The space in the interior of the Earth formerly occupied by the great deep is now a great gulf (chasm) of open space that Jesus spoke of in Luke 16:26. The open space is no longer referred to as tehom, it's now sheol.
Tehom was Wet. Sheol is Dry
Tehom
We (that's me and the Holy spirit) make a contextual connection between tehom and sheol because they're both used to refer to the underworld realm of the dead, also known as the grave.
Tehom became Sheol
The region between Earth's core and mantle, referred to by Jesus as a mega chasm or great gulf, has to transition from water filled to open space due to the expansion of hell.
It Devoured the Great Deep
Thus hath the Lord GOD shewed unto me: and, behold, the Lord GOD called to contend by fire, and it devoured the great deep, and did eat up a part. (Amos 7:4) KJV
September 10th
Four different Biblical phrases refer to a specific feature of the internal structure of the Earth. They confirm our hypothesis that the interior of the Earth was tehom before Noah’s flood, and sheol after it.
March 8th
During the third day Earth's surface rose out of the ocean at Rosh, the beginning. The ocean drained into Earth's interior through the fountains of the deep, which were then sealed somehow.