A simple method for estimating nitrate removal from floodwaters in river marginal wetlands

Autor:	E. Maltby, C. J. Baker, E. C. Jewkes, N. Flynn, N. J. Mockler, P. J. Gardner
Rok vydání:	1998
Předmět:	Hydrology geography geography.geographical_feature_category Denitrification Flooding (psychology) Soil Science Wetland Pollution Denitrifying bacteria chemistry.chemical_compound Nitrate chemistry Environmental science Spatial variability Water pollution Agronomy and Crop Science Surface water
Zdroj:	Soil Use and Management. 14:90-95
ISSN:	1475-2743 0266-0032
DOI:	10.1111/j.1475-2743.1998.tb00621.x
Popis:	Soil cores from river marginal wetlands in the UK, France and Ireland, sampled and contained within PVC piping, were flooded with nitrate-N enriched water. Half of the cores were sterilized prior to flooding to destroy the denitrifying bacteria. The change in nitrate-N concentration in the floodwater was measured over time. It is argued that the observed nitrate depletion rates (from 0.4 to 2.3 kg/ha per day) may be identified With microbially-mediated denitrification. The results show the method to be a simple and direct procedure for the assessment of spatial variation in nitrate-sink capacity. The depth of the denitrifying layer at the soil-water interface was confirmed to be of the order of a few mm.
Databáze:	OpenAIRE
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