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From
all the previous discussions, we can conclude that eutrophication does more
harm than good. Therefore, eutrophication should be controlled before it is too
late, in order to ensure that there is a continuous supply of clean drinking
water and to maintain the continuation of aquatic species. Previously,
traditional eutrophication reduction strategies have been conducted but it has
been proven costly, unproductive and impractical for a large ecosystem.
Therefore, the main method to control eutrophication is by prevention.

            Prevention method can be carried out
by minimizing the impacts of nonpoint sources via practical agricultural
practises. If the forest cover is well protected, the amount of substances
preceding towards the water source can be reduced as they will be blocked by
certain disturbances. Also, by minimizing land degradation, the amount of soil
run-off and fertilizers containing nutrients, that reach the water source can
be reduced. Another good method to prevent eutrophication is known as the waste
disposal technology. Untreated domestic sewage is one of the main cause of
eutrophication. Thus, the domestic waste should be treated before it is
released into water sources by various treatment facilities. For example, a
tertiary treatment system should be introduced to reduce the concentration of
nutrients that reaches the water source.

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            Apart from that, shellfish organisms
such as oysters and mussels should also be restored to overcome the eutrophication
problems. Oyster reefs are good in eliminating nitrogen from water and it is
also efficient in filtering out toxins. This method is said to be efficient in
order to improve the water quality. This method has been used in Sweden, where
mussels were used to improve the quality of water.

            Another way suggested to control
eutrophication is by reducing the concentration of phosphate in detergents.
This is so that the phosphate does not mix with water  and thus, does not promote algae blooming.
Also, farmers should use the Soil Nitrogen Testing (N-Technique) that is
designed to help farmers estimate the amount of fertilizer the crops need. This
can be good for them as well as for the environment. By carrying out this test,
they can prevent from over-feeding their crops with fertilizers, which will
save their money and also save the environment as lesser amount of fertilizers
will then be released into the environment.

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