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A standardised method for measuring in situ denitrification in shallow aquifers: numerical validation and measurements in riparian wetlands

Sanchez-Pérez, José-Miguel and Bouey, C. and Sauvage, Sabine and Teissier, Samuel and Antigüedad, Iñaki and Vervier, Philippe A standardised method for measuring in situ denitrification in shallow aquifers: numerical validation and measurements in riparian wetlands. (2003) Hydrology and Earth System Sciences, vol. 7 (n° 1). pp. 87-96. ISSN 1027-5606

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Official URL: http://dx.doi.org/10.5194/hess-7-87-2003

Abstract

A tracer test to examine in situ denitrification in shallow groundwater by a piezometer with a packer system used bromide as a tracer of dilution and acetylene (10%) to block the denitrification process at the nitrous oxide stage. During the test, dissolved oxygen, nitrate (NO3-), bromide (Br-), nitrous oxide (N2O) and dissolved organic carbon (DOC) were measured. To calibrate the experimental method, comparison with numerical simulations of the groundwater transfer were carried out, taking into account the environmental characteristics. The method was tested by measurements undertaken in different environmental conditions (geology, land use and hydrology) in two riparian wetlands. Denitrification rates measured by this method ranged from 5.7 10-6 g N-NO3-L-1 h-1 to 1.97 10-3 g N-NO3-L-1 h-1 The method is applicable in shallow aquifers with a permeability from 10-2 to 10-4m s-1.

Item Type:Article
Additional Information:Thanks to European Geosciences Union (EGU) editor. The definitive version is available at http://www.hydrology-and-earth-system-sciences.net/index.html The original PDF of the article can be found at Hydrology and Earth System Sciences website : http://www.hydrol-earth-syst-sci.net/7/87/2003/hess-7-87-2003.html
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
Other partners > Universidad del País Vasco - Euskal Herriko Unibertsitatea (SPAIN)
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Deposited By:Florence Amor

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