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Daviz Visualization Rivers - orthophosphate
Located in Data and maps Data visualisations
Indicator Assessment Nutrients in freshwater (CSI 020) - Assessment published Oct 2012
Average nitrate concentrations in European groundwaters increased from 1992 to 1998, but have declined again since 2004. The average nitrate concentration in European rivers decreased by approximately 11% between 1992 and 2010 (from 2.5 to 2.2 mg/l N), reflecting the effect of measures to reduce agricultural inputs of nitrate as well as improvement in wastewater treatment. Average orthophosphate concentrations in European rivers have decreased markedly over the last two decades, being more than halved between 1992 and 2010 (54% decrease). Also average lake phosphorus concentration decreased over the period 1992-2010 (by 31%), the major part of the decrease occurring in the beginning of the period, but is still ongoing. The decrease in phosphorus concentrations reflects both improvement in wastewater treatment and reduction in phosphorus in detergents. Overall, reductions in the levels of freshwater nutrients over the last two decades primarily reflect improvements in wastewater treatment. Emissions from agriculture continue to be a significant source.
Located in Data and maps Indicators Nutrients in freshwater
Figure Phosphorus concentrations in rivers (orthophosphate) between 1992 and 2010 in different sea regions of Europe
The sea region data series are calculated as the average of annual mean data from river monitoring stations in each sea region. The data thus represents rivers or river basins draining into that particular sea. Only complete series after inter/extrapolation are included (see indicator specification). The number of river monitoring stations per sea region is given in parentheses.
Located in Data and maps Maps and graphs
GIS Map Application WISE SoE: Orthophosphate in rivers
This map shows the mean annual concentrations of phosphate (orthophosphate, OP) as mg/L PO4-P measured at Eionet-Water River monitoring stations during 2011. All data are annual means. For most countries these are based on measurements over the whole year, whereas some countries have samples only from the growing season (due to ice cover in winter). The purpose of the map is to provide an overview of the annual concentrations of the orthophosphates in rivers across Europe and to enable viewer to make comparisons of the values in European countries, River basin districts or in individual monitoring sites. High or increased (compared to reference condition) concentration of Phosphate represents a risk to normal functioning of River ecosystems, causing eutrophication with potentially excessive growth of benthic algae or other aquatic vegetation, oxygen deficiency in the bottom substrate and reduced biodiversity.
Located in Data and maps Interactive maps
Figure Phosphorus concentrations in rivers (orthophosphate) between 1992 and 2011 in different geographical regions of Europe.
The data series per region are calculated as the average of the annual mean concentrations for river monitoring stations in the region. Only complete series after inter/extrapolation are included (see indicator specification). The number of river monitoring stations included per geographical region is given in parentheses
Located in Data and maps Maps and graphs
Daviz Visualization Average concentration of orthophosphate in European rivers
Located in Data and maps Data visualisations
Figure Observed changes in winter orthophosphate (PO4) concentrations, 1985–2010
The map shows stations with a statistically significant decrease (green), increase (red) or no trend (yellow) in winter ortophosphate concentrationswithin the period 1985-2010. Selected stations must have at least data in the period from 2007 to present and at least 5 years data in all.
Located in Data and maps Maps and graphs
Figure Annual average river orthophosphate concentration (mg/l as PO4-P) in 2008, by river basin district
The map shows the annual average river orthophosphate concentration by river basin district (mg/l as PO4-P) in 2008
Located in Data and maps Maps and graphs
Figure Annual average phosphorus concentration in rivers
Located in Data and maps Maps and graphs
Indicator Assessment Nutrients in freshwater (CSI 020) - Assessment published Dec 2010
Average nitrate concentrations in European groundwaters increased from 1992 to 1998, and have remained relatively constant since then. The average nitrate concentration in European rivers decreased by approximately 9 % between 1992 and 2008 (from 2.4 to 2.2 mg/l N), reflecting the effect of measures to reduce agricultural inputs of nitrate. Average orthophosphate concentrations in European rivers have decreased markedly over the last two decades, being almost halved between 1992 and 2008 (47 % decrease). Also average lake phosphorus concentration decreased over the period 1992-2008 (by 26%), the major part of the decrease occurring in the first half of the period. The decrease in phosphorus concentrations reflect both improvement in wastewater treatment and reduction in phosphorus in detergents. Overall, reductions in the levels of freshwater nutrients over the last two decades primarily reflect improvements in wastewater treatment. Emissions from agriculture continue to be a significant source.
Located in Data and maps Indicators Nutrients in freshwater
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