Cover News Reporter Yan Wenwen Wu Deyu
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On April 28, 2022, the South Canal Control Lock of the Sinusi Hub Project in Dezhou, Shandong Province opened to release water, allowing the Grand Canal to open to water for the first time in a century. A year later, standing in the same place, Zhang Ruxu, secretary of the Party Committee of the Sinusi Hub Engineering Administration, still recalls this great feat with emotion.
Zhang Ruxu told reporters that the Grand Canal was like a highway in ancient times, and there were many prosperous cities on both sides, and the Sinusi Water Conservancy Project, which has been an important node of the Grand Canal since the Ming Dynasty, has undertaken an important role in ensuring the navigation of the canal.
Aerial view of the water conservancy hub of Shinenji Temple
Cover News: Could you please introduce the basic situation of the water conservancy hub of Shinenji Temple, and how important is it?
Zhang Ruxu: There are two rivers in the upper reaches of this basin under our management, one is the Zhanghe River and the other is the Wei River, and these two rivers converge in Xuwancang in Hebei Province, and then called the Wei Canal. The Wei Canal to the Sinusi hub is divided into three, one of which enters the temperance lock to Tianjin, called the South Canal, and then connects with the North Canal, which is an important part of the Beijing-Hangzhou Grand Canal; The middle one is called the Cha River, and the rightmost one is called the Minus River. The Cha River and the Minuhe River converge in Dawangpu, Wuqiao County, Hebei Province, and their main role is to divide floods. The hub of Sinuji Temple is the starting point of the South Canal, which can maintain the original style of the past, and it is also because the Sinuji Water Conservancy Project no longer assumes the role of the main flood discharge of the South Canal and retains the original ecological style.
Cover News: The history of the Sinu Temple Water Conservancy Hub has been very long, did it start to be built in the Ming Dynasty?
Zhang Ruxu: Yes, the Sinu Temple water conservancy hub was built on the basis of the Ming Dynasty Rolling Dam. The river reduction we see is a flood diversion river dug in 1490, during the Hongzhi period of the Ming Dynasty, the purpose of which is actually to serve the Grand Canal and ensure the transportation on the Grand Canal. The water is too large during the flood season, and the river needs to be divided to ensure that the water level of the Grand Canal is not too high; During the non-flood season, the river will no longer divide the water, ensuring that the Grand Canal can be navigated.
Cover News: What is the section of the Grand Canal that will be fully connected from 2022? Where does the water come from?
Zhang Ruxu: In the past hundred years, the whole line has been connected to water, and the whole line has been through, and the main one is this "South Canal". The canal south of the Yellow River has always been open, and the north of the Yellow River has been dry for a long time, and then it has stopped flowing. In 2022, the route from the South Canal to the North Canal will be through. The water source through this time is from the Yuecheng Reservoir in Handan, Hebei Province, through the Zhanghe River, with a water volume of about 91 million cubic meters. Others are channeled from the Liuwu River through inverted siphon projects. The source of water for the Liuwu River comes from the Yellow River and the Yangtze River. This inverted siphon project is three 4.6 meters × 4.6 meters square holes preset for Tianjin water transmission in 2010, passing through the riverbed, about 1.8 kilometers, passing through the Limin River, Minhe River, Cha River, and directly into the South Canal, which is also an important water source to ensure the full connection of the Beijing-Hangzhou Grand Canal.
Cover News: What is the inverted siphon project and how to use it in water conservancy?
Zhang Ruxu: Actually, it's the physical communicator principle. According to the principle of siphon, the communicator should be high in the middle and low on both sides, and inverted siphon is to turn the connector upside down, high on both sides and low in the middle, which can still play a role.
Zhang Ruxu briefed reporters on the situation of the water conservancy hub of Sinu Temple
Cover News: For the first time in a century, what is the significance of the full line for the Grand Canal?
Zhang Ruxu: There are several important significances: first, the ecological restoration of rivers and lakes, and second, the treatment of groundwater overextraction. Because there is water in the Grand Canal, the people's production water does not need to pump well water for irrigation, effectively replacing groundwater. Since last year, the groundwater level has risen by 1.33 meters within 5 kilometers of the replenishment channel along the Wei Canal. Today, wild ducks, cranes, gray herons, egrets and other animals appear in pieces, and there are more fish in the river. On the day of the replenishment in April this year, when the gate was opened, I saw fish and jumped very high.
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