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Inland subsurface water system role for coastal nitrogen load dynamics and abatement responses
Stockholm University, Faculty of Science, Department of Physical Geography and Quaternary Geology. (Mark- och vattenresurser/Hydrologi)
Stockholm University, Faculty of Science, Department of Physical Geography and Quaternary Geology. (Mark- och vattenresurser/Hydrologi)
2007 (English)In: Environmental Science & Technology, Vol. 41, no 7, 2159-2164 p.Article in journal (Refereed) Published
Abstract [en]

We simulate and analyze long-term dynamics of coastal

nitrogen (N) loading and the inland source changes and

processes that may have determined its development over

the past 60-year period and may govern its possible

future responses to variousNsource management scenarios.

With regard to processes, the results show that average

basin-scale N delivery fractions to the coast may not be

representative of the coastal impacts of either diffuse or

point inland sources. The effects of inland source changes

may be greatly redistributed in space-time and delayed

by slow N transport and mass transfer processes in the

subsurface water system of coastal catchments. Extrapolation

of current N transport-attenuation conditions

for quantification of future abatement effects may therefore

be misleading if the extrapolation models do not realistically

represent delayed long-term influences of slow subsurface

processes. With regard to policy, the results show that and

why national Swedish and international Baltic Sea

region policies for coastal N load abatement may be

difficult or impossible to achieve by inland source abatement

only. Large mitigation of both point and diffuse sources

may be necessary to achieve targeted coastal N load

reductions fast and maintain them also in the long term.

Place, publisher, year, edition, pages
2007. Vol. 41, no 7, 2159-2164 p.
Keyword [en]
Groundwater/surface water interaction, Nutrients and nutrient cycling, Modeling, Water quality, Catchment
National Category
Oceanography, Hydrology, Water Resources Geochemistry Physical Geography Oceanography, Hydrology, Water Resources
Identifiers
URN: urn:nbn:se:su:diva-22060DOI: doi:10.1021/es062535jOAI: oai:DiVA.org:su-22060DiVA: diva2:188587
Note
One-sentence synopsis: We simulate long-term dynamics of nitrogen (N) loading from land to sea and show that the effects of inland source abatement on coastal N loading may be greatly delayed by slow subsurface N transport and mass transfer processes.Available from: 2007-05-15 Created: 2007-05-15 Last updated: 2011-01-11Bibliographically approved

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Department of Physical Geography and Quaternary Geology
Oceanography, Hydrology, Water ResourcesGeochemistryPhysical GeographyOceanography, Hydrology, Water Resources

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