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Pollutant attenuation at the groundwater – surface water interface : A classification scheme and statistical analysis using national-scale nitrate data.

Smith, J. W. N. and Surridge, Ben W. J. and Haxton, T. H. and Lerner, D. N. (2009) Pollutant attenuation at the groundwater – surface water interface : A classification scheme and statistical analysis using national-scale nitrate data. Journal of Hydrology, 369 (3-4). pp. 392-402.

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Abstract

A classification scheme for pollutant natural attenuation potential at the groundwater–surface water interface is presented, and its predictive power for explaining baseflow river nitrate concentration investigated. Both the classification scheme and statistical analysis are undertaken at Water Framework Directive surface water body scale for England and Wales, in baseflow conditions when relative groundwater contribution to rivers is greatest. The results of multiple regression analyses demonstrate statistically significant relationships between the classification of natural attenuation potential, its component properties, and baseflow river nitrate concentration. Natural attenuation at the groundwater–surface water interface is shown to be a significant control on observed river nitrate concentrations, albeit less influential than land-use descriptors. The results indicate that natural attenuation processes have a measurable impact on baseflow river chemistry at surface water body scale, and that consideration of natural attenuation processes at the groundwater–surface water interface would improve regional and catchment-scale risk prediction, and could help in the design of more sustainable catchment management strategies.

Item Type: Article
Journal or Publication Title: Journal of Hydrology
Uncontrolled Keywords: Groundwater–surface water interactions ; Natural attenuation ; Classification ; Sediment ; Nitrate
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
Departments: Faculty of Science and Technology > Lancaster Environment Centre
ID Code: 31455
Deposited By: Mr Richard Ingham
Deposited On: 18 Jan 2010 14:43
Refereed?: Yes
Published?: Published
Last Modified: 26 Jul 2012 16:58
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/31455

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