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Restoration of River Skjern Denmark
A case study example of floodplain habitat change following the first drainage and straightening, and the later restoration of a river in western Denmark. The River Skjern was channelised in 1968 and in 1999-2003 the river was restaurated. The orthophoto mosaics shows the situation before the restauration (1992) and after (2018).
Total area-specific nitrogen and phosphorus load (before retention) by sources and nitrogen surplus in large river catchments using the Moneris model.
Sorted by increasing nitrogen surplus
Total number of measurements on the status and quality of Europe's rivers, lakes and groundwater bodies as reported by countries to the EEA over the period 1965–2008
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Trend in annual water temperature in the Rhine (1909-2006), the Danube (1901-1990) and average water temperatures in August in Lake Saimaa, Finland (1924-2000)
Trend in median total ammonium, total phosphorus and nitrate concentration of river water bodies, grouped by ecological status/potential class
Concentrations are expressed as a median of annual mean concentrations. Up to three-year gaps of missing values have been interpolated or extrapolated. Only complete series with no missing values after this interpolation/extrapolation are included. The number of time series/river stations is shown in parentheses. The trend for 1992 to 2010 for each of the ecological quality classes has been linearly extended to 2027 — or when the concentration level becomes negative.
Biochemical Oxygen Demand (BOD5) and total ammonium concentrations in rivers between 1992 and 2007
Numbers of river monitoring stations in brackets
Trends in concentration of cadmium and mercury at river stations included in the EU Exchange of Information Decision
In less polluted areas in, for example, Nordic countries, concentrations of cadmium and mercury are only 10 and 1 % of these values
Water temperatures in four selected European rivers and lakes in the 20th century
Annual average water temperature in River Rhine (1909-2006), River Danube (1901-1998), Lake Võrtsjärv (1947-2006), and average water temperature in August in Lake Saimaa, Finland (1924-2000).
Waterbase - River and lake monitoring stations
Waterbase - map of river and lake monitoring stations
WISE Large rivers and large lakes
In order to have a visually uninterrupted hydrographic network WISE Large rivers and large lakes should be used in combination with Transitional waters that resides along with the River basin district data.
WISE River basin districts (RBDs)
Top: The geographic area of some RBDs span more than one country (such as the Danube) and these are known as International RBDs
Biochemical Oxygen Demand (BOD5) and total ammonium concentrations in rivers between 1992 and 2010
Concentrations are expressed as annual mean concentrations. Only complete series after inter/extrapolation are included (see indicator specification). The number of river monitoring stations included per country is given in metadata (see downloads and more info). BOD7 data has been recalculated into BOD5 data.
BOD5 concentrations in rivers between 1992 and 2010 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. BOD7 data has been recalculated into BOD5 data.
BOD5 concentrations in rivers between 1992 and 2010 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. There were no stations with consistent data series on BOD7 in rivers draining to the Arctic Ocean. BOD7 data has been recalculated into BOD5 data.
Total ammonium concentrations in rivers between 1992 and 2010 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.
Total ammonium concentrations in rivers between 1992 and 2010 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.
Natural (1909–1948) and recent (1949–2007) flows for the River Vojmån, and flow according to the plans for diverting water from its catchment
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Nitrate concentrations in rivers
Nitrate in European rivers, 1994-96
Number of days with water temperature higher than 23 oC in the river Rhine (Lobith, the Netherlands) 1909-2003
Number of days with water temperature higher than 23 oC in the river Rhine (Lobith, the Netherlands) 1909-2003
Number of salmon returning to the rivers in England, France and Scotland since the 1970s
England: River Thames
Organic matter in European rivers 1994-96
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Percentage of natural, heavily modified, artificial and unknown status for river, lake, transitional and coastal water bodies
The graphs illustrate the designation of heavily and artificial water bodies
Percentage of natural, heavily modified, artificial and unknown status for river, lake, transitional and coastal water bodies
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Percentage of river monitoring stations per country reporting increasing (upward) or decreasing (downward) trends in nitrate concentrations (1992 to 2004)
Negative values on 'y' axis equate to decreasing trends, positive values increasing trends