Talk:Lost Lovers' Pool

Tides in Shalane Lake?
Hi. Tides in the Deepwash, of which Shalane Lake forms the western part, was doubted, as tides on Earth are usually only known from seas and oceans, not inland lakes. However, Deepwash is a huge lake and with a great depth too, so notable tides should certainly occur.

Here is the original note:


 * The sourcebook erroneously describes this as a "sea cave" and makes a note about accessibility only during low tide. As the Deepwash is an inland lake, it could not possibly have noticeable tides.

Not true. Deepwash Lake is enormous, more than 200 miles long and with very deep waters. It could well be compared to Lake Baikal in Russia, the largest freshwater lake on Earth. Lake Baikal experiences a tidal difference of about 1 metre. Look here fx.: https://tides4fishing.com/as/russia-vladivostok-time/baikal-bay Deepwash runs East-West, in contrast to Lake Baikal's South-North placement, this could lead to higher tides in Deepwash, as larger water-masses gets concentrated in narrower bays.

I would also like to point out, that Toril is about the same size as Earth, maybe a little bigger. And Selûne is about the same size as the Moon. Selûne, though, is significantly closer to Toril than the Moon is to Earth. There seems to be some dispute as to how close exactly, and the distance might have changed during the Spellplague and/or The Second Sundering. But being closer, gives a larger tidal effect. So the tidal effect on Toril is larger than here on Earth in all circumstances.

My best guess would be that the tidal effect in Shalane Lake could be 1.5 - 2 metres, maybe even more in some local bays. The tidal effect could be diminished by water currents from the inflow rivers, but I don't see how to assess that, it could be anyones guess.

Ith&#39;ilith Obran (talk) 03:05, October 13, 2019 (UTC)


 * Thank you for your interest in this topic.


 * I have looked into this, and your reasoning seems to make sense. Nevertheless, it is equally speculation, and there is no reason not to have a note about this in the article still. What I am going to do is tone down my language and include some of your speculation in the note, as a sort of middle-ground view.


 * ~ Lhynard (talk) 21:16, October 13, 2019 (UTC)


 * Hi. Sure. thank you for reading my long posts.


 * To confuse things, I have tried to look for more sound evidence for the tidal effect in Lake Baikal, as the numeric assessment depends on its credibility. I know this is not Wikipedia, but I really found the problem very interesting. I found out that the 1 m variation, was the seasonal variation in Lake Baikal, not the diurnal tide that occurs every day! (See the scientific source below) The diurnal tidal effect in the lake is only about 2-3 cm, which is quite smaller. This would make the difference between high and low tide just 4-6 cm. With the same arguments as above (which I still regard as fully credible) this would give The Deepwash a tidal difference of 6-12 cm. NOT very much!


 * I found the data in this book: "The Lakes Handbook: Lake Restoration and Rehabilitation" pp 180f
 * https://books.google.dk/books?id=bibY60NWOlEC&pg=PA179&lpg=PA179&dq=diurnal+tidal+Baikal&source=bl&ots=c7bforonQZ&sig=ACfU3U2TTDNEFcuuvTFNxc95-2VL1BEUoQ&hl=da&sa=X&ved=2ahUKEwim2NCtop3lAhULbVAKHaJjAb8Q6AEwB3oECAkQAQ#v=onepage&q=diurnal%20tidal%20Baikal&f=false


 * I am surprised how small the tidal effect really is, since Lake Baikal is almost 2 km deep in some areas. The tidal effect seems even smaller than what I could see for some of the Great Lakes. The science behind diurnal tidal effects is extremely complex and without having studied all the details and parametres, it seems that it might depend on surface area a great deal. Wow, I didn't knew this problem was so deep and full of interesting science.


 * The two sources on Lake Baikal tides does not agree, but I think we could probably discredit any notable diurnal tidal effect in Deepwash? From the new sourcebook, the tidal effect would probably not be more than 30 cm anywhere, taking all favorable parameters into account.


 * Whatever the truth is, there are many cyclic phenomena that could cause much larger amplitudes in the Deepwash water levels than basic diurnal tides. Wind, currents, seasonal changes (as mentioned), and then "unknown" sources. The latter could include occasional influx of water from subterranean springs for example.
 * Ith&#39;ilith Obran (talk) 03:45, October 15, 2019 (UTC), you can call me mr. Overkill :-D


 * Thank you, Mr. Overkill. :) This is really interesting. ~ Lhynard (talk) 21:11, October 15, 2019 (UTC)