Pastii nazdi bahri siyoh, hamvoriest dar Respublikai Sovetii Sotsialistii Ukraina, bayni daryohoi Dunay (az Farb) va Kalmpus (az Shimol), ki to bahrhoi Siyoh va Azov tul kashida, sathi on ba samti Janub kame nisheb ast. Balandiash az sathi bahr 10— 150 metr.
Az tahnishasthoi bahrii paleogen va neogen (ohaksang, peg, gil) tarkib yofta, bo lyossu gilhoi regdori lyossmonand pushida shudaast. Hamvoriro vodii vasei daryohoi Dnepr, Bugi janubi, Dnestr va gayra burida meguzarand. Sohilhoyash rostfaromadaand, dar in jo prosesshoi lagjish zud-zud ba vuqu meoyand. Limankho dorad (Dnepr, Dnestr va gayra). Hamvori dar zonai dashti khokash siyoh va dorchinrang voqe gardidaast.