http://www.swktodc.govt.nz/district/district_info/tewaihou.asp
"The Waihou Stream is totally spring fed. Water from the Mamaku Plateau takes anywhere between 50-100 years to reach the Blue Spring Water flows from the Blue Spring at a rate of 42 cubic metres per minute (9240 gallons per minute). The water temperature of the Blue Spring is a constant 11 degrees celsius, come winter or summer.
The reason for the blue colour (and high visual clarity) of the Waihou River and its spring source is the high optical purity of the water. Pure water is intrinsically blue in hue because it absorbs red light leaving only blue and (some) green light to be transmitted to the observer's eye. Pure natural waters are blue to blue-green in colour because they lack light absorbing constituents. They also tend to be very clear because they lack light absorbing particles. Both particles and light-absorbing matter are efficiently removed during the long residence time of spring water while in aquifers"
Nice video.. that's what i fish in pennsylvania, although the water doesn't have the bluish green tint... it's still very clear..
Comingtoyaaahaaa 2 years ago
Sounds like another idyllic spot. I hope the fishing is good.
c2100 2 years ago
I liked the cow action, dad.
r2good 2 years ago
Me too, nice gentle animals
c2100 2 years ago