Busan is good

Busan Metropolitan City Completes Installation of Sewage and Rainwater Separation Wall in Bujeon Stream… Clear Water from Seongjigok Now Directly Flowing into Dongcheon Stream

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Busan Metropolitan City (Mayor Park Heong-joon) announced that approximately 7,000 tons of clear water per day (about 2.55 million tons annually) from the Seongjigok Reservoir is now flowing directly into Dongcheon Stream through the installation of a sewage and rainwater separation wall in the covered section of Bujeon Stream.

The construction covered a 1.7-kilometer section of the covered stream between Citizens Park in Busanjin-gu and Gwangmu Bridge, where separation walls with a total length of 3.5 kilometers were installed on both sides. In addition, four sand traps and two weirs, which had been the main causes of foul odors and water pollution, were removed to improve water flow.

The project began on October 31 last year and is scheduled for completion on September 15 of this year.

Previously, the valley water from the Seongjigok Reservoir entered the covered box of Bujeon Stream, where it mixed with domestic sewage and non-point pollution sources, and was entirely directed to wastewater treatment facilities. With this project, the system has been restructured to separate clean valley water from sewage, completing a system that allows clean water to flow directly into Dongcheon Stream.

In the past, the valley water flowing into Bujeon Stream mixed with sewage and was directed to wastewater treatment plants, placing an unnecessary burden on the facilities. Sediment accumulated in sand traps was also a cause of foul odors and water pollution. Through this project, these structural issues have been resolved by separating clean water from sewage, establishing a system in which water from the Seongjigok Reservoir can now flow directly into Dongcheon Stream without wastewater treatment.

This project is expected to enhance the self-purification capacity of urban streams and improve water quality by supplementing water flow with the valley water from Seongjigok.

Furthermore, by reducing the volume of unidentified water entering wastewater treatment plants, treatment efficiency will increase and operational costs are expected to decrease.

Building on this achievement, the city will continue to inspect sewage facilities not only in Bujeon Stream but also in other tributaries connected to Dongcheon Stream. Additional separation walls will be installed in sections where needed.

Lee Byeong-seok, Director General of the Environmental Water Policy Office, stated, “With clear water from Seongjigok once again flowing into Dongcheon Stream, we expect significant improvements in the water quality of urban streams. Our city will continue to make every effort to improve water quality so that Dongcheon Stream can become a clean and healthy river, as well as a comfortable space for citizens to enjoy.”