1. By Comenius team of 5th Lyceum of Veria,
Greece.
Comenius multilateral partnership 2011-2013
2. Eutrophication is the enrichment of an ecosystem
with chemical nutrients, typically compounds
containing nitrogen, phosphorus, or both.
3. The word derives from the greek
words “ευ”(eu- good) and “τροφή”
(trofi-food )
4. natural run-off of nutrients from the soil and
the weathering of rocks
run-off of inorganic fertilisers (containing
nitrates and phosphates)
run-off of manure from farms (containing
nitrates, phosphates and ammonia)
5. run-off from erosion (following mining,
construction work or poor land use)
discharge of detergents (containing
phosphates)
discharge of partially treated or untreated
sewage (containing nitrates and phosphates)
6.
7.
8. Ecological impact
The impact of eutrophication on biodiversity. The impact on animal biodiversity is
of concern. By lowering the ecological integrity of an ecosystem, only the more
tolerant animal species can survive.
Aesthetic impact
Eutrofication can cause unpleasant odours. This is often a problem in urban
areas where people live close to the affected water body. If the water is being used
for water treatment purposes, various taste and odour problems can occur. These
lower the perceived quality of the treated water, although do not cause human
health problems.
Human health impacts
People who are exposed to odours from waterways contaminated with decaying
algae of cyanobacteria may suffer chronic ill-health effects.
Economic impacts
the costs of water treatment areincreased in order to avoid
taste, odour and cyanotoxin problems in the treated water.
9. Eutrophication can be avoided by using minimal
required amounts of chemical fertilizers or better still
do away with them and use natural ones instead.
Be sure not to have the fields close to the water bodies.
Take extra care while using fertilizers during
monsoons as due to run-off, they get transmitted to the
water bodies. Then, they can cause blockage of
waterways, death of marine life and breakage of food
chain.
Make sure no run off from farms (nitrates etc) enter
the pond. Also factories shouldn't dump their waste
into the pond
