Hydrochemical Fluxes and Bedrock Chemistry in three Contrasting Catchments Underlain by Felsic, Mafic and Ultramafic Rocks

0476513 - ÚVGZ 2019 RIV NL eng C - Konferenční příspěvek (zahraniční konf.)
Krám, Pavel - Čuřík, Jan - Veselovský, F. - Myška, Oldřich - Hruška, Jakub - Štědrá, V. - Jarchovský, T. - Buss, H. L. - Chuman, Tomáš
Hydrochemical Fluxes and Bedrock Chemistry in three Contrasting Catchments Underlain by Felsic, Mafic and Ultramafic Rocks.
15th water-rock interaction international symposium, WRI-15. Amsterdam: Elsevier, 2017, s. 538-541. Procedia Earth and Planetary Science, 17. ISSN 1878-5220.
[Water-Rock Interaction International Symposium /15./. Evora (PT), 16.10.2016-21.10.2016]
Grant CEP: GA ČR(CZ) GA15-08124S
Institucionální podpora: RVO:86652079
Klíčová slova: granite * amphibolite * serpentinite * Norway spruce * magnesium * coefficient of alkalinity of rocks
Obor OECD: Water resources

Bedrock chemistry from three drill cores and fluxes of precipitation, throughfall and runoff from the 2015 water year were examined in three forested catchments in the western Czech Republic. The coefficient of alkalinity of rocks at the granitic (felsic) LYS catchment fall in the low chemical reactivity category. Rocks from the amphibolitic (mafic) NAZ catchment have high reactivity and rocks from the serpentinitic (mostly ultramafic) PLB catchment have high or even very high reactivity. Streamwater fluxes reflected the composition of the underlying bedrock lithologies, especially for magnesium, nickel and chromium at PLB, and for calcium, arsenic and sulfur at NAZ. Streamwater at LYS reflected incomplete neutralization of acidic deposition in the catchment and had mostly negative alkalinity and correspondingly very high fluxes of potentially toxic inorganic monomeric aluminum. Internal cycling of magnesium and calcium in spruce canopy throughfall was influenced by substrate chemistry at PLB and NAZ. About half of streamwater nitrogen left the catchments in the organic form.
Trvalý link: http://hdl.handle.net/11104/0272993