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Southern States - Kerala-Thiruvananthapuram Printer Friendly Page   Send this Article to a Friend

Disruption in power supply may continue till Sept. 28

By Our Staff Reporter

THIRUVANANTHAPURAM Sept. 25. The disruptions in power supply to the Kerala Water Authority's (KWA) pumping station at Aruvikkara, which has thrown pumping out of gear, thus causing acute drinking water scarcity all over the city, are expected to continue till September 28.

The power disruptions are on account of maintenance work on the transmission towers of the 220-KV line between Edamon and the Pothencode sub-station of the Kerala State Electricity Board. Two towers on this route are being replaced. `Bay extension' work is also on at Pothencode for drawing a 220-KV line from the 400-KV sub-station at Pallipuram.

Though the water supply in the low-lying areas in the city have been largely unaffected, the situation in elevated areas such as Thirumala, PTP Nagar and Poojapura is particularly bad. Attempts to increase the flow of water to reservoirs at PTP and Thirumala by adjusting the valves that control water supply to the low-lying areas, have met with partial success thanks to an overall drop in the volume of water available in the city's distribution network.

Even though there is disruption of power to Aruvikkara only for about five to 10 minutes in the morning and evening, the raw water and fresh water pumps at the pumping station_ once they stop _ take about 45 minutes to resume pumping at full capacity.

Even after resumption of peak pumping at Aruvikkara, it takes three to four hours for the restoration of optimum pressure in the city's distribution network. Power disruptions also cause unnecessary wear and tear in these pumps that normally function round the clock.

According to KWA officials, the delicate balance of demand and supply of drinking water in the city can be gauged from the fact that the storage reservoirs at various points in the city start emptying 15 minutes after pumping is stopped at Aruvikkara.

Officials of the KWA say they are also worried about the generation of `air blocks' in the city's distribution network and in the various storage reservoirs. The distribution lines out of the reservoir at Peroorkada, for instance, can get an air block once the water level at the reservoir falls below the 70 cm mark. Once an air block sets in, it can take up to two days to restore normal supply of drinking water in those lines.

The KWA is holding meetings of its engineers, daily, to monitor the drinking water situation in the city.

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