|
|
Hydrological extremes and the change in water quality of the upper Úpa river
Kavalír, Václav ; Matoušková, Milada (advisor) ; Havlíková, Petra (referee)
The presented master's thesis addresses the alteration of the rainfall-runoff regime in the upper reaches of the Úpa River and the behavior of water quality parameters during selected hydrological events. The literature review section of this thesis elaborates on fundamental knowledge about factors influencing water quality in watercourses, sources of pollution, the impact of hydrological extremes on water quality conditions, along with the behavior of individual parameters in these situations. Basic statistical methods, time series analysis, Mann- Kendall test, correlation coefficients and field survey were used for the evaluation. The results suggest there is a warming trend in the area, associated with, for example, a shift in spring melt, peak flows and a general reduction in the duration of snow cover. The overall water quality status of the river has improved significantly following several factors such as the construction of new WWTPs, reduced acidification, etc. Hydrological extremes have an impact on selected water quality assessment parameters such as basic ions, some metals, electrical conductivity, amount of organic matter in the stream (except for the parameter BOD5), etc. On the other hand, no effect was found for phosphorus, sulphate or nitrate. In the case of organic matter, aluminium or...
|
|
|
Assessment of anthropogenic modification of the river network using hydromorphological survey as an example of the upper Metuje River
Kavalír, Václav ; Matoušková, Milada (advisor) ; Kujanová, Kateřina (referee)
Human modifications and related pressure on watercourses of its ecosystem became greatly discussed problematic in the latest dry years. The translated bachelor's thesis deals with these encroachments on watercourses as well as with its impact on hydromorphological quality. In recherché there are discussed basic hydromorphological knowledge and modifications of watercourses with its negative and positive effects on the watercourse along with its surrounding. For the evaluation of the hydromorphological condition was used HEM methodology (Langhammer 2014) applied on upper course of the Metuje River. Overall, based on the outcome of the HEM methodology the upper stream of the Metuje River is evaluated as a weakly modified. Less disturbed sections can be found in the area of the National Nature Reserve Adršpašsko-Teplické skály. The largest modifications can be seen in the build-up areas of Teplice nad Metují, where these modifications come particularly from the period of the First Republic. The area of the floodplain, is the most affected area. Trace of the rivercourse was overall shorted by 1 569 meters, therefore 7,5 % since mid-19th century, chiefly in the surrounding of Teplice nad Metují. The greatest concentration of diverse modifications is in the build-up zones. Key Words: Hydromorphology,...
|
guest ::
RSS feed.