Holden (Hong-Quan) Zhang has a PhD in Fluid Mechanics and joined the University of Tulsa in 1998. In 2019, he published Revive Eden: Green Sahara Now.  which investigates the disappearance of the Green Sahara and the possibility of reversing that event, not just in the Sahara, but in other desert regions also. In chapter nine of the 2nd edition of his book, he outlines his Atlantis theory.
Additionally, he recently published a YouTube video(a), in which he places Atlantis in what are now the chotts of Tunisia and Algeria. Although Zhang endeavours to present this as a new idea, it is not. In fact, it has been around for about a century, with continuous support ever since.
Zhang claims that his theory matches Plato’s description of Atlantis 100%! Wrong again; Plato clearly states twice (Tim.25a-b & Crit.114c) that Atlantean territory included some of North Africa along with part of southern Italy as well as a number of the islands in the Central Mediterranean region. So, in my opinion, Zhang is only partly correct regarding the extent of Atlantean territory. Nevertheless, I think he has made a useful contribution to the Atlantis debate.
A full written outline of Zhang’s theory is also available online(b).
I was amused to read in the same 2021 paper that Zhang wrote as follows about Aristotle’s description of the Atlantic Sea,
“This is not a description of the Atlantic that we know, which is not shallow, calm or lying in a hollow and which he refers to as a ‘sea,’ not an ‘ocean’.”
In 2018, on page 158 of Joining the Dots, I wrote;
“This is not a description of the Atlantic that we know, which is neither shallow, calm nor lying in a hollow and which Aristotle also refers to as a ‘sea’ not an ‘ocean’.”!!!!!
A further paper by Zhang was published in 2022 in support of his theories. This time he used details from ancient Egyptian Pyramid Texts.(c) >Zhang offers a video to accompany the paper(d).<
Tunisia has now offered evidence of human activity dated to nearly 100,000 years ago(d) at a site near Tozeur, in the southwest of the country, where the chotts are today.
Tunisia was proposed in the 1920s, by Albert Herrmann, as holding the location of Plato’s Atlantis, at a dried-up saltwater lake known today as Chott el Djerid and was, according to Herrmann, previously called Lake Tritonis. Around this same period Dr. Paul Borchardt, a German geologist, also favoured a site near the Gulf of Gabés, off Tunisia, as the location of Atlantis. He informed us that Shott el Jerid had also been known locally as Bahr Atala or Sea of Atlas.
>Hong-Quan Zhang has a Ph.D. in Fluid Mechanics and lectures at Tulsa University. He is a recent supporter of Atlantis being located in the chotts of Tunisia and Algeria.(l) He offers his interpretation of excerpts from the ancient Pyramid Texts in support of his contention.(m) <
More recently, Alberto Arecchi developed a theory that places Atlantis off the present Tunisian coast with a large inland sea, today’s chotts, which he identifies as the original ‘Atlantic Sea’, straddling what is now the Tunisian Algerian border. Arecchi claims that this was nearly entirely emptied into the Mediterranean as a result of seismic or tectonic activity in the distant past.
In 2018, Charles A. Rogers published a paper(f) on the academia.edu website in which he identified Tunisia as Atlantis with its capital located at the mouth of the Triton River on the Gulf of Gabes. He favours Plato’s 9.000 ‘years’ to have been lunar cycles, bringing the destruction of Atlantis into the middle of the second millennium BC and coinciding with the eruption of Thera which created a tsunami that ran across the Mediterranean destroying the city with the run-up and its subsequent backwash. This partly agrees with my conclusions in Joining the Dots!
There is clear evidence(b) that Tunisia had been home to the last wild elephants in the Mediterranean region until the demise of the Roman Empire. Furthermore, North Africa and Tunisia in particular have been considered the breadbasket of imperial Rome supplying much of its wheat and olive oil. In particular the Majardah (Medjerda) River valley has remained to this day the richest grain-producing region of Tunisia(i). Roman Carthage became the second city of the western empire. Although the climate has deteriorated somewhat since then, it is still possible to produce two crops a year in low-lying irrigated plains of Tunisia. Furthermore, around the mountains of northwest Africa, there is an abundance of trees including Aleppo pine forests that cover over 10,000 km2 (h). All these details echo Plato’s description of Atlantis and justify consideration of Tunisia as being at least part of the Atlantean confederation.
It is worth noting that Mago, was the Carthaginian author of a 28-volume work on the agricultural practices of North Africa. After the destruction of Carthage in 146 BC, his books were brought to Rome, where they were translated from Punic into Latin and Greek and were widely quoted thereafter. Unfortunately, the original texts did not survive, so today we only have a few fragments quoted by later writers. Clearly, Mago’s work was a reflection of a highly developed agricultural society in that region, a description that could also be applied to Plato’s Atlantis!
In 2017, the sunken city of Neapolis was located off the coast of Nabeul, southeast of Tunis. This city was reportedly submerged by a tsunami ”on July 21 in 365 AD that badly damaged Alexandria in Egypt and the Greek island of Crete, as recorded by historian Ammianus Marcellinus.(e)(g)” However, water from a tsunami eventually drains back into the sea, but the demise of Neapolis might be better explained by liquefaction, in the same way, that Herakleion(j), near Alexandria, was destroyed, possibly by the same event. Neapolis and Herakleion are around 1,900 km apart, which suggests an astounding seismic event if both were destroyed at the same time!(e)
In addition to all that, in winter the northern coast of Tunisia is assailed with cold winds from the north bringing snow to the Kroumirie Mountains in the northwest(c).
