Want to know more about Rudong's history. Who knows?

Rudong is located in the northeast of the Yangtze River Delta, east longitude 120 42? 0? 7— 12 1 22? 0? 7. latitude 3212? 0? 7—32 26? 0? Its east and north are near the Yellow Sea. Before the recorded Spring and Autumn Period, siltation and shallow sea sandbars in the Yangtze River estuary gradually emerged from the water surface, forming estuary sandbars, which were called Zhou Fuhai in history. With the continuous siltation, sandbars are connected with the mainland, and human activities continue to move eastward. Before the Tang Dynasty, there were immigrants in Rudong. By the time of the Northern Song Dynasty, market towns such as port opening, tea making and Matang had been formed. In order to survive and resist the constant tide, the ancestors of Rudong began to build seawalls. However, in ancient times when science and technology were underdeveloped, the construction of seawalls was limited by geographical conditions, scientific means and even the separatist regime of local officials. Reclamation of seawalls can only be implemented in stages, and the effect of tide resistance is also very poor. With the advancement of the coastline, especially during the 700 years from1/kloc-0 to the north of the Yellow River in 28, the sea conditions accelerated eastward, the geographical environment and population growth changed greatly, and the requirements for moisture prevention and flood control were higher. Looking at the historical changes of Rudong seawall in ancient and modern times is actually an evolutionary history of Rudong. This paper makes a superficial study on the history of Rudong seawall.

I. Rudong Ancient Seawall

1. About the levee-actually, the levee was built in Yancheng, which was built and rebuilt on the basis of Li levee. Li Di was built by Li Cheng, a dangerous envoy of Huainan West Road in Tang Dynasty, and was continued by Wang in Northern Song Dynasty. Its main dikes are all in Yancheng area, and the history of Changfeng Weir, Li Chengchuan, the Book of the New Tang Dynasty, and the Records of Guangxu Yancheng are all recorded. It was built around 780 AD. In the fifth year of Tianxi in the Northern Song Dynasty, Fan Zhongyan came to Xixi in Dongtai as a salt supervisor, rebuilt and maintained the original Li Di, which was called "Hanhai Weir" in history. The dike was completed in 1024- 1028 (during the reign of Emperor Tiansheng of Tang Dynasty), starting from Baiju and Cao Yan in Dafeng and ending in Jiaqing and Bao Li. Gong Fan Dike is also divided into two stages. The first stage was built by Fan Zhongyan, and the second stage was built by Zhang Lun, the magistrate of Taizhou recorded in Records of Yan's Family. According to the history of China seawall project, Gongfan seawall is ten feet high, three feet thick at the bottom and one foot wide at the top. The dam winds along with the current. In order to dissipate the energy of waves outside the dike, the slope outside the dike is large, and turf is planted at the same time, which is also the earliest biological protection. To be sure, the dike lines at that time were all in the high tide zone, and it was impossible to build dikes on the low tide beach like modern technology. After Fan Zhongyan became prime minister, later generations praised his achievements, and his thought of "worrying about the world first and worrying about it ……" was touching, so the ancient seawalls in northern Jiangsu and central Jiangsu were usually called Fan Gongdi.

