The lake levels are too high in the Waitaki hydro lakes so Meridian Energy has opened the spillway in Benmore dam:
More water from the Benmore dam fills Lake Aviemore so the spillway in the Aviemore dam is also open and that in turn puts more water into Lake Waitaki so the the Waitaki dam is now overflowing:
The Waitaki River is now flowing at 950 cubic metres a second. We might want to remember that next time there’s a power crisis.
However, the high flow is welcome because the flood will clean up a lot of the didymo (also known as rock snot) which is thought to have been brought into New Zealand is fishing waders and now infects many of our rivers.
The high flow will also move a bank which has developed at the river mouth.