Nan 'an County was located in Yong 'an, Soochow, the Three Kingdoms for three years (AD 260) and was named Dong 'an County. After the replacement of dynasties, it was changed to Jin' an and Liang' an. In the ninth year of Emperor Kaidi of Sui Dynasty (AD 589), it was called Nan 'an County, and in the early period of Emperor Sidi of Tang Dynasty (684), Wurong Prefecture was established, so Nan 'an was also called Nan 'an.
Nan 'an was once the political, economic and cultural center of southern Fujian, known as the "Zou Lu on the seashore", and Jinji Ancient Port in Fengzhou was the starting point of the ancient Maritime Silk Road. Ouyang Zhan, the pioneer of Bamin culture in Tang Dynasty, Li Zhi, an outstanding thinker in Ming Dynasty, national heroes Zheng Chenggong, Ye Fei, famous patriotic overseas Chinese Li Guangqian, Huang Zhongxian, etc., were originally from Nan 'an. Nan 'an is one of the three cities in Quanzhou in Qing Dynasty. As a large number of Nan 'an people emigrated overseas in modern times, Nan 'an became a famous hometown of overseas Chinese in China.
Water resources in Nan 'an City
Nan 'an streams are vertical and horizontal, with complicated flow direction and feathery water system. Rivers mainly belong to Jinjiang water system and coastal water system. The development of the Neocathaysian water system is controlled by two groups of active faults. Jinjiang, the main river, and its east and west streams pass through the structural line. Rivers flow from northwest to southeast in the north and middle, and their tributaries flow into the east and west streams in the northeast or southwest direction.
The east-west stream flows into Jinxi in Xizhou Village, Fengzhou in the lower reaches of Jinjiang, flows southeast through Jinjihe Bridge Gate, leaves Fengzhou and flows into Quanzhou Bay through Licheng District. The total length of rivers in this county is 400 kilometers, forming a water-rich system. The total amount of water resources is 2.503 billion cubic meters in wet years, 970 million cubic meters in dry years, and the average surface water1.547 billion cubic meters for many years.
The average runoff depth for many years is 600 ~ 1200mm, and the general trend of runoff is adapted to rainfall, decreasing from west to northwest to southeast. The head of the coastal well is 600 ~ 800mm, that of Dongtian in the northwest mountainous area is 900 ~ 1200mm, and that of Penghua and Shishan is 900 ~ 1000mm.
Reference to the above content: Baidu Encyclopedia-Nan 'an