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Copy of Eutrophication

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by

Aatika Rawat

on 26 July 2013

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Transcript of Copy of Eutrophication

Background photo by t.shigesa
Eutrophication
People contribute by...
Use of detergents in laundry
Urban runoff washed and domestic waste on streets washed into sewers by storm water.
Run-Off of inorganic fertilisers and overuse of fertilisers.
If possible use natural fertilisers.
How do we address pollution at the level of human activity?
You can help! Yay!
support organic and local food industry use organic detergent
Attempt to minimize oil leaks from cars that could end up on the street and be carried to the water system
Organic fertilizers are being used (manure, worm casings, naturally occurring fertilizers) that increase the nutrient retention of soil without actually adding nutrients that can be carried to the water table, but they are expensive and if not properly administered can be a source of pathogens to plants
Through chemical processes such as denitrification, phosphates and nitrates are removed from water in treatment plants
CONSEQUENCES OF EUTROPHICATION
Water becomes unsuitable for drinking.
Disappearance of commercially important aquatic species.
Species diversity decreases.
Algae bloom limits light penetration which reduces growth.
Results in a shortage of oxygen and thus organisms die.
Can we clean up this pollution once it has been emitted?
Chesapeake Bay- one of the first identified dead zones- since 1967 the Chesapeake Bay Foundation has been attempting to restore the water quality, but the dead zone persists
Currently the EU is coordinating the Baltic Sea Strategy with eight EU member countries that border the Baltic Sea: Denmark, Estonia, Finland, Germany, Latvia, Lithuania, Poland, and Sweden. To attempt to control overfishing, political disputes, and pollution to improve the dead zones of the Baltic Sea
Regional disputes often obstruct policies
Of the 415 worldwide deadzones only 13 coastal systems in recovery (experiencing decreasing hypoxia)
The only effective method is curbing pollution runoff to stop the cycle of hypoxia
Mersey Estuary- UK, Boston Harbor, US- bothimproved water’s oxygen content but only achieved through pollution control
Run-off of manure and run-off from erosion also contribute to eutrophication.
It is important to note that all of the above contain either nitrates or phosphates.
EUTROPHICATION
HOW TO PREVENT
Use fertilisers responsibly
Ultrasonic irradiation has been considered as
a solution to algae bloom.
Limit the amount of nitrates
and phosphorous entering
water supplies

Eutrophication is a constantly increasing problem
which needs to be addressed.The only way this problem can be managed is through responsible usage of fertilizers.It is our responsibility as future pioneers to ensure sustainable and responsible use of the environment.
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