About: Dynamics of the nitrogen transformation in a shallow stream and possible interventions

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An Entity of Type : http://linked.opendata.cz/ontology/domain/vavai/Vysledek, within Data Space : linked.opendata.cz associated with source document(s)

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	The assessment of the efficiency of the main biological nitrogen transformation processes in a shallow river is presented. The process dynamics was studied with the help of mathematical modelling of on-line data measured in the Toess River, Switzerland. The algal nitrogen uptake was affected only by frequent floods. Daylight photosynthetic uptake stabilized at 6 mgN m-2streambed h-1 (15°C), dark uptake on storage products at 0.5-2.5 mgN m-2streambed h-1. Nitrogen uptake by heterotrophic bacteria in the hyporheic zone was at a level of 1.5-3.5 mgN m-2streambed h-1. Streambed nitrification could establish only during periods with averaged daily concentration of at least 0.3 gNH4-N m-3 for several weeks. The maximum nitrification rate was 35 mgN m-2streambed h-1 for 3 gNH4-N m-3. A river reach endangered by ammonium spills should be kept open to sun to favour ammonium uptake by algae. In-stream nitrification reduces ammonium peaks efficiently but leads to toxic nitrite concentrations. The assessment of the efficiency of the main biological nitrogen transformation processes in a shallow river is presented. The process dynamics was studied with the help of mathematical modelling of on-line data measured in the Toess River, Switzerland. The algal nitrogen uptake was affected only by frequent floods. Daylight photosynthetic uptake stabilized at 6 mgN m-2streambed h-1 (15°C), dark uptake on storage products at 0.5-2.5 mgN m-2streambed h-1. Nitrogen uptake by heterotrophic bacteria in the hyporheic zone was at a level of 1.5-3.5 mgN m-2streambed h-1. Streambed nitrification could establish only during periods with averaged daily concentration of at least 0.3 gNH4-N m-3 for several weeks. The maximum nitrification rate was 35 mgN m-2streambed h-1 for 3 gNH4-N m-3. A river reach endangered by ammonium spills should be kept open to sun to favour ammonium uptake by algae. In-stream nitrification reduces ammonium peaks efficiently but leads to toxic nitrite concentrations. (en)
Title	Dynamics of the nitrogen transformation in a shallow stream and possible interventions Dynamics of the nitrogen transformation in a shallow stream and possible interventions (en)
skos:prefLabel	Dynamics of the nitrogen transformation in a shallow stream and possible interventions Dynamics of the nitrogen transformation in a shallow stream and possible interventions (en)
skos:notation	RIV/68407700:21110/06:00129222!RIV13-MSM-21110___
http://linked.open...avai/riv/aktivita	V
http://linked.open...avai/riv/aktivity	V
http://linked.open...iv/cisloPeriodika	6-7
http://linked.open...vai/riv/dodaniDat	2013
http://linked.open...aciTvurceVysledku	Kabelková, Ivana
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	České vysoké učení technické v Praze / Fakulta stavební
http://linked.open...dnocenehoVysledku	472690
http://linked.open...ai/riv/idVysledku	RIV/68407700:21110/06:00129222
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	ammonium; biofilm; flood events; nitrification; nitrogen uptake (en)
http://linked.open.../riv/klicoveSlovo	nitrogen uptake flood events biofilm nitrification ammonium
http://linked.open...odStatuVydavatele	GB - Spojené království Velké Británie a Severního Irska
http://linked.open...ontrolniKodProRIV	[01B3AA175D9B]
http://linked.open...i/riv/nazevZdroje	Water Science & Technology
http://linked.open...in/vavai/riv/obor	JN
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	1 (xsd:int)
http://linked.open...UplatneniVysledku	2006
http://linked.open...v/svazekPeriodika	54
http://linked.open...iv/tvurceVysledku	Kabelková, Ivana
http://linked.open...ain/vavai/riv/wos	000242038900041
issn	0273-1223
number of pages	8 (xsd:int)
http://localhost/t...ganizacniJednotka	21110

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