I’ve tried hard to put a name on the color of the glacier water in the lakes and rivers. It’s extraordinary. Turquoise, bird’s nest blue, opal….perhaps aquamarine matches the remarkable fantasy, paintbox color that I’ve had the pleasure to see 
Here’s the “Roaring Meg,” the “turbulent streams that drives Te Wai a Korokio,” a hydro electric power station. There’s a legend about how the stream was named the “Roaring Meg,” involving a noisy barmaid who was carried across it by two men–Meg was with her friend Annie, a shy girl, and the stream next door is appropriately called the “Quiet Annie.”
[more coming]