Writing this in Auckland at the end of January has water very much the topic of the day.
We certainly got a walloping with the amount of rain, as did surrounding regions, and the amount of silt moved around is probably incalculable. I have a small stream along my property's rear boundary that is usually ankle deep but was running at around two metres deep for many hours and once the level dropped the next day, we had a wider, stripped bare stream bed with 90 per cent of the riparian vegetation probably