Possible Clues:

• About 26,000 square miles of Asia
• It's been shrinking since 1960
• It borders Uzbekistan
• About 25,000 square miles in Asia
• Asian lake that has been steadily shrinking since the 1960s
• Waters fed by the Amu Darya
• The Dike Kokaral divides its two sections
• Body of water on the Uzbek border
• Lake that was formerly one of the world's largest
• Shrinking body of water in Asia