Khawaja Zaheer Ahmed - PDMA

vv) By that time, the water levels had substantially subsided, without
threatening any of the main irrigation structures.
ww) Downstream Kotri, at Thatta-Sujawal two major Bunds, MS Bund
on the left bank and PB Bund on right bank breached and flooded
vast areas, almost four weeks after the beginning of flash floods in
the KP.
xx) Breaches also took place in the Nara-Valley drain and bunds
around Mancher Lake that threatened Sehwan Airport and
PARCO’s refinery on 13 September.
yy) The induced breaches to the Lake’s bunds re-diverted the flood
water to Indus after inundating 40 villages.
zz) Likewise, RBOD I, II and III that drains water from Balochistan
suffered breaches and damages.
35. Extreme gaps were observed in the comparative flood forecasts from the
PMD and actual discharges that passed through various controlled structures of
Wapda and I and P departments. These were more pronounced during the
critical phases of peak floods. The following tables will flag the point:-
TABLE: PMD FORECAST AND ACTUAL DISCHARGE OF WATER
(‘000’ CUSECS)
DATE TARBELA MANGLA TAUNSA GUDDU SUKKUR
FORECAST
ACTUAL
PEAK
FORECA
ST
25.07.2010 45-50 46
26.07.2010 200-220 221 45-60 50
27.07.2010 210-230 239 50-80 70
ACTUA
L PEAK FORECAST
28.07.2010 250-290 280
459.0
100-200 170
29.07.2010 290-340 (+119)
835.0
130-250 221 230-245
31.07.2010 500-620 (+215) 200-340 267 280-350
ACTUAL
PEAK FORECAST
300.0
(+55)
824.0
(+474)
ACT
UAL
PEA
K
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FOR
ECA
ST
ACTUA
L
PEAK