What is the name of the estuary surrounded by the delta containing Changzhou Island?
Pearl River Delta The Pearl River Delta Metropolitan Region (PRD), also known as Zhujiang Delta or Zhusanjiao, is the low-lying area surrounding the Pearl River estuary, where the Pearl River flows into the South China Sea. It is one of the most densely urbanized regions in the world and is an economic hub of China. This region was also the source of much Chinese emigration from the 19th to the mid 20th centuries, including to the Western world, such as the US, Canada, Australia, Latin America, and much of Southeast Asia, where they formed many Chinatowns. Today, much of the Chinese diaspora traces their ancestry to this region.
Mekong Delta The Mekong Delta (Vietnamese: "Đồng bằng Sông Cửu Long" , "Nine Dragon river delta" or simply Vietnamese: "Đồng Bằng Sông Mê Kông" , "Mekong river delta"), also known as the Western Region (Vietnamese: Miền Tây ) or the South-western region (Vietnamese: Tây Nam Bộ ) is the region in southwestern Vietnam where the Mekong River approaches and empties into the sea through a network of distributaries. The Mekong delta region encompasses a large portion of southwestern Vietnam of over 40500 km2 . The size of the area covered by water depends on the season. The region comprises 12 provinces: Long An, Đồng Tháp, Tiền Giang, An Giang, Bến Tre, Vĩnh Long, Trà Vinh, Hậu Giang, Kiên Giang, Sóc Trăng, Bạc Liêu, and Cà Mau, along with the province-level municipality of Cần Thơ.