Water pollution eutrophication

Water pollution Deposited material or percolate escapes either by surface run-off or by underground movement, threatening streams, rivers, aquifers or the sea Direct poisoning or eutrophication... 

Cultural Eutrophication accelerated aging of water body due to human influence and water pollution... 

In Europe, eutrophication is one of the main water pollution problems, which originates partially from the past European common agricultural policy. The intensive cultivation of land demanded the use of large amounts of fertilizers in a relatively small total land area. Although the situation has improved in the last few years with the phosphorus levels in water being decreased, the presence of nitrates in the aquatic environment is still a problem. 

The situation is more complex in the region of Asia and the Pacific. Water quality has many enemies there. First, sedimentation constitutes a major cause of pollution in Asian rivers, since sediment loads are four times the world average. Secondly, hazardous and toxic waste deteriorates the water quality. It is noteworthy that lead levels in Asia s surface water are about 20 times higher than those in OECD countries. Thirdly, eutrophication is faced due to the extensive use of fertilizers in the last 30 years. But the list of problems does not end here. Asian rivers contain three times as many bacteria from human waste as the world average. Finally, urbanization and the release of untreated sewage and industrial waste to the environment are expected to cause severe water pollution problems. 

Lancelot, C. (1990) Phaeocystis blooms in die continental coastal area of die Channel and die North Sea, in Eutrophication and algal blooms in North Sea coastal zones, the Baltic and adjacent areas prediction and assessment of preventive actions (eds C. Lancelot, G. Billen and H. Barth) Commission of die European Communities, Brussels, Water Pollution Research Report, 12, pp. 27—54. 

In the Philippines, water pollution in Metro Manila is caused by increased domestic and industrial discharges. Many urban areas lack an efficient sewage system and only 12% of Metro Manila s population are served by a sewage treatment system. As a results, the Laguna de Bay is already in a hyper-eutrophic state owing to pollution loads from domestic and industrial waste (ESCAP, 1995). 

But the health of world s oceans has already been seriously compromised and is rapidly deteriorating. Gradual acidification of oceans from burning of fossil fuel on land, climate change-driven increase in the average water temperatures, eutrophication in areas where nutritive pollutants contaminate the waters, and drastic changes... 

Many t q>es of water pollution are associated with the agricultural industry. For example, the excessive use of fertilizers, which contain nitrate and phosphate compounds, have caused a dramatic increase in the growth of algae and plants in lakes and streams. This increased growth may interfere with the normal cycles that occur in these aquatic systems, causing them to age prematurely — a process known as eutrophication. 

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