The lands on the eastern bank of the Caspian Sea (southwestern Kazakhstan and western Turkmenistan) are the arid Garagum / Karakum Desert.
qwertyuiop
The Caspian Sea is inside the European arid region (or desert). That is how the two are related to each other.
It runs through the lowlands [desert] to the Caspian Sea
It runs through the lowlands [desert] to the Caspian Sea
It the lowland that surrounds the caspian sea.
qwertyuiop
It runs through the lowlands [desert] to the Caspian Sea
It's located in the mentioned region.
its has the same water
It flows to the Caspian sea.
The caspian sea.
The Caspian Sea: It has a delta. In Caspian Sea.