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Longtan West Lake Park builds a storage tank at the bottom of the lake, which can store 60,000 cubic meters of rainwater

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According to a reporter from Beijing Daily from Beijing Drainage Group, the Longtan West Lake storage project has officially resumed. A 62,000 cubic meter storage tank will be added to the bottom of the Longtan West Lake to improve the water quality of the Longtan West Lake section and cut peaks in the surrounding areas during the flood season. The role of regulation and storage, and Longtan West Lake Park due to engineering reasons will be opened in the second half of next year.

Longtan Lake was originally a kiln pit left by the Ming Dynasty. In the early 1950s, it was renovated into 3 artificial lakes. At that time, it mainly assumed the functions of flood control and storage in Longxugou, Jinyuchi, and Qianmen. In the 1980s, Longtan Park, Beijing Amusement Park, and Longtan West Lake Park were successively built. Longtan West Lake is located in Longtan West Lake Park. The lake area is 5.15 hectares, with a volume of about 90,000 cubic meters. It bears the rainwater retention function of more than 200 hectares in the southern part of Dongcheng.
“If the rainwater is excessive during the flood season, the sewage from the overflow square gully of Longtan Road may overflow into the lake, causing substandard water quality, especially in hot summer, there will be odors.” The relevant person in charge of Beijing Drainage Group Infrastructure Branch Company told Reporter, the construction staff is currently dredging the bottom of the lake. Due to years of untreated, there is a lot of silt on the bottom of the lake.

In order to comprehensively improve the water quality of Longtan West Lake and carry out peak reduction and storage for the surrounding area, Beijing Drainage Group coordinated the relevant departments to start the Longtan West Lake storage project. It plans to build a 62,000 cubic meter storage tank at the bottom of Longtan West Lake. The water in the square ditch first enters the storage tank, and after filtering treatment, the water quality reaches the standard and then returns to the lake.
“The storage tank has been built in many places in the central city, and it was the first in Beijing at the bottom of the lake.” According to the person in charge, since the first attempt was made to build a pool at the bottom of the lake, the structure and pressure capacity of the storage tank need to be carefully designed . The storage tank is filled with a honeycomb silica sand purification system. The structure of the honeycomb and the characteristics of the silica sand material are used to purify the water. In addition, a special layer of breathable and impervious material will be laid at the bottom of the pool to allow the water at the bottom of the pool to “breathe.”
According to the construction plan, after the lake bottom is dredged, the construction of the storage tank will begin. After the storage tank is built, the original elevation and appearance of the lake bottom and the lake surface will be restored. The main project is expected to be completed by the end of this year, and Longtan West Lake Park is expected to resume opening in the second half of next year.

Source: Beijing Daily Client | Reporter Ye Xiaoyan

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