On July 29th 14: 30, Beijing started the south flood diversion, which diverted the flood from the south moat to Liangshui River through the flood diversion sluice, thus reducing the pressure of urban flood control. This afternoon, the reporter visited the site of the flood diversion sluice of Liangshui River in Beijing, and saw that the flood diversion channel was in a rapid flow, but it did not reach the warning line, and the channel was in the process of normal flood discharge.

It is understood that the overall principle of flood control and drainage in Beijing urban area is "west storage, east drainage and north-south flood diversion", and "south flood diversion" refers to the diversion of flood from the south moat to Liangshui River through flood diversion sluice at You 'anmen. Liangshui River undertakes the task of drainage in the south of the city and flood diversion in the south of the central city, and is the main flood discharge channel in the city. As an important facility of "south flood diversion", flood diversion sluice is managed by Liangshui River Management Office and jointly dispatched with urban rivers and lakes Management Office.

General situation of Liangshui River:

Liangshui River is located in the south of Beijing, belonging to the North Canal system. It originated from Shuitou Village in the east of Lugouqiao Township, Fengtai District (also known as Houniwa Village), and flows southeast through Wanquan Temple, Dahongmen, Majuqiao, Secondary Canal, Taihu Lake, Dadushe, Niubaotun, Zhangjiawan, Shexian and other areas, and enters the North Canal, with a total length of 58 kilometers ("Tongxian Water Conservancy Records" is recorded as 58 kilometers

The rivers in the east of Yongding River in Fengtai District, such as Lianhua River, Fengcao River, Machao River, Ganhe River and Xiaolong River, all flow into Liangshui River. In the 1950s, there were still springs flowing here, but later, due to the construction of waterworks nearby, the construction of reservoirs in the upper reaches of Yongding River, and the cut-off of water below Shijingshan, the water source dried up.

After treatment, the Lotus River, which originated in the Lotus Pond, broke away from the south moat and merged into Liangshui River. The starting point of Liangshui River was changed to Wanquansi Railway Bridge, and the Lotus Pond became the new birthplace of Liangshui River. It flows through Shijingshan District, Fengtai District, Chaoyang District, Daxing District and Tongzhou District, with a total length of 68.4 1 km.