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The flux of dissolved nitrogen from the UK: evaluating the role of soils and land use

Worrall, Fred; Davies, Helen; Burt, Tim; Howden, Nicholas J.K.; Whelan, Mick J.; Bhogal, Anne; Lilly, Allan. 2012 The flux of dissolved nitrogen from the UK: evaluating the role of soils and land use. Science of the Total Environment, 434. 90-100. 10.1016/j.scitotenv.2012.01.035

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Abstract/Summary

Fluvial dissolved nitrogen (dissolved organic nitrogen [DON], nitrate and ammonium) fluxes from the terrestrial biosphere of the UK to surrounding oceans are explained on the basis of combined predictions of soil to water transfer and in-stream loss. The flux of different nitrogen species from land to surface waters is estimated using an export coefficient model employing catchment soil, land use and hydroclimatic characteristics, fitted to flux estimates derived from the Harmonised Monitoring Scheme between 2001 and 2007 for 169 UK catchments. In-stream losses of DON, nitrate and ammonium were estimated using a transit time filter in the fluvial network. Comparisons of modelled land to water N flux (2125 ktonnes N yr− 1) with estimates of N fluxes to estuarine and ocean systems at the tidal limit (791 ktonnes N yr− 1) suggest that significant in-channel N losses occur. These in transit losses are equivalent to up to 55 kg N ha− 1 yr− 1.

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1016/j.scitotenv.2012.01.035
Programmes: CEH Topics & Objectives 2009 - 2012 > Water > WA Topic 1 - Variability and Change in Water Systems > WA - 1.3 - Model, attribute and predict impacts of climate and land cover change on hydrological and freshwater systems
CEH Sections: Reynard
ISSN: 0048-9697
Additional Keywords: nitrogen, in-stream losses, budgets, land-use
NORA Subject Terms: Hydrology
Date made live: 04 Jan 2013 16:51 +0 (UTC)
URI: http://nora.nerc.ac.uk/id/eprint/20897

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