Khawaja Zaheer Ahmed - PDMA

threats that loom in future. Besides professionally managing the
three main structures of Mangla, Tarbela and Chashma with
constant vigil from the top, Wapda rendered advisory services for
safety of various barrages to synchronise optimum retention of
flood water and attenuate releases. That helped minimise pressure
downstream at critical hours/days of rising floods without
compromising dam safety of Mangla and Tarbela Dams and
Chashma Barrage on the Indus. The nature & causes of breaches
of main embankments were analysed by it besides suggesting
remedial measures for short, medium and long term. Timely
rehabilitation of Mangla raising project in AJK will provide additional
relief to reduce adverse impacts of the floods besides adding
considerable revenue from additional power generation: The table
below highlights recurrent losses and potential for growth:-
RESERVOIR
RESERVOIR CAPACITIES (MAF)
ORIGINAL PRESENT LOSS
GROSS LIVE DEAD GROSS LIVE DEAD GROSS LIVE DEAD
TARBELA 11.62 9.69 1.92 7.73 6.62 01.18
MANGLA 5.88 5.34 0.54 4.67 4.54 0.13
CHASHMA 0.87 0.72 0.15 0.32 0.26 0.06
TOTAL 18.37 15.75 2.62 12.95 11.58 1.37
3.67 2.92 0.74
33% 31% 39%
1.21 0.80 0.41
21% 15% 76%
0.55 0.45 0.10
63% 63% 62%
5.42 4.18 1.25
30% 27% 48%
The Commission also noted simulated numbers of worst case
scenario; e. g. as noted earlier also, during first peak, Tarbela
reservoir received 835,000 cusecs, but only 603,000 cusec
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