Hydrogeochemical and isotopic characterization of Pesnica River, Slovenia
The surface water geochemistry and carbon cycling studied here depend mainly on geological composition of the river catchment. The investigated surface waters in the river Pesnica catchment that are heavily hydromorphologicaly altered (reservoirs, channelization, land melioration systems) represen...
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doaj-26b18291bae0483595999f73e7ab68442021-07-02T08:09:55ZengGeological Survey of SloveniaGeologija0016-77891854-620X2016-12-0159217919210.5474/geologija.2016.010Hydrogeochemical and isotopic characterization of Pesnica River, Slovenia Tjaša KandučZoran SamardžijaNataša MoriAndreja JerebicInes LevačičMiha KračunJohanna A. RobinsonStojan ŽigonŽeljko BlažekaDavid KocmanThe surface water geochemistry and carbon cycling studied here depend mainly on geological composition of the river catchment. The investigated surface waters in the river Pesnica catchment that are heavily hydromorphologicaly altered (reservoirs, channelization, land melioration systems) represent waters inflenced by chemical weathering of carbonates and of mostly clastic rocks (claystone, sandstones, marlstones and siltstones). The objectives of our study were to analyze hydrogeochemical and isotopic composition of dissolved (δ13CDIC) and particulate carbon (δ13CPOC) with characterization of suspended matter and evaluate biogeochemical processes in Pesnica River in Slovenia before and after the retention. Surface waters are generally close to saturation regarding calcite and dolomite, dissolved CO2 is 49 to 1000 times oversaturated relative to atmosphere. δ13C DIC was in the range from -14.8 to -4.2 ‰ and shows following biogeochemical processes in river system: degradation of organic matter, dissolution of carbonates and biological activity, which was confimed with SEM microscopy and EDXS microanalysis. Results of SEM/EDXS showed that suspended matter is composed of K, Mg and Ca from locations Pesnica 1 and Pesnica 2 (above retention Perniško lake). Sample from Pesnica 3 (below retention) shows higher biological activity, while sample from Pesnica 4 (tributary of Pesnica, drainage channel Biš) contains a lot of particles of microporous structure and fier structure, which are probably of anthropogenic origin. δ13CPOC is changing from -29.5 to-27.6‰ and showed different stages of degraded terrestrial material. More negative δ13CPOC are shown at location at drainage channel Biš and show higher terrestrial input in river system as locations 1, 2 and 3 Pesnica, which have higher δ13CPOC values. This fist results about suspended matter in Pesnica watershed serve for evaluation of anthropogenic inflences specially in relation with further inflences and longer time planning of sustainable river water management.http://www.geologija-revija.si/dokument.aspx?id=1281River Pesnicahydrogeochemical compositionstable isotopescarbonbiogeochemical processes |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Tjaša Kanduč Zoran Samardžija Nataša Mori Andreja Jerebic Ines Levačič Miha Kračun Johanna A. Robinson Stojan Žigon Željko Blažeka David Kocman |
spellingShingle |
Tjaša Kanduč Zoran Samardžija Nataša Mori Andreja Jerebic Ines Levačič Miha Kračun Johanna A. Robinson Stojan Žigon Željko Blažeka David Kocman Hydrogeochemical and isotopic characterization of Pesnica River, Slovenia Geologija River Pesnica hydrogeochemical composition stable isotopes carbon biogeochemical processes |
author_facet |
Tjaša Kanduč Zoran Samardžija Nataša Mori Andreja Jerebic Ines Levačič Miha Kračun Johanna A. Robinson Stojan Žigon Željko Blažeka David Kocman |
author_sort |
Tjaša Kanduč |
title |
Hydrogeochemical and isotopic characterization of Pesnica River, Slovenia |
title_short |
Hydrogeochemical and isotopic characterization of Pesnica River, Slovenia |
title_full |
Hydrogeochemical and isotopic characterization of Pesnica River, Slovenia |
title_fullStr |
Hydrogeochemical and isotopic characterization of Pesnica River, Slovenia |
title_full_unstemmed |
Hydrogeochemical and isotopic characterization of Pesnica River, Slovenia |
title_sort |
hydrogeochemical and isotopic characterization of pesnica river, slovenia |
publisher |
Geological Survey of Slovenia |
series |
Geologija |
issn |
0016-7789 1854-620X |
publishDate |
2016-12-01 |
description |
The surface water geochemistry and carbon cycling studied here depend mainly on geological composition
of the river catchment. The investigated surface waters in the river Pesnica catchment that are heavily
hydromorphologicaly altered (reservoirs, channelization, land melioration systems) represent waters inflenced
by chemical weathering of carbonates and of mostly clastic rocks (claystone, sandstones, marlstones and
siltstones). The objectives of our study were to analyze hydrogeochemical and isotopic composition of dissolved
(δ13CDIC) and particulate carbon (δ13CPOC) with characterization of suspended matter and evaluate biogeochemical
processes in Pesnica River in Slovenia before and after the retention. Surface waters are generally close to
saturation regarding calcite and dolomite, dissolved CO2 is 49 to 1000 times oversaturated relative to atmosphere.
δ13C
DIC was in the range from -14.8 to -4.2 ‰ and shows following biogeochemical processes in river system:
degradation of organic matter, dissolution of carbonates and biological activity, which was confimed with SEM
microscopy and EDXS microanalysis. Results of SEM/EDXS showed that suspended matter is composed of K,
Mg and Ca from locations Pesnica 1 and Pesnica 2 (above retention Perniško lake). Sample from Pesnica 3 (below
retention) shows higher biological activity, while sample from Pesnica 4 (tributary of Pesnica, drainage channel
Biš) contains a lot of particles of microporous structure and fier structure, which are probably of anthropogenic
origin. δ13CPOC is changing from -29.5 to-27.6‰ and showed different stages of degraded terrestrial material.
More negative δ13CPOC are shown at location at drainage channel Biš and show higher terrestrial input in river
system as locations 1, 2 and 3 Pesnica, which have higher δ13CPOC values. This fist results about suspended
matter in Pesnica watershed serve for evaluation of anthropogenic inflences specially in relation with further
inflences and longer time planning of sustainable river water management. |
topic |
River Pesnica hydrogeochemical composition stable isotopes carbon biogeochemical processes |
url |
http://www.geologija-revija.si/dokument.aspx?id=1281 |
work_keys_str_mv |
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1721334971025588224 |