2. Rudong ancient seawall-Rudong ancient seawall is related to the merger of Rudong Shazhou Group. Rudong is made up of several sandbars, with Zhou Fuhai in Digging Harbor and Fengli, Nansha in Tea-tasting and Changsha in Changsha Town. When sandbars merged with land, they left tidal channels and ancient river lowlands. At that time, seawalls were difficult to build, so in the Tang Dynasty, scattered dikes could only be built in sections. Locals call it the Imperial Bank, which was built by the imperial court. Imperial Bank was built by local officials at that time, mainly salt officials. For example, Xu Ziyin, the magistrate of Taizhou, suggested that saltworks officials divide their sites. At that time, the direction of the Royal Embankment was Haiphong-Yangkou-Hu Angang-Changsha-Digging Port-Shengli Street-Haian No.9 Bridge. The reason for turning in Changsha Town is that the seawall passes through Changsha Island and then goes to the outer edge, and then to Fudao Island. Therefore, Juzhen Town is the lowest area in Rudong. Lijia River near Wangjiatan is a degenerated tidal river where sandbars meet and land. At that time, this section of seawall (from Duogazha to Changsha Town) was also a dangerous section of Rudong ancient seawall. There is a steep bend about 1-2km in the old seawall, and there is a deep pond relic in the seawall, which is a historical blank and is called Longtan locally. Now the coastal defense highway has been built, and the remains are hard to find. In addition, outside Pincha Town, about 3-4 miles inside the Imperial Embankment, there is a sandwiched embankment called Jigong Embankment. In the 12th year of Yongzheng (1734), it was built by Ji Zengyun, the chief river chief, and now it has been leveled and no longer exists.

At present, the ancient imperial dike in Rudong is on the south side of the coastal defense highway around Hexi and Hong Kong, and there are still relics. If you are interested, you may wish to go to the site to see the historic sites.

Second, the construction of modern seawalls in Rudong.

1965438+In June 2006, Zhang Jian, an industrialist in the late Qing Dynasty, raised funds10.5 million silver dollars to establish Dayu Reclamation Company. From Wangyuan Port to the north, 480,000 mu of land will be reclaimed from the sea, followed by130,000 mu, and Dutch water conservancy engineers will be hired for planning and design. Rivers in reclamation areas are divided into dry rivers and dry rivers. In the 1970s, the author demolished, overhauled and rebuilt these buildings, and found that their structures were reasonable, and the steel bar ratio, concrete strength and foundation treatment were exquisite and accurate, which was amazing.

At the same time with Zhang Jian, Shao Minghua of Shaoxing, Zhejiang raised 340,000 silver dollars to establish Huafeng Reclamation Company. Shanghai Liu Jingde, Rudong Zhou Fengli Baiying and others jointly established Yichang Fuji Company. At this point, for example, abandoned stoves in Rudong coastal areas have been reclaimed to grow grain and cotton, which have developed rapidly in the eastern and northern coastal beaches. A modern seawall line has also been formed from Wangyao Port to Liujiapuzi. At present, most coastal expressways are built along this line.

Third, build Rudong modern seawall.

Due to the limitation of historical conditions, the construction standard of the old seawall can not reach its due strength, height and thickness, and there is no scientific hydrological calculation and analysis. 1July, 949, the typhoon tide burst its banks, and more than 5,000 fishermen and salt people in Beikan Town were seriously affected, resulting in seawater intrusion. 195 1 year, Rudong county people's government set up the Laobeikan levee with a length of 7 kilometers, which led to the upsurge of reclamation and dike construction in Rudong in modern times. According to statistics, from 195 1 to 2007, Rudong people successively carried out 18 large-scale reclamation and embankment construction. After more than 50 years of ups and downs, these dikes have ensured the safety of millions of people in Rudong, leaving an indelible record in history. Successive veteran comrades have inherited the glorious tradition of ancestors fighting for land by sea, and generations of scientific and technological workers have come from the wind.

4. The seawall construction of Yangkou Port has created a precedent for high-tech seawall construction.

In 2003, as the key project of Jiangsu coastal development strategy, Yangkou Port was officially started. In order to cooperate with the hinterland of the port, Bao Hua Group, the infrastructure investor of Yangkou Port, has successively invested RMB 65,438+0.10.00 billion to build the second phase of Xiaoyangkou Yangbei Dike and the 8 km seawall of Changsha Town Beikan Bund Lingang Industrial Zone. In order to ensure the industrial safety near the port, the construction unit has carefully demonstrated, designed and constructed the stability of the dike body and environmental protection, and its construction standard has reached once in a hundred years, and its protection standard is a leap in the history of dike construction. With the success of the artificial island dike in Yangkou Port, we believe that the coastal dike in Rudong will enter a faster, higher and better stage in the future.