The water system and terrain characteristics of the Pearl River Delta

The Pearl River Delta is the largest plain area in Guangdong Province. The landform of the Pearl River Delta was formed by the convergence of the west, north and east rivers in the Pearl River and the sediment carried by the Pearl River. After thousands of years of deposition along the river, an alluvial plain with a thickness of 40 to 60 meters was formed in the middle and lower reaches. Larger settlements gradually appeared in Xinhui, Shunde, Panyu, Dongguan, Xiqiao Mountain in the South China Sea, and Guidao south of Guangzhou.

With the changes in the natural environment, the ancient Pearl River Delta composed of the Xijiang and Beijiang deltas gradually became connected, and connected with the Dongjiang Delta that later became land, forming the modern Pearl River Delta. Since the Pearl River Delta is located south of the Tropic of Cancer, with a mild climate, abundant rainfall, and long sunshine hours, it is uniquely positioned for the development of agriculture, animal husbandry, and fishery.

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Since the beginning of the 20th century, Chinese and foreign geology, geography, hydrology, and water conservancy engineering circles have been discussing whether there is a delta in the Pearl River Estuary. There were different opinions on the issue. Later, the denial theory once prevailed, and its advocates included many heavyweight Chinese and foreign scholars.

For example, the Swedish water conservancy expert Wilhelm Kovilien only recognized the small-scale delta with sand accumulation from Guangzhou to Macao, called the "Guangzhou Delta", while the Swiss professors Droffes and Haam who were teaching at Sun Yat-sen University at the time They simply claimed that there was no Pearl River Delta. Chen Guoda, who later became a famous geologist, was also a supporter of the "denial theory" at that time.

Baidu Encyclopedia - Pearl River Delta