Talk:Lake Taupo

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Contents

[edit] Coordinates

Can someone put in a geo.position spot roughly for Taupo?

Use Taupo township (at the north end of the lake), which is 38.41S 176.7E

Stuartyeates 14:03, 7 February 2006 (UTC)

[edit] Layout broken

The location pic seems to have broken the page layout, a lot of whitespace is showing between the second and third section. —The preceding unsigned comment was added by 203.118.190.86 (talk • contribs) .

Now fixed, at least in my browser. -- Avenue 08:04, 21 August 2006 (UTC)

[edit] Apparently misplaced text on Taupo eruption

The text regarding the effects of a Taupo eruption on the Maori and Japanese cannot possibly refer to the Oruanui eruption since this took place some 26,500 years ago. I believe that this text should be moved to the paragraph discussing the 181 AD eruption . . . I would have performed this edit, but I couldn't locate corroborating support after a quick search this morning. Can someone else confirm that this text move is warranted?

Myasuda 13:29, 29 September 2006 (UTC)

I can't confirm the Maori reference, but it is almost certainly untrue as the eruption was before recorded history, let alone the Maori arrival in NZ. I went ahead and removed the Japanese reference as it's irrelevant to the article anyway. --Tireoghain2 10:26, 4 October 2006 (UTC)
Agree. --Bender235 21:54, 13 December 2006 (UTC)

[edit] Date of last eruption (AD 181)?

What is the source for the date (AD 181) of the most recent eruption? And what is the range of uncertainty of the date? It seems to me that the evidence for this date ought to be cited in the article. Richwales 04:30, 26 December 2006 (UTC)

I believe the latest date is 230 AD. I can't remember the specific evidence, but it was given in a talk by Dr Colin Wilson (of IGNS, who is one of the authorities on the TVZ). It is cited in a book on NZ volcanism by Bruce Hayward and Geoffrey Cox, and I know Dr Hayward would not give the date if he didn't have good reason to believe it. User: pkeestra, 18.20, 26 December 2006 NZT

I looked up this date; it is quoted in Sparks, R.J., Melhuish, W.H., McKee, J.W.A., Ogden, J., Palmer, J.G., Molloy, B.P.J. 1995. 14 C calibration in the Southern Hemisphere and the date of the last Taupo eruption: evidence from tree-ring sequences. Radiocarbon 37 (2): 155–163. User: pkeestra, 19.00, 26 December 2006 NZT

the dates on the page now show eg as "180 CE", not as "180 AD". Why? —Preceding unsigned comment added by 125.237.69.146 (talk) 21:35, 10 October 2008 (UTC)

[edit] Presence of Eels within Lake Taupo

The reference to the presence of Short finned Eels in Lake Taupo is incorrect, and is fact one of the more unusual facts about the lake.

Nztayls 09:10, 4 April 2007 (UTC)

There are no eels in Lake Taupo, the reason for this is that eels need to go to the sea to spawn, and between Lake Taupo and the sea there are the Huka Falls, although adult eels would be able to go down these, the young eels returning from the sea would not be able to go back up them. User: tome23, 0943, 24 April 2007 NZT

[edit] Nitrate leaching into Lake Taupo

Perhaps a section should be introduced on the evidence collected by Doc,Environment Waikato etc, which shows that the clarity of the water has been getting steadily worse over time. The test involves dropping a white disk into the water until it cannot be seen. Nitrate leaching due to farming runoff has implications on the trout fishing industry where the numbers of smelt have been steadily decreasing along side the average size of Trout based on published Doc figures. --Zven (talk) 04:48, 6 May 2008 (UTC)

A couple of links that might be useful:
-- Avenue (talk) 13:18, 17 May 2009 (UTC)

[edit] Lake Depth

Lake depth varies depending on source. I dont know where the depth used came from but other depths found at

Gosh, which one to use.

Several sources do seem to cluster around 163-164 m. Here are a few more:
The last one dates back to 1927.
Some of the variation might be due to variation in lake levels — outflows are managed by Mighty River Power to keep the lake level within their resource consent limits of 355.85–367.25 m above sea level — or even the 0.5 m ground deformation that's been observed in recent decades from seismic unrest. But there's another depth near our current value of 186 m here: http://www.taupofortomorrow.co.nz/fishery/freshwater/lakes/ (186.84 m below chart datum of 355.85 m altitude), and anecdotal support here: http://www.minerals.co.nz/jago/press_releases.html. It seems that researchers were able to take a mini-submarine down to view geothermal vents at a depth of 184 m, in an area called "Les' Hole" - a deep spot discovered in the early 1990s by Deputy Harbourmaster Les Porter. This would explain why we have two groups of depth measurements, one around 163 m and the other around 186 m; the first group don't account for the recent discovery. So I think it's best to stick with our current figure, or something similar. It's probably worth addressing the discrepancy in a footnote, though. -- Avenue (talk) 14:10, 17 May 2009 (UTC)

Also according to *http://www.ilec.or.jp/database/oce/oce-01.html total Length of shoreline is 153km not 193km as posted in the main page. —Preceding unsigned comment added by 203.111.128.4 (talk) 22:51, 21 March 2010 (UTC)

—Preceding unsigned comment added by Tgaguy (talk • contribs) 08:48, 17 May 2009 (UTC)

Unlike depth, coastline length is not well defined (see coastline paradox), so I don't think we can expect complete agreement among sources. Here's another source giving a length for the littoral zone of 161 km.[1] -- Avenue (talk) 00:17, 22 March 2010 (UTC)
And another saying "over 170 km". -- Avenue (talk) 16:48, 22 March 2010 (UTC)
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