Heavy pre-Monsoon rain spells to improve aquatic life of Rawal Dam.

ISLAMABAD -- The recent pre-Monsoon rain spells that lashed various parts of the country and dropped mercury drastically after scorching heatwaves would help improve aquatic life of Rawal Dam as the reservoir is filled near to its maximum capacity.

Rawal lake, which supplies drinking water to the city of Rawalpindi, is home of various fish species, turtles, and aquaculture that created a unique ecosystem threatened by man-made pollution in the reservoir, said an official of the Fisheries Department of the Islamabad Capital Territory (ICT).

The water in the Rawal Dam was collected through the rainwater coming from the Margalla hills catchments which ultimately improves the growth of aquatic life. 'The rainwater along with dust and sludge brings various nutrients, micro plant species and organisms that help the aqua culture in the reservoir improve the quality of water which in turn helps synthesis of healthy habitat for the marine life', the Fisheries Department official told reporter.

He said the opening of spillways of the Dam was also another challenge that poses risk to the fish that faced damage during the process. 'The dam authorities are advised to avoid abrupt aperture of spillways that cause big fish to fall down rendering loss of precious species'.

The people used to catch the falling out fish by physically venturing into running water of the spillways which directly jeopardized those individuals' lives. However, in order to tackle this nuisance, the fisheries department has installed nets at a distance of 200-300 feet from the spillways to avoid drifting out of fish.

The Executive Engineer (XEN) of Rawal Dam Amir Mumtaz told reporter that the total storage capacity of the reservoir was 1752 which was at the moment filled up till 1745.5 feet with an extra cushion of 7.5 feet storage capacity available. He said the rainwater during the monsoon downpour used to fill the reservoir to its maximum capacity whereas the rains have stopped and this water would start receding in the coming days.

When contacted Deputy Director Fisheries Rawalpindi, Mir Latif, in his expert opinion, said rains used to bring nutrients and...