Please click here for Dilmun possibly being Umm Daleimin by Qurnah on the Shatt al Arab River in Iraq
Below a marsh Arab in Lower mesopotamia plies his boat, a shape from 4th millennium BCE times, through the high reeds, harvesting them to make reed matts as well as reed houses. I understand that Dilmun lies in this area. (For the below photo cf. p. 122. Micheal Roaf.
Cultural Atlas of Mesopotamia and the Ancient Near East. New York. Facts on File. 1990)