Interestingly, in summer 2014, a completely new lake was discovered at Gafsa, just north of Shott el Jerid and quickly became a tourist attraction(a), but its existence was rather short-lived.
In November 2021, Aleksa Vu?kovi? published an article on the Ancient Origins website reviewing the current evidence for a Tunisian location for Plato’s Atlantis. Unfortunately, nothing new is offered that you cannot find here(k)!
To be clear, I consider parts of Tunisia to have been an important element in the Atlantean alliance, which according to Plato, also included southern Italy along with some of the Mediterranean islands (Tim.25a-b).
Chott el Jerid is one of a series of ancient salt lakes (sometimes spelt shott or shat) in Tunisia that stretches from the Gulf of Gabés westward into Algeria, south of the Atlas Mountains. It is the second-largest salt lake in the world after Salt Lake in Utah. It is maintained that ancient Lake Tritonis was located in this region and possibly incorporated Chott el Jerid and at some point may even have extended as far as an enlarged Lake Chad.
These chotts are not, strictly speaking, lakes at all today. They are flat depressed areas, which for most of the year are areas of dried mud covered with a thick skin of salt,>suggesting an earlier connection with the Mediterranean.<
>The principal chotts are Chott el Djerid, Chott ech Chergui, Chott Melrhir, Chott el Fejej and Chott el Hodna.<
The largest, the Chott el Jerid, is just a few feet below the level of the Mediterranean, according to Wikipedia. However, François Roudaire, a 19th-century French geographer, surveyed the chott and reported that the entire salt lake was 15 metres above the level of the Mediterranean. This fact was confirmed by Edward Dumergue in his 1883 booklet, The Chotts of Tunis.>In the same publication [p.5] he mentions Roudaire “showing how these chotts could be formed into one great inland sea, extending from near Biskra and Chegga in Algeria, through Tunis, to the Gulf of Gabes, about 300 miles in length and about 60 in breadth, forming a new gulf into the Mediterranean, with an area somewhat greater than the Irish Sea.”<
It is worth noting that Diodorus Siculus records that around 1250 BC catastrophic seismic activity across North-West Africa from the Gulf of Gabés to the Atlantic radically changed the topography of the region. Some investigators see this event as being responsible for the cutting-off of these inland seas from the Mediterranean creating today’s salt lakes. This idea is not as fanciful as it might seem at first sight when you consider the geological instability of the Central Mediterranean region. A well-known example is to be found at the Macellum of Pozzuoli near Naples which has been rising and falling over the past two millennia, due to movements in the volcanic caldera on which it sits.
Wintertime can produce up to a metre of water in these chotts, which by liquefying the mud makes them perfectly impassable. There is a clear suggestion that these chotts represent an inland sea that was once connected to the Mediterranean. It is believed that seismic activity in the area cut this connection. All around these salt lakes there are numerous springs, rushing from the sandy hillocks. Virtually all these springs are very near boiling point. The town of Gabés is close to a grand oasis, which is maintained by water from a stream emptying itself into the sea at Gabés after a short run.
More than one writer has placed Atlantis in this region. Paul Borchardt and Albert Hermann in the early 1920s and more recently Alberto Arecchi have advocated this idea. Borchardt reported that the local name of Chott el Jerid was Bahr Atala or Sea of Atlas.
Arecchi concurs with this explanation and is convinced that the inland sea was the original ‘Atlantic Ocean’. He quotes the Book of Jubilees to support this contention(a).
>In 2021, Hong-Quan Zhang also placed Atlantis firmly within what is now the northwest region of Africa, specifically identifying the capital’s location at the eastern end of Chott el Jerid in modern Tunisia(e).<
A contributor to a June 2012 forum(b) provided a link(c) to an interesting satellite image, as well as the following list of fifteen points favouring the chotts as a location for Atlantis:
1) Atlantis did not sink to “the bottom of the ocean” instead it became a “muddy shoal only several feet below the water surface”
2) It’s to the West of both Egypt and Greece
3) The Chotts used to be a large “mega-lake” and you can use a sea-level map to simulate how large this lake used-to be
4) That mega-lake is very likely to be the mythical “Lake Tritonis” that the Greeks ascribed to this area
5) Herodotus spoke of Tritonis in relation to peoples near mount Atlas who referred to themselves as Atlanteans
6) There are Carthaginian coins from this area with Elephants (and older petroglyphs with Elephants and diverse fauna)
7) One phase of the local art was highly similar to the Minoan\Sea Peoples influence
8) The local Deity is syncretically equal to Neith (who was deemed syncretically equal to Athena by Egypt in the tale)
9) Another local Deity is syncretically equal to Poseidon
10) The tale of the Amazons is corroborated genetically from Tuscany to Corfu to this Region (the Amazons fought the Atlanteans)
11) The Berbers often claim to have a heritage from Atlantis (not a big deal, so does half the Mediterranean and South America… etc)
12) Several ancient sources claim that this “mega-lake” emptied via a geological cataclysm. The event precedes the Sea Peoples epoch.
13) The name ‘Gabes’ is arguably linguistically closer to ‘Gades’ than Cadiz (Spain).
14) Gafsa (Caspa) was legendarily the home of the Libyan Herakles and resided between two mountains
15) It’s closer proximity to Egypt and Greece make it more plausible as a Bronze Age power than Gibraltar where it would be essentially like living on the moon in that age. (In no order).