Hydro Lakes Stable

Hydro storage was above average for most of October 2008 but reduced inflows at the end of the month dragged levels down.

At the beginning of October 2008, New Zealand’s hydro-electric storage lakes held the equivalent of 2176 GigaWatt hours (GWh) of energy, their levels being 96% of average for the time of year. By the end of the month, the lakes held 2357 GWh, 97% of average.

Storage improved during the first week, continuing the trend set during September. Levels were 100% of average or better on 19 days, peaking at 107% of average on the 8th but declined thereafter.

Inflows were mostly above average during the first 10 days of the month. However, the dominant trend was for below average flows which were recorded on 19 days. From October 11th, above average inflows were recorded on only three days.

South-to-north transfers via the Cook Strait cables exceeded southbound transfers on 27 days.

After matching weekday for weekday, demand was lower than the same day last year on 22 days. Average daily demand during October 2008 was 101.9 GWh, lower than the previous October’s 103.1 GWh. Peak load reached 111.2 GWh on October 23rd, again lower than the peak demand day during October 2007 when 112.2 GWh was drawn on the 3rd.

[Compiled from data supplied by M-co.]

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