Publication details

Vývoj podzemního odtoku ve východní polovině ČR

Title in English The baseflow evolution from the eastern part of CR


Year of publication 2017
Type Article in Proceedings
Conference Podzemní voda a společnost, sborník příspěvků XV. hydrogeologického kongresu
MU Faculty or unit

Faculty of Science

Field Geology and mineralogy
Keywords Maillet's method; effective infiltration; baseflow estimation; eastern part of CR; hydrograph separation
Description Development of underground runoff was assessed on 10 locations in the eastern half of the Czech Republic between 2006 and 2015 (on two locations 1994-2016), in connection with the frequently discussed topic of climate change and its impact on the development of both surface and groundwater resources, Six locations are situated in the environment of crystalline rocks (strážecké moldanubikum, orlicko-sněžnické krystalinikum) and four in sedimentary rocks (Vienna basin, Ždánický les flysch zone, Vysoké Mýto syncline and Ústecká syncline). The development of underground runoff was evaluated by data of yield fluctuations of springs and flow rates in watercourses, provided by ČHMÚ stations. Evolution of groundwater supply in the catchment area of the monitored springs was determined from their weekly yields by the Maillet equation. Average daily flows were input data for automatic separation of the hydrogram by the PART (USGS) program, which was used for defining a development of underground drainage from the watercourses. Downward trend of the development of groundwater runoff was interpreted in the most of the river basins. Rate of decline trends differs for each river basin due to different topography, elevation or geological structure. The only exception was the catchment area of spring located in the flysch zone of Ždánice unit. Interprated data suggests that the decreasing trend of the underground drainage is probably associated with decrease of rainfall trend.

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