Graphics Library >> Vital Water Graphics >> Nitrate in major rivers

Nitrate in major rivers

Nitrate in major rivers

File type Download Size Language
.jpg .jpg Download 88 kb -
Uploaded 25 Feb 2012 by GRID-Arendal
Year: 2005
From collection: Vital Water Graphics
Author: Philippe Rekacewicz, UNEP/GRID-Arendal
Description:
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 statistically significant. European rivers showed the highest nitrate loads transported to the marine environment. Comparing data from the two decades, North American and European rivers have remained fairly stable, while major river basins in South Central and Southeast Asia have recorded higher nitrate concentrations. Nitrate is a major nutrient, and excess levels can cause eutrophication with symptoms such as decrease in oxygen levels, algal blooms and reduced biodiversity.
Downloads: 141     Rating: 3
  • Benefits from marine and coastal ecosystems and activities
  • Water consumption - top countries
  • Water withdrawal and consumption
  • carbon_cycle
  • Causes of sea level rise from climate change
  • Renewable freshwater supplies, per river basin
  • Regulation of the Tigris and Euphrates rivers
  • Phosphate levels in major basins