It outfalls into the sea in southern Vietnam and constitutes 12 provinces of the Mekong Delta .
The Mekong Delta formed by the Mekong River , which is Vietnam 's rice bowl , is the delta region situated to the south of Ho Chi Minh City ( Saigon ) .
Mekong Delta outfalls into the sea in southern Vietnam and constitutes 12 provinces of the region   .
The Mekong Delta formed by the Mekong River , which is Vietnam 's rice bowl , is the delta region situated to the south of Ho Chi Minh City ( Saigon ) .