifestations in the basin of interest as well as about small water reservoirs in the sense of water retention measures and their possible importance during the periods of low flows or floods. In this thesis two localities of possible reservoirs at place of former splash dams in Obří důl and on the Lysečinský Brook were chosen. To assess the influence of small water reservoirs on runoff during two chosen flood events and two periods of drought, the hydrological model HEC-HMS was applied. The results of model simulation proved a positive influence of reservoirs on the reduction of flood peaks (except for a concurrence of transformed flood waves in the outlet that occurred during one flood event), but the effect was decreasing with the increasing catchment area and the intensity of precipitation and with smaller storage capacity of a reservoir. During the low flows, a positive influence of reservoirs was observed as well, relating to the release of stored water. However, the ability of a reservoir to reduce deficit volume and to balance the flow was decreasing with smaller...
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Splash dams in the Krkonoše (Giant) Mountains - the past and the present
 Šádková, Eva ; Janský, Bohumír (advisor) ; Jeleček, Leoš (referee)
The idea of renovation of former small water reservoirs (splash dams) that were used while log driving is coming to the fore in connection with an effort to gradually increase water retention capacity and to reduce runoff variability in headstream areas. On the basis of study of historical sources and literature and own field research this bachelor's thesis describes causes of origin and period of origin of the Giant Mountain's splash dams and deals with the function and the location of the splash dams in the field. The thesis also focuses on their current state. A total of 22 Giant Mountain's splash dams built mainly in the second half of the 16th century were traced. Half of them were accurately located, the rest of the splash dams were located with an accuracy of watercourses. In the thesis there are 6 diverse localities described in detail, selected from the accurately located splash dams e.g. on the base of degree of the splash dam's preservation or degree of the anthropogenic influence on the watercourse. Key words: log driving, splash dam, Giant Mountains, history, current state
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