The Lochay power station is shut down for refurbishment at the moment. There is no water being extracted from the upper catchment, and no compensation flow coming back through the pipes from Glen Lyon either, hence the low water levels in the bottom part of the river. Part of the Drumchroisk basin is extracted towards Ben Lawers, but other than that, this is more or less a natural flow in the Lochay under dry conditions. Interestingly however, even with the very dry summer, in the upper river where the best juvenile habitat is, there is still a much greater area of gravel covered by water than there would be in most normal years when water was getting abstracted.
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