2. • Outbreak of Typhoid, Abdominal
infection, Cholera , death of
cattle in Rajarajeshwarinagar
• Residents are questioning
Breaking news on Jan 30 2014
authorities and governance
3. Analysts report says…
• Halagevaderahalli lake rejuvenation carried on
during Nov-12 to April 2013
• Sewage let into lake to fill it up
• High concentration of Nitrates and phosphates
found in ground water around area
• Root Cause found to be sewage water
percolation from the lake
4. Was it the right decision
to allow Sewage to mix
with rain water and let
into lake??
5. Definition of pollution
• Pollution of water is defined as
"contamination of water which makes it unfit
for use"
6. Sources of Pollution in Urban areas
• Waste materials like oils, chemicals released from automobiles,
household chemicals, etc. are the major pollutants from urban
areas. Chemical fertilizers and remains of pesticides form the
main pollutants that are drained by rain. This process is called
Eutrophication
• High Eutrophication means higher nutrient and less oxygen in
the lake which results in the death of many flora and fauna of
the lake
7. Nitrification
• Excess of Nitrates due to human faecal
pollution will make the water unfit for
drinking.
• Cattle die after few days because of high
nitrate which is converted to nitrite , leading
to kidney failure and eventual death in cattle
8. What is Our choice
• Do we need these problems in our lakes or
could we avoid them .
• The choice is very clear to us
• We want a clean lake even if the water comes
after a decade
10. Nitrate toxicity in cattle
• Forage Facts: Nitrate Toxicity in Cattle
• Nitrate poisoning in cattle is caused by the
consumption of an excessive amount of
nitrate or nitrite from grazing crops, hay,
silage, weeds, drinking water, lubricating oil,
fertilizer, etc. In addition, drought is also a
major cause of nitrate poisoning
11. Aftermath of Eutrophication
• Excess of nutrients get into the lake and other
water bodies usually caused by run-off fertilizers,
animal waste and sewage. This excessive growth
of nutrients causes algal deposits on the rivers.
After some days, the algae decomposes
producing foul smell and blocks the penetration
of sunlight. The oxygen content in the water
reduces due to scarcity of light and causes
anaerobic conditions, which is not good for the
plant and animal life in the water body.
12. Inorganic pollutants
•
The inorganic pollutants that cause adverse effects on
water bodies are as follows:
Cyanide exists in water as hydrogen cyanide, and can cause
nerve damage and thyroid problems.
Ammonia is formed during microbial degradation of
biomass and organic matters. The caustic nature of
ammonia, damages gills of fish. And also cause damage to
the nasal passages in Human beings
Hydrogen sulfide which evolves from geothermal waters,
and wastes from paper and textile mills, causes nervous
system poisoning.
