Hydro Lake Storage Declines During January

At the beginning of January 2007, New Zealand’s hydro-electric lake storage stood at 3552 Gigawatt hours (GWh), 121% of the average for the time of year. By month’s end, storage had declined slightly to 3524 GWh which was 111% of average.

Despite the slight decline in storage, lake levels were considerably above figures for January 2006 during which storage ranged between 69% and 89% of average.

Daily inflows were below average for most of January 2007, reflecting drier weather conditions in lake catchments. Inflows were erratic, often hovering around the 80th percentile with the odd day boosting inflow figures to above average levels. This indicates that elevated inflows from a late snowmelt caused by the cool spring have run their course, and replenishment now relies on rainfall.

[Compiled from data supplied by M-co.]

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