Talk:Hornindalsvatnet
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Depth
[edit]Article says the depth is 612 m, but the infobox states 514 m. Which depth is regarded as correct? Berland 20:07, 24 March 2007 (UTC)
- The "official" depth is 514 meters. There have been reports of measurements higher than this, 612m by Telenor is the highest I've heard of. The thing is, the bottom of the lake has deep ravines and is very uneven, so if you measure 3 times on aproximately the same spot, you get 3 different results. No thorough survey for absolutely deepest spot has been made to my knowledge. --Eivind Kjørstad 09:49, 13 November 2007 (UTC)
- Thanks, I rewrote the text a little bit. It would be good to have references for both the official depth, and the Telenor measurements. --Berland 16:26, 13 November 2007 (UTC)
- Do you know, if there any missions planned to get the exactly depth of the lake? Maybe such a mission could be operated by a manned or unmanned submarine boat.--Holger1974 (talk) 18:31, 19 July 2008 (UTC)
- I have attempted to track down the true depth of the lake, and contacted the Norwegian Water Resources and Energy Directorate, which performed the official measurements of this lake's depth. According to them, the depth was measured first in 1931, and then later more accurately in 1974, whence the number 514 m comes. This measurement used echo sounding combined with normal sounding using inelastic cable. The same method has been tested vs. modern methods recently in another lake, and found to be very reliable. Furthermore, the bottom of the lake is flat, smooth and dominated by sediments according to the directorate, making it unlikely that deeper crevases could have been missed. The water resources and energy directorate was not aware of a Telenor measurement in the 1990s, and when I contacted Telenor directly, they said that the only time they had measured the depth of Hornindalsvatnet was the autumn of 1973. They had no record of the depth of that measurement, but seeing that it was performed [b]before[/b] the official measurements, using the same method, this is not enought to cast doubt on the official numbers. Does anybody have any more in-depth information contrary to this? If not, I will remove the 612 m claim in the article, as it seems most likely to be incorrect. Amaurea (talk) 19:58, 5 September 2012 (UTC)
- Thank you very much for these detailed information. --Holger1974 (talk) 21:40, 4 December 2012 (UTC)
- I have attempted to track down the true depth of the lake, and contacted the Norwegian Water Resources and Energy Directorate, which performed the official measurements of this lake's depth. According to them, the depth was measured first in 1931, and then later more accurately in 1974, whence the number 514 m comes. This measurement used echo sounding combined with normal sounding using inelastic cable. The same method has been tested vs. modern methods recently in another lake, and found to be very reliable. Furthermore, the bottom of the lake is flat, smooth and dominated by sediments according to the directorate, making it unlikely that deeper crevases could have been missed. The water resources and energy directorate was not aware of a Telenor measurement in the 1990s, and when I contacted Telenor directly, they said that the only time they had measured the depth of Hornindalsvatnet was the autumn of 1973. They had no record of the depth of that measurement, but seeing that it was performed [b]before[/b] the official measurements, using the same method, this is not enought to cast doubt on the official numbers. Does anybody have any more in-depth information contrary to this? If not, I will remove the 612 m claim in the article, as it seems most likely to be incorrect. Amaurea (talk) 19:58, 5 September 2012 (UTC)
- Do you know, if there any missions planned to get the exactly depth of the lake? Maybe such a mission could be operated by a manned or unmanned submarine boat.--Holger1974 (talk) 18:31, 19 July 2008 (UTC)
- Thanks, I rewrote the text a little bit. It would be good to have references for both the official depth, and the Telenor measurements. --Berland 16:26, 13 November 2007 (UTC)
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