NLOAD : an interactive, web-based modeling tool for nitrogen management in estuaries


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dc.contributor.author Bowen, Jennifer L.
dc.contributor.author Ramstack, Joy M.
dc.contributor.author Mazzilli, S.
dc.contributor.author Valiela, Ivan
dc.date.accessioned 2011-07-14T13:24:30Z
dc.date.available 2011-07-14T13:24:30Z
dc.date.issued 2007-07
dc.identifier.citation Ecological Applications 17, Supple. (2007): S17–S30 en_US
dc.identifier.uri http://hdl.handle.net/1912/4679
dc.description Author Posting. © Ecological Society of America, 2007. This article is posted here by permission of Ecological Society of America for personal use, not for redistribution. The definitive version was published in Ecological Applications 17, Supple. (2007): S17–S30, doi:10.1890/05-1460.1. en_US
dc.description.abstract Eutrophication of estuaries is an increasing global concern that requires development of new tools to identify causes, quantify conditions, and propose management options that address this environmental problem. Since eutrophication is often associated with increased inputs of land-derived nitrogen to estuaries, we developed NLOAD, a user-friendly, web-based tool that brings together six different published models that predict nitrogen loading to estuaries and two models that estimate nitrogen concentrations in coastal waters. Here we describe each of the models, demonstrate how NLOAD is designed to function, and then use the models in NLOAD to predict nitrogen loads to Barnegat Bay, New Jersey (USA). The four models that we used to estimate nitrogen loads to Barnegat Bay, when adjusted, all had similar results that matched well with measured values and indicated that Barnegat Bay receives roughly 26 kg N·ha−1·yr−1. Atmospheric deposition was the dominant source of nitrogen to Barnegat Bay, followed by fertilizer nitrogen. Wastewater in Barnegat Bay is diverted to an offshore outfall and contributes no nitrogen to the system. The NLOAD tool has an additional feature that allows managers to assess the effectiveness of a variety of management options to reduce nitrogen loads. We demonstrate this feature of NLOAD through simulations in which fertilizer inputs to the Barnegat Bay watershed are reduced. Even modest cutbacks in the use of fertilizers on agricultural fields and lawns can be shown to reduce the amount of N entering Barnegat Bay. en_US
dc.description.sponsorship Support for the NLOAD tool came from the Cooperative Institute for Coastal and Estuarine Environmental Technologies (CICEET, CICEET-UNH grants #02-610 and #04-833). Additional funding was received from Environmental Defense. en_US
dc.format.mimetype application/pdf
dc.language.iso en_US en_US
dc.publisher Ecological Society of America en_US
dc.relation.uri http://dx.doi.org/10.1890/05-1460.1
dc.subject Barnegat Bay en_US
dc.subject Coastal planning en_US
dc.subject Eutrophication en_US
dc.subject Management tool en_US
dc.subject Nitrogen loading en_US
dc.subject Nitrogen mitigation en_US
dc.subject Resource managers en_US
dc.subject Watershed–estuary coupling en_US
dc.title NLOAD : an interactive, web-based modeling tool for nitrogen management in estuaries en_US
dc.type Article en_US
dc.identifier.doi 10.1890/05-1460.1

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