What is special about Tianjin's flood discharge? River Defense | Tidal Lock | Reporter
Since the occurrence of the "23.7" catastrophic flood in the Haihe River Basin, Tianjin, located at the downstream of the Haihe River Basin, is facing a severe and complex situation of flood control and discharge.
So, what's special about Tianjin's flood discharge? Many netizens raised some concerns, and the reporter interviewed relevant professionals from the Haihe Water Conservancy Commission of the Ministry of Water Resources to answer them.
This is a drone shot of Daqing River and Dibei Village on the afternoon of August 6th. Photo by Xinhua News Agency reporter Sun Fanyue
Netizen: Why do floods in the Haihe River Basin mainly enter the sea from Tianjin?
![What is special about Tianjin's flood discharge? River Defense | Tidal Lock | Reporter](https://a5qu.com/upload/images/671c72f2580814696ab132cf9d4ffb66.jpg)
According to flood monitoring reports, from July 27th to August 14th alone, Tianjin City has received a total of 2.92 billion cubic meters of upstream floods and discharged 2.444 billion cubic meters into the sea. It is expected that more than 1.2 billion cubic meters of floods will enter the country in the future.
Netizen: After multiple floods reach Tianjin, do they all flow into the sea from the main stream of the Haihe River?
In 1963, after a rare flood disaster occurred in the Haihe River Basin, through vigorous governance, backbone rivers such as Ziyaxin River, Duliujian River, and Yongdingxin River were excavated and expanded, gradually forming a flood control pattern of "diversion into the sea and zoning defense" in various river systems. This enabled a relatively complete flood control system to be formed in the lower reaches of the Haihe River, especially in Tianjin, and overall, floods could flow around the urban area of Tianjin.
On the north side of Tianjin city, there are Yongding New River, Chaobai New River, etc., and on the south side, there are Duliujian River, Ziya New River, etc. These rivers have all played a role in ensuring that the main river systems in the Haihe River Basin can flow into the sea. In principle, during this flood discharge process, the flood in the direction of Yongding River flows into the sea from the Yongding New River channel, the flood in the direction of Daqing River flows into the sea from the Duliujian River channel, and the flood in the direction of Ziyaxin River flows into the sea from the Ziyaxin River channel.
![What is special about Tianjin's flood discharge? River Defense | Tidal Lock | Reporter](https://a5qu.com/upload/images/acc634aab519c3eab7bff49d7c76449d.jpg)
The South Sluice of Duliujian River in Tianjin, captured on August 2nd. Photo by Xinhua News Agency reporter Sun Fanyue
Netizen: Why can't the moisture-proof gate "just open"?
Taking the Duliujian River moisture-proof gate as an example, Xing Jun, Director of the Duliujian River moisture-proof gate management department of the Haihe Lower Reaches Management Bureau of the Ministry of Water Resources, said that the Duliujian River moisture-proof gate, as the main channel for entering the sea in the Daqing River system of the Haihe River Basin, is also affected by the tidal support of the sea. When the tide rises, close the gate in a timely manner to prevent the tide from flowing back. When the tide recedes, open the 22 hole gate in a timely manner to fully discharge the flood of the Daqing River system into the sea.
Xing Jun stated that during the "23.7" catastrophic flood in the Haihe River basin, the management office of the Duliu Jianhe moisture-proof gate continuously observed the water level changes on both sides of the gate 24 hours a day, and implemented precise control of the water gate based on the tide level. The gate was lifted to release floodwater, and the opening time of the gate was extended as much as possible, the water level of the river was lowered, and the upstream flood was fully released.
![What is special about Tianjin's flood discharge? River Defense | Tidal Lock | Reporter](https://a5qu.com/upload/images/c2083ea87270d27b1e387830da6d54fa.jpg)
Final review: An Tao
New Media Center of Xinhua News Agency
Xinhua News Agency Tianjin Branch
Co-presented by
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