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Tag: Nitrate

Development of organic matter, phosphorus and nitrate in EU 15 rivers
The graphic shows the development of organic matter, phosphorus and nitrate in EU 15 rivers. Water resources in Europe have been profoundly influenced over the past century by human activities, including the construction...
14 Mar 2006 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Trends in groundwater nitrate concentrations
The graph shows the development of Nitrate concentration in groundwater from 1980 to 1995 in France, Britain and Denmark combined. Nitrate is a naturally occurring compound and is normal in small amounts, but excess amou...
14 Mar 2006 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Mean nutrient concentration in the coast of Romania
Illustration in a set of graphics prepared for a pilot assessment report on the Black Sea drainage basin, for the UNEP Global Impact on Waters Assessment (GIWA). All data and information were prepared in close collaborat...
10 Mar 2006 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Distribution of pollutant loads in the Black Sea
Illustration in a set of graphics prepared for a pilot assessment report on the Black Sea drainage basin, for the UNEP Global Impact on Waters Assessment (GIWA). All data and information were prepared in close collaborat...
01 Oct 2006 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Global fertilizer consumption
In recent years, there has been concern that the quantity of mineral fertilizers used in agriculture having adverse effects on the environment. Attention has been drawn to the fact that when nutrients are applied to crop...
28 Sep 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Nitrate in major rivers
Considering the data for all the rivers at the continental level, there has been little change in nitrate (NO3-N) concentrations between the two decades under comparison. Changes in the median value were not statisticall...
17 May 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Nitrate levels: concentrations at river mouths
Nutrients are essential to life. In aquatic systems, nitrogen and phosphorus are the two nutrients that most commonly control the growth of aquatic plants, algae and bacteria. Nitrogen and phosphorus are considered to be...
26 Jan 2009 - by Philippe Rekacewicz
When the city harms its own water resources
In areas where surface water is not readily available (located far from areas of need), groundwater is the primary water source. Groundwater aquifers supply an estimated 20% of the global population living in arid and se...
01 Oct 2009 - by Philippe Rekacewicz