How did the Pearl River Delta become a megaregion?
The PRD's startling growth was fueled by foreign investment coming largely from Hong Kong manufacturers that moved their operations into the PRD. In 2003, Hong Kong companies employed 11 million workers in their PRD operations.
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It surpassed Tokyo in population, territory, and GDP. To date, the Pearl River Delta is China's most important economic hub, making up more than a fourth of the country's exports. It also has good trade relations with Germany and the United States.
The PRD megalopolis is an urban area of gargantuan proportions with few like it in existance. It's home to 65 million people, a population similar to that of the United Kingdom. It covers an area around 55,000 km^2, about the size of the country of Croatia.
In addition to urban floods, the PRD also faces saltwater intrusion near the river mouth of the Pear River. This has been a threat to the water security of nearby cities, in particular Zhongshan, Zhuhai and Macau.
A delta is a wetland area that forms as river waters empty into a larger body of water. Often, deltas look triangular in shape and sometimes they're even described as looking like a fan.
The Sundarban delta is formed by the super confluence of the Ganga, Brahmaputra and Meghna rivers. It derives its name from the Sundari tree which grows in marshland. It is the world's largest and fastest growing delta.