The water is low due to maintenance work on the dam wall. BW have drained both the Yachter and Engine lakes to reveal the base of the dam wall. The lakes are also used to top up the canals, so this does also contribute towards such low levels. It is quite a sight seeing it so low.
I live right by the lakes and walk round their weekly. Just lately it’s as though there is no fish in there – with the water so low you’d expect to see fish topping/swirling all over, but the place is dead, not a fish to be seen. This may explain why it’s fishing so moody. As far as I am aware, all matches are running as usual.