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Spremljanje dinamike vnosa in spiranja nitratnega dušika na porečju potoka Padež
ID Česnik, Katarina (Author), ID Rusjan, Simon (Author)

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Abstract
Občutljivost ekosistemov na spremembe količin dušika v okolju je velika. V želji, da jih zaščitimo pred preobremenjenostjo s hranili in jim omogočimo zdrav razvoj, je poznavanje masne bilance dušika ključnega pomena. Spremembe v količini dušika se, poleg naraščajočih antropogenih vnosov dušikovih spojin v okolje, pojavijo zaradi delovanja meteoroloških, hidroloških, geoloških in bioloških dejavnikov oziroma biogeokemijskega kroženja med biotopom in biocenozo. S pomočjo podatkov o koncentracijah nitratnega dušika v vodotoku in padavinah ter podatkov o količini padavin in odtoku s prispevnega območja potoka Padež smo analizirali mesečno dinamiko vnosa in spiranja nitratnega dušika, ki je podana kot razlika med količino vnesenega in spranega nitratnega dušika na hektar prispevne površine. V časovni dinamiki je opazen sezonski vpliv. Porečje nekaj časa deluje kot izvor in nekaj časa kot ponor nitratnega dušika, odvisno od hidroloških razmer in potencialne količine mobilnega nitratnega dušika v sistemu tal, ki se nadalje spira v vodotok, ter njegove koncentracije v padavinah.

Language:Slovenian
Keywords:nitratni dušik, biogeokemija, hidrološke razmere, porečje Padeža
Work type:Not categorized (r6)
Typology:1.01 - Original Scientific Article
Organization:FGG - Faculty of Civil and Geodetic Engineering
Year:2014
Publisher:Univerza v Ljubljani, Fakulteta za gradbeništvo in geodezijo
Number of pages:Str. 73-84
Numbering:Letn. 27, št. 47
UDC:550.47:556.51(497.4)
ISSN on article:1581-0267
COBISS.SI-ID:7303009 This link opens in a new window
Publication date in RUL:14.06.2016
Views:1153
Downloads:607
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Record is a part of a journal

Title:Acta hydrotechnica
Shortened title:Acta hydrotech.
Publisher:Fakulteta za gradbeništvo in geodezijo
ISSN:1581-0267
COBISS.SI-ID:1838689 This link opens in a new window

Secondary language

Language:English
Title:Tracing nitrate nitrogen input-output dynamics at the Padež stream watershed
Abstract:
The sensitivity of ecosystems to changes in the amounts of nitrogen in the environment is large. In order to protect them against overloads of nutrients and to allow their healthy development, the knowledge of the nitrogen mass balance is crucial. Differences in the amount of nitrogen occur because of increasing inputs from anthropogenic sources, but they are also due to meteorological, hydrological, geological and biological factors or, in other words, to biogeochemical circulation between the biotope and organisms. The data on stream water nitrate concentrations and nitrate concentrations in precipitation together with measurements of precipitations and Padež stream discharge were used to analyze nitrate-nitrogen input-output dynamics. The analysis is presented as a difference between inputs and outputs of nitrate-nitrogen per hectare of catchment area. The impact of seasonality could be observed. Watershed behaves as a sink or as a source of nitrate-nitrogen depending on the hydrological conditions and the amount of potentially available nitrate-nitrogen in soil which is flushed towards the stream and its concentrations in precipitation.

Keywords:nitrate nitrogen, biogeochemistry, hydrological conditions, Padež stream watershed

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