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@article{2307619,
author = {Kanduč, Tjaša and Geršl, Milan and Geršlová, Eva and McIntosh, Jennifer},
article_number = {3},
doi = {http://dx.doi.org/10.1007/s10498-023-09414-3},
keywords = {River systems; Silicate catchment; Stable isotopes; Mineral and elemental composition; Weathering intensity; Svratka river},
language = {eng},
issn = {1380-6165},
journal = {Aquatic Geochemistry},
title = {Temporal and Seasonal Variations of Silicate Svratka River and Sediment Characterization, Czech Republic: Geochemical and Stable Isotopic Approach},
url = {https://doi.org/10.1007/s10498-023-09414-3},
volume = {29},
year = {2023}
}
TY - JOUR
ID - 2307619
AU - Kanduč, Tjaša - Geršl, Milan - Geršlová, Eva - McIntosh, Jennifer
PY - 2023
TI - Temporal and Seasonal Variations of Silicate Svratka River and Sediment Characterization, Czech Republic: Geochemical and Stable Isotopic Approach
JF - Aquatic Geochemistry
VL - 29
IS - 3
SP - 145-171
EP - 145-171
PB - Springer
SN - 13806165
KW - River systems
KW - Silicate catchment
KW - Stable isotopes
KW - Mineral and elemental composition
KW - Weathering intensity
KW - Svratka river
UR - https://doi.org/10.1007/s10498-023-09414-3
N2 - This study investigated weathering and hydrobiogeochemical processes in a silicate dominated watershed (Svratka river) in the Czech Republic in comparison with nearby carbonate dominated catchments. Elemental and isotopic analysis of river waters, particulates and sediments provided a more holistic view of weathering contributions, anthropogenic contamination, biological activity and evasion or sinks of CO2 to the atmosphere. In water samples, we determined total alkalinity after Gran 1974, and cations and anions were determined with inductively coupled plasma-optical emission spectrometer and ion chromatograph. delta C-13(DIC) in water samples was determined with isotope ratio mass spectrometer. pCO(2) and saturation indexes of calcite and dolomite were calculated with PHREEQC speciation program. Evasion fluxes were calculated after Broecker, 1974. Isotopic composition of carbon and nitrogen in particulate matter and sediments were determined with isotope ratio mass spectrometer. Mineral composition of sediments was determined with XRD method and elements with XRF method. Further enrichment factors of elements were calculated. The Svratka river, which is the major tributary of the Dyje river, is dominated by Ca2+ > Na+ > Mg2+ > K+ and HCO3- (as total alkalinity). Partial pressure (pCO(2)) concentrations range from close to 0-572-fold of atmospheric pressure. Isotopic composition of carbon in dissolved inorganic carbon (delta C-13(DIC)) value ranged from - 13.3 to - 8.0 parts per thousand reflecting degradation of organic matter and exchange with the atmosphere. Bicarbonate weathering intensity for the Svratka river at its mouth is 11.8 mol/(l center dot km(2)center dot s), more on par with silicate terrains and lower than nearby carbonate watersheds. Isotopic composition of carbon (delta C-13) and isotopic composition of nitrogen (delta N-15) values of river sediment reflect soil and temperate plant (C3 plant) values, while higher delta N-15 values could be attributed to application of organic fertilizers in lower reaches. The river sediments, which came from weathering of crystalline rocks, are dominated by silt size, geochemically less mature quartz, feldspar and muscovite particles. All the stream sediments examined revealed slightly increased amounts of Zn, Cu and Pb. However, using Al as the normalization element to calculate enrichment factors, Zn, Cu and Pb are only elevated downstream, related to industrial contamination. This study is important for local and global level since it deals with contribution of weathering rates and contribution of CO2 to the atmosphere in silicate watershed.
ER -
KANDUČ, Tjaša, Milan GERŠL, Eva GERŠLOVÁ and Jennifer MCINTOSH. Temporal and Seasonal Variations of Silicate Svratka River and Sediment Characterization, Czech Republic: Geochemical and Stable Isotopic Approach. \textit{Aquatic Geochemistry}. Springer, 2023, vol.~29, No~3, p.~145-171. ISSN~1380-6165. Available from: https://dx.doi.org/10.1007/s10498-023-09414-3.
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