The rivers that directly flow into the Caspian Sea, originate mainly from the north-eastern slope of the Greater Caucasus and Talysh Mountains and run along the Samur-Devechi and Lenkeran lowlands.
Rivers entering the Caspian Sea mainly stem from the north-eastern flank of the Greater Caucasus and Talysh Mountains, coursing along the Samur-Devechi and Lenkeran plains.