Untitled - WWF - Pakistan
Untitled - WWF - Pakistan
Untitled - WWF - Pakistan
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Detailed Ecological Assessment Report 2008 – Keenjhar Lake<br />
salinity/TDS and Ni content which is above the NEQs. The other<br />
parameters given in Table 2 were within NEQs limits.<br />
Keti Bunder Creeks Area: The values of Keti Bunder water quality in<br />
creek areas were compared with the Coastal Water Quality<br />
Standards. The marine water quality values are those specified values<br />
which are considered safe for the marine life, fish, and mangrove<br />
growth. The results show that except for the phenol and nickel, the<br />
values of all parameters are well suited for all type of fish, prawn, and<br />
Palla fish grown in marine water (Table 3). The cause of high nickel<br />
and phenol contamination could be attributed to the increasing level of<br />
pollution (municipal and industry waste) entering in to sea from<br />
Karachi.<br />
In Bhoori creek area people are using hand pump for drinking water,<br />
hence the sample was collected to find the drinking water quality<br />
parameters. The results of the tube well water show that the water<br />
quality is not very good, as it has the influence of the sea. The TDS<br />
and the salt concentration (calcium, magnesium chlorides and) were<br />
found exceeding the WHO drinking water quality standards. The nickel<br />
and phenol levels were also violating the WHO guidelines. Other<br />
parameters as reflected in Table 4 are within WHO safe limits.<br />
• Keenjhar Lake<br />
The total dissolved solid, TDS (or conductivity) is very important<br />
parameter along with pH in determining the water quality. The values<br />
of both in all samples fall within WHO acceptable range. The TDS<br />
below 500mg/l shows that the dissolved solids are on good side<br />
considering all of its uses.<br />
The turbidity (or TSS) is also within WHO standard of 5 NTU except at<br />
locations KL-A6 and A7 (Pre monsoon). These location points are<br />
near to K.B feeder. The K.B feeder receives water from Indus River at<br />
Kotri Barrage which contains high turbidity. The relatively higher levels<br />
were also noted at these locations during 1 st sampling (before<br />
monsoon) period.<br />
The dissolved oxygen is found low (Less than 3.0mg/l) as the good<br />
quality surface water normally has dissolved oxygen as high as 9 mg/l<br />
(depending upon pH and temperature). The depletion of dissolved<br />
oxygen is an indicator of organic pollution causing BOD and COD.<br />
This was found more so when the water level and flow were low<br />
before monsoon period.<br />
The Indus water is generally contaminated carrying organic and<br />
inorganic pollution load from upstream human activities. The Sindh<br />
Environmental Protection Agency (SEPA 2002) reported that the<br />
Indus River BOD is over 6.5 mg/l, which according to Global<br />
Environmental Monitoring System (GEMS) classification puts this river<br />
as “highly polluted”. K.B feeder also carries the municipal effluents of<br />
Jamshoro and industrial effluents of Kotri site. The high levels of BOD<br />
and COD indicates that sufficient pollution is exerted in before<br />
monsoon period through K.B feeder water.<br />
<strong>WWF</strong> <strong>Pakistan</strong> – Indus for All Programme Page 132 of 165