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Režimi iznosov nitratnega dušika (NO3-N) na podlagi meritev s kratkim časovnim korakom na porečju vodotoka Kuzlovec = Nitrate nitrogen (NO3-N) export regimes based on high-frequency measurements in the Kuzlovec stream catchmentLebar, Klaudija ...V prispevku je predstavljena določitev režimov iznosa nitratnega dušika (NO3-N) s porečja vodotoka Kuzlovec med padavinskimi dogodki z različnimi metodami: razmerjem koeficientov variacije ... koncentracije NO3-N in pretoka (CVC/CVQ), naklonom premice skozi točke logaritmov pretoka in koncentracij (b), obeh omenjenih kazalnikov hkrati ter relativne spremembe koncentracije NO3-N med dogodkom (Crs). Količine NO3-N med padavinskimi dogodki namreč po predhodnih ocenah predstavljajo kar 30 % celotne iznesene količine NO3-N s porečja, časovno pa padavinski dogodki predstavljajo zgolj 10 % časa. Režime smo opredelili kot kemostatične (koncentracija se s pretokom ne spreminja) in kemodinamične (koncentracija se s pretokom spreminja), slednje pa dodatno še na režim spiranja in redčenja. V analizo je bilo vključenih 43 padavinskih dogodkov iz obdobja april 2018%april 2020, za katere smo razpolagali z 20-minutnimi podatki meritev koncentracije in pretoka. Vsi kazalniki so pokazali, da se porečje z vidika iznosa NO3-N glede na spremembo pretoka različno odzove in da je pretežen kemodinamični odziv s pogostejšo prisotnostjo spiranja. Morebitno povezanost raznolikosti režimov z obdobjem leta smo preverili z neparametričnim statističnim Wilcoxonovim testom. Za nobenega od kazalnikov nismo ugotovili statistično značilne razlike med sezonama, smo pa s podrobnejšo analizo kazalnika CVC/CVQ ugotovili, da je zelo verjetno povezan s sezonsko spremenljivostjo lastnosti padavin in posledično hidroloških razmer. V prihodnje bi bilo zato smiselno v raziskavo dodatno vključiti tudi spremenljivke, s katerimi opišemo lastnosti padavin in hidroloških razmer na porečju.Source: Acta hydrotechnica. - ISSN 0352-3551 (34, [št.] 60, 2021, str. 25-38)Type of material - article, component partPublish date - 2021Language - slovenianCOBISS.SI-ID - 62389507
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Lebar, Klaudija | 38531 |
Bezak, Nejc, hidrologija | 35409 |
Vidmar, Andrej, vodarstvo, 1961- | 10924 |
Rusjan, Simon | 24342 |
Source: Personal bibliographies
and: SICRIS
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