BLUE LAKE NELSON LAKES NATIONAL PARK – NEW ZEALAND

The theoretical visibility in distilled water is about 80 metres, as estimated from the fine available instrumental measurements in the laboratory," says dr davies-colley. "so blue lake is a close method to optically pure water

Blue Lake (rotomairewhenua in māori) is a small fresh water lake in nelson lakes national park, within the northern reaches of recent zealand's southern alps. In a have a look at performed in 2011, researchers of the national institute of water and atmospheric studies (niwa) have located that the lake has excessive visual clarity of up to 80 meters, that's taken into consideration nearly as "optically clear" as distilled water. The visibility of blue lake even surpasses that of the renowned te waikoropupu springs in golden bay which has a visibility of sixty three meters.

Blue Lake is characterized by means of blue-violet colors visible handiest in the very clearest herbal waters. The lake is spring fed from the neighboring glacial lake constance, however the water passes via landslide particles that paperwork a dam among the two lakes. The herbal dam filters out almost all the debris suspended in the water giving the lake the most severe natural blue-violet coloration.

Nelson-primarily based niwa hydrologist rob merrilees first known that blue lake is probably optically extremely good, having discovered on tramping journeys that this water frame appeared extensively just like te waikoropupu. He mentioned his suspicions to niwa aquatic optics professional, dr rob davies-colley, who had led the unique work on te waikoropupu springs. On a preliminary tramping go to to blue lake in march 2009, the 2 robs have been surprised to locate that the visibility of blue lake surpassed that of te waikoropupu. They subsequently organised a scientific study of the lake with involvement of niwa scientist mark gall, an professional in ocean optics instrumentation. Numerous visits through helicopter (six in all) hooked up that the horizontal visibility inside the lake normally stages from 70–80 metres.