Untitled - WWF - Pakistan

Detailed Ecological Assessment Report 2008 – Keenjhar Lake
assessment shows that the turbidity, BOD and COD were high along with the
toxic pollutants such as Cadmium and Lead in Keenjhar Lake water, collected
from the vicinity of KB feeder.
Sufficient organic load is observed in Keenjhar Lake as depicted by the high
values of BOD and COD, which is causing depletion of Dissolved Oxygen (DO).
The 4 mg/l is the lowest DO required for the survival of all types of fish species in
fresh water. In present study the DO values are found less than 3 mg/l, which is
not favorable condition for the juvenile fish stock and its further growth. This may
be the cause of fish decline in recent past.
It was also found that after monsoon, the Lead and Phenol levels have increased.
The use of Lead and Phenol containing substances in daily life may be the cause
of these types of wastes discharged in to Keenjhar Lake through the storm flow
drains and other human activities. The inorganic pollutants represented by
hardness, chloride, sulphates, calcium ion, magnesium ion, TDS, etc are,
however, found within the acceptable WHO drinking water quality guidelines. In
addition, this water quality also meets the FAO guidelines for agriculture and
livestock.
The two time sampling and analysis is limited to reach on concrete water quality
assessment and therefore regular water quality surveillance programme is
recommended. The public awareness program and training of
NGOs/communities is vital to address and arrest the environmental degradation,
especially in the picnic/tourist location area.
WWF Pakistan – Indus for All Programme
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