Modelling nutrient fluxes into the Mediterranean Sea
Study region: Mediterranean River Basins. Study focus: Human activities and consequent pollution have put the freshwater and marine ecosystems of the Mediterranean region under pressure, with high risk of eutrophication phenomena. In this study, an extended version of the Geospatial Regression Equat...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2019-04-01
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| Series: | Journal of Hydrology: Regional Studies |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S221458181830226X |
| _version_ | 1828843520249561088 |
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| author | Anna Malagó Fayçal Bouraoui Bruna Grizzetti Ad De Roo |
| author_facet | Anna Malagó Fayçal Bouraoui Bruna Grizzetti Ad De Roo |
| author_sort | Anna Malagó |
| collection | DOAJ |
| description | Study region: Mediterranean River Basins. Study focus: Human activities and consequent pollution have put the freshwater and marine ecosystems of the Mediterranean region under pressure, with high risk of eutrophication phenomena. In this study, an extended version of the Geospatial Regression Equation for European Nutrient losses model (GREEN), originally developed for estimating nutrient loads from diffuse and point sources in Europe, was extended to include additional nutrient sources using a grid cell discretization. The spatial resolution is 5 arc minute and the model inputs consist of the latest and best available global data. New hydrological insights for the region: The results of this study show that during 2003–2007 (baseline), 1.87 Tg/y of total nitrogen (TN), 1.22 Tg/y of nitrates (N-NO3), 0.11 Tg/y of total phosphorus (TP) and 0.03 Tg/y of orthophosphate (P-PO4) were discharged in the Mediterranean Sea. The source apportionment analysis showed that the main contributor to total nitrogen and nitrate loads is agriculture followed by natural background, while for orthophosphate dominant sources include wastewater and scattered dwellings. Two scenarios were investigated to assess sustainable water and nutrient management options, showing that the reduction of 50% of nitrogen surplus leads to a significant reduction of nitrogen emission in regions characterized by high intensity agriculture, while the upgrading of wastewater treatment plants to tertiary level was more efficient for TP reduction. Keywords: Nutrients, Modelling, Mediterranean Sea, Diffuse and point sources, Source apportionment |
| first_indexed | 2024-12-12T20:46:56Z |
| format | Article |
| id | doaj.art-79923e59f24b46ed9a6089ef25a32b01 |
| institution | Directory Open Access Journal |
| issn | 2214-5818 |
| language | English |
| last_indexed | 2024-12-12T20:46:56Z |
| publishDate | 2019-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Hydrology: Regional Studies |
| spelling | doaj.art-79923e59f24b46ed9a6089ef25a32b012022-12-22T00:12:32ZengElsevierJournal of Hydrology: Regional Studies2214-58182019-04-0122Modelling nutrient fluxes into the Mediterranean SeaAnna Malagó0Fayçal Bouraoui1Bruna Grizzetti2Ad De Roo3Corresponding author.; European Commission, Joint Research Centre (JRC), Ispra, ItalyEuropean Commission, Joint Research Centre (JRC), Ispra, ItalyEuropean Commission, Joint Research Centre (JRC), Ispra, ItalyEuropean Commission, Joint Research Centre (JRC), Ispra, ItalyStudy region: Mediterranean River Basins. Study focus: Human activities and consequent pollution have put the freshwater and marine ecosystems of the Mediterranean region under pressure, with high risk of eutrophication phenomena. In this study, an extended version of the Geospatial Regression Equation for European Nutrient losses model (GREEN), originally developed for estimating nutrient loads from diffuse and point sources in Europe, was extended to include additional nutrient sources using a grid cell discretization. The spatial resolution is 5 arc minute and the model inputs consist of the latest and best available global data. New hydrological insights for the region: The results of this study show that during 2003–2007 (baseline), 1.87 Tg/y of total nitrogen (TN), 1.22 Tg/y of nitrates (N-NO3), 0.11 Tg/y of total phosphorus (TP) and 0.03 Tg/y of orthophosphate (P-PO4) were discharged in the Mediterranean Sea. The source apportionment analysis showed that the main contributor to total nitrogen and nitrate loads is agriculture followed by natural background, while for orthophosphate dominant sources include wastewater and scattered dwellings. Two scenarios were investigated to assess sustainable water and nutrient management options, showing that the reduction of 50% of nitrogen surplus leads to a significant reduction of nitrogen emission in regions characterized by high intensity agriculture, while the upgrading of wastewater treatment plants to tertiary level was more efficient for TP reduction. Keywords: Nutrients, Modelling, Mediterranean Sea, Diffuse and point sources, Source apportionmenthttp://www.sciencedirect.com/science/article/pii/S221458181830226X |
| spellingShingle | Anna Malagó Fayçal Bouraoui Bruna Grizzetti Ad De Roo Modelling nutrient fluxes into the Mediterranean Sea Journal of Hydrology: Regional Studies |
| title | Modelling nutrient fluxes into the Mediterranean Sea |
| title_full | Modelling nutrient fluxes into the Mediterranean Sea |
| title_fullStr | Modelling nutrient fluxes into the Mediterranean Sea |
| title_full_unstemmed | Modelling nutrient fluxes into the Mediterranean Sea |
| title_short | Modelling nutrient fluxes into the Mediterranean Sea |
| title_sort | modelling nutrient fluxes into the mediterranean sea |
| url | http://www.sciencedirect.com/science/article/pii/S221458181830226X |
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