The most important water conservancy projects in the Five Dynasties should be recommended to the seawall built during the Qianli period of King Wu Yue. It is located outside Houchaomen in Hangzhou, which is now from Liuhe Tower to Genshanmen in Hangzhou, and is a section of bambo

In the fifth year of Xiangfu in Dazhong, Song Dynasty (1012), the transport envoy of Liangzhe Zhejiang, Chen Yaozuo and the Tongzhi Hangzhou Qi Lun introduced the Yellow River river engineering technology into the seawall project to build a firewood pond, that is, one layer of firewood and another layer of soil, and each other was built. Although this kind of seawall saves labor and improves impact resistance, it consumes too much firewood and is prone to decay and needs maintenance every year. Later it further developed into Shitang. During the Jingyou period (1034-1038), Zhang Xia, a transferee from Liangzhe, built a stone dike of 12 miles, from Liuhe Tower to Dongqingmen . In the fourth year of Qingli (1044), Tian Yu, the transferee of the transferee in charge of Hangzhou, continued to repair 2,200 meters on the basis of the original stone dike.

In terms of the strategy of governing Taihu , Fan Zhongyan , Jialian , Jiaqiao, Shan E, Zhao Lin, Huang Zhen, Su Shi and others have all put forward their own opinions, and the most representative ones are Fan Zhongyan and Shan E.

Fan Zhongyan (989-1052) has rich experience in water control and has built a seawall in northern Jiangsu. From the second to the sixth year of Tiansheng (1024-1028), it was built into Dehaiwei 150 miles, which later generations called Fan Gongdi . He has a good understanding of the situation in Taihu Lake. During the Jingyou period (1034-1038), he presided over the work of dredging the port and pu. In terms of strategy of managing Taihu Lake, he believes that engineering measures that combine river dredging, dike repair and gate establishment should be adopted to combine harm removal and profit promotion, and take into account both storage and leakage, which is beneficial to agricultural production. Shan E wrote "Wuzhong Water Conservancy Book", which analyzed the floods of Taihu Lake and believed that there are three causes of floods of Taihu Lake. Regarding the cause of floods, he advocated that Wujiangtang Road should be opened first to manage Taihu Lake, so that the water would be drained before building reclaimed fields. Single-sided emphasis on the importance of excreting Yixing floods, so as to counteract harm removal and profit promotion, which is obviously not feasible.

In terms of farmland water conservancy, Song Xining (1068-1077) Wang Anshi When he was in power, he promoted farmland water conservancy. The north has used river silt and sand to release silt fields, and has achieved great achievements. This is the only time in Chinese history that silt **. The rivers involved include the Yellow River, Bian River , Weishui River , Beiluo River , Zhanghe , Minghe , Hutuo River , Hulu River , etc., as well as mountain streams. It is distributed in today's provinces such as Shanxi, Shaanxi, Henan, and Hebei. silted fields has nearly 7 million mu, and the scale is quite large.

Northern Song Although he spent a lot of financial resources to manage the Yellow River, he did not achieve much results due to the poor management policy. The main policies of river management proposed by the Song people were: (1) The theory of wide river flowing slowly and remote embankment to get water. Yao Zhongsun put forward a systematic view in the first year of Qingli (1041). The disadvantage of this theory is that it only focuses on water and ignores sand. Therefore, it not only cannot alleviate river disasters, but also aggravates the disasters. (2) The whole river diversion theory. Representative figure Li Chui proposed a series of suggestions for water division in the fifth year of Dazhong Xiangfu (1012). This theory is the same as the theory of wide rivers flowing slowly. It only focuses on water and ignores sand, and the result is the same as the previous theory. (3) Local water reduction theory. This statement is more complicated and cannot be generalized. Generally speaking, as a temporary water distribution measure, it has a certain effect. However, as a regular policy of river control, it is harmful but not beneficial to divert the flow everywhere. (4) Let the popular saying. This is a negative policy. (5) Theory of diminishing rivers and reducing silt. Focusing on mud and sand, but it is not easy to take action.

In the late fifth dynasty, , late Zhou started to build a canal network centered on Tokyo (now Kaifeng). The Northern Song Dynasty continued to rectify and expand transportation capacity. The canal centered on Tokyo in the Northern Song Dynasty was radial, forming an intricate and dense canal network. At the end of the Northern Song Dynasty, the Jin soldiers attacked the Song Dynasty, and the canal network connected in the north was destroyed. During the Southern Song Dynasty, the canal transport could only be maintained in a corner of the southeast, and several canals were dug between the two Zhejiang regions to form a small-scale southeast canal system.