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Indicator Assessment Oxygen consuming substances in rivers (CSI 019/WAT 002) - Assessment DRAFT created Sep 2014
Concentrations of BOD and total ammonium have decreased in European rivers in the period 1992 to 2012 (Fig. 1), mainly due to general improvement in waste water treatment.
Located in Data and maps Indicators Oxygen consuming substances in rivers
Figure Trends per station in dissolved inorganic nitrogen (DIN) concentrations in European seas
Stations showing a statistically significant decrease (green), increase (red) or no trend (grey) of winter dissolved inorganic nitrogen (DIN) concentrations within the period 1985-2012. Selected stations must have at least data in the period 2007-2012 and at least 5 years data in all.
Located in Data and maps Maps and graphs
Daviz Visualization D source code Rivers - European trend
Located in Data and maps Data visualisations
Daviz Visualization Ammonium concentrations in rivers in different sea regions of Europe.
Located in Data and maps Data visualisations
Daviz Visualization Ammonium concentrations in rivers in different geographical regions of Europe.
Located in Data and maps Data visualisations
Daviz Visualization Rivers - ammonium
Located in Data and maps Data visualisations
GIS Map Application WISE SoE Ammonium in Rivers
The map shows the mean annual concentrations of total ammonium (TA) as mg/L N-NH4in European rivers measured at WISE SoE River monitoring stations from 1992 till 2011. All data are annual means. For most countries these are based on measurements over the whole year, but for some countries the annual mean actually represents only 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 total ammonium/ammonium in rivers across Europe and to enable viewer to make comparisons of the values in European countries or individual monitoring sites. NH4 is the empirical formula of the ammonium ion which, in water, is an important nitrogenous fertilizer for aquatic plants. In excess ammonium can give rise to problems because it contributes indirectly to BOD by reducing Dissolved Oxygen concentrations in water. It also forms ammonium hydroxide in water and is extremely toxic to fish and aquatic life at elevated pH levels.Total ammonium concentrations are normally increased as a result of discharges from waste water treatment plants, industrial effluents and agricultural runoff. It exerts a demand on oxygen in water as it is transformed to oxidised forms of nitrogen. In addition it is toxic to aquatic life at certain concentrations in relation to water temperature, salinity and pH. It can also pollute water used for drinking and bathing. In less detailed scale data is aggregated by country and pie charts are displayed. In more detailed scale individual stations appear in shape of triangles. Historical data (from 1992 on) can be displayed and viewed with time slider tool.
Located in Data and maps Interactive maps
GIS Map Application Ammonium in groundwater by countries and WFD gw bodies Mean annual concentrations of Ammonium (NH4) measured at WISE SoE groundwater
The map shows the mean annual concentrations of Ammonium (NH4) measured at WISE SoE groundwater monitoring stations during the period 2000 – 2011. All data are annual means aggregated by countries (visible when the map is zoomed to the scale of 1 : 6 000 001 and less detailed) or by WFD groundwater bodies (visible when the map is zoomed to the scale of 1 : 6 000 000 and more detailed).
Located in Data and maps Interactive maps
Figure Total ammonium concentrations in rivers between 1992 and 2011 in different geographical regions of Europe
The data series per region are calculated as the average of the annual mean 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. If data on total ammonium are not available, data on ammonium are included into the data series.
Located in Data and maps Maps and graphs
Figure Total ammonium concentrations in rivers between 1992 and 2011 draining to 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 included per sea region is given in parentheses. If data on total ammonium are not available, data on ammonium are included into the data series.
Located in Data and maps Maps and graphs
European Environment Agency (EEA)
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Denmark
Phone: +45 3336 7100