It seems to have been pretty much unanimously taken for granted that because 2 of the rivers of Eden (the Tigris and the Euphrates) are names of rivers in Iraq, that the biblical Garden of Eden is located either at the source or mouth of these 2 rivers, while the [Gihon or Pison] is arbitrarily identified with an ex Arabian river west of the Euphrates meeting towards south, and the [Pison or Gihon] is arbitrarily identified with an Elamite river east of Tigris meeting towards south. (The Gihon has also alt been connected with the Ceyhan/Seyhan to west of Euphrates diverging from it in north, or with the Nile, or else with the Euphrates which was also called by the name; and the Pishon has sometimes been identified with the [Indus/Ganges], or Seyhan.)
However, as pointed out in some of your previous posts there are some difficulties with this:
1 - It is possible that the Great Flood could have drastically altered the surface features of the Earth wiping out all traces of the rivers of Eden;
2 - The Tigris and Euphrates don't share a common source, &/or they didn't meet when the ancient gulf used to extend further north upto Ur, &/or in ice age the gulf was dry land;
3 - No definate proof of identification of the other (2) river(s) Pison (& Gihon);
(4 - Dilmun was in the north not Bahrein, &/or Dilmun ("Bahrein") is not at mouth or source of rivers.)
Moreover, somewhile ago I discovered a possible alternative theory of my own. A picture of the 4 rivers of Eden in Philipot uses the symbol of a circle with a cross in it ("sun wheel", note the CROSS? (river/blood)) which implies that the rivers were global/world sized rivers dividing the whole earth, which disqualifies the Euphrates/Tigris/Nile/etc as a glance at an atlas will show they are small-local not crossing continents (though there are said to be traces of lots of rivers under the Sahara desert). But then a glance at maps of the stages of the continental "drift" do show global/continental sized "rivers" dividing Pangaea along/between the edges of the future continents, suggesting the possibility that the continents may have split up (&/or come together) along the rivers of Eden, the rivers widening into oceans. (As-syria could then be Asia-Euros?) In ancient sources the borders of Europe, Asia and Libya/Africa were defined by rivers, (and in the Bible the borders of prophetic Israel are the Euphrates & Nile.) The ancients considered the seas/oceans as parts of 1 RIVER Oceanus.
Furthermore I have also found the Genesis account of the 4 rivers of Paradise in a number of mythologies around the world, confirming the historicity of both. The combination of the biblical and mythological gives a fuller picture, and seemingly strengthens my theory (esp some like the Aztec, Babylonian, Chinese).
-Judaeo-Xtian version: 4 rivers of Eden/paradise divide whole earth (ref: Philipot).
-Norse version: 4 streams Ymir/Audhumla (refs: JC Cooper.)
-Sumer-Akkad version: 4 rivers Karduniyash (T, E, Surappi, Ukni); 4 rivers Dilmun; "To water the 4 regions of the earth" (refs: A Heidel, .)
-Chinese version: Kun-lun source of 4 great rivers which flowed in 4 directions (ref Larousse.)
(-Indian version: 4 rivers Meru?)
-Aegean version: 4 rivers Thera.
-Aztec version: Tonacatecuhtli drove 4 roads thru centre of earth after cataclysm to disperse flood waters of the deluge (ref: M Jordan.)
-Peru: Cuzco 4 parts/divs.
-Navaho: In the age of beginning 4 streams flowed from the earth's center to the 4 cardinal points.
-Egyptian: Nile comes from core of earth.