Response of spring yield dynamics to climate change across altitude gradient and varied hydrogeological conditions

0585090 - ÚVGZ 2025 RIV NL eng J - Článek v odborném periodiku
Lamačová, A. - Ledvinka, O. - Bohdálková, Leona - Oulehle, Filip - Kreisinger, J. - Vlnas, R.
Response of spring yield dynamics to climate change across altitude gradient and varied hydrogeological conditions.
Science of the Total Environment. Roč. 921, APR (2024), č. článku 171082. ISSN 0048-9697. E-ISSN 1879-1026
Grant CEP: GA TA ČR(CZ) SS02030040
Institucionální podpora: RVO:86652079
Klíčová slova: data quality-control * time-series * streamflow * discharge * runoff * trends * evapotranspiration * records * Groundwater * Drought * Seasonal yield fluctuations * Transmissivity * Trend analysis * Linear mixed effect model
Obor OECD: Climatic research
Impakt faktor: 9.8, rok: 2022
Způsob publikování: Omezený přístup
https://www.sciencedirect.com/science/article/pii/S004896972401221X?via%3Dihub

Springs offer insights into groundwater dynamics. Long-term monitoring of spring yields can reflect the response of groundwater storage to climate change. We analyzed the yield trends of 136 springs across 18 hydrogeological regions in Czechia from 1971 to 2020. The trendfree prewhitening MannKendall test and linear mixedeffects models were used to assess environmental impacts on spring yields. Overall, 71 % of the springs showed no longterm trends, 28 % exhibited decreasing trends, and 1.5 % showed increasing trends in annual spring yields. Altitude has been demonstrated as a contributing factor influencing spring responses to climate change. Lowland springs (<300 m a.s.l.) exhibited the highest proportion of decreasing annual trends (41 %), while uplands (300-600 m a.s.l.) and highlands (>600 m a.s.l.) showed declines in 26 % and 25 % of springs, respectively. Moreover, highlands recorded a 7 % yield increase, indicating a complex interplay between altitude and spring response to climatic factors. A strong positive correlation was found between precipitation and yields (p < 0.01), whereas temperature increases negatively affected spring yields (p < 0.01). The interaction between temperature changes and region transmissivity highlighted the vulnerability of springs in low-transmissivity regions, predominantly those in crystalline and flysch bedrock areas, to climatic shifts. Generally, these regions have lower spring yields compared to the high-transmissivity areas of the Cretaceous basins. Although these loweryield regions are not used as a primary water source for large areas, unlike regions with high-transmissivity bedrock, they provide water resources for local supply. Analysis of annual spring maxima frequencies revealed a shift in the culmination of maxima occurrences from April to March, with a significant decrease in April (p < 0.05) and May (p < 0.1) and an increase in March (p < 0.05), suggesting a change in spring yield seasonality. The 2015-2020 drought significantly accelerated declining spring yield trends across hydrogeological regions.
Trvalý link: https://hdl.handle.net/11104/0353026