Drainage Services Department

SDEV’s Blog: A Sustainable River Works – Yuen Long Bypass Floodway

19 September 2021

The Secretary for Development, Mr Michael WONG Wai-lun, invited DSD Engineer, Mr Patrick NG Yat-fei, to introduce the Yuen Long Bypass Floodway and the engineered wetland at the downstream of the Yuen Long Bypass Floodway.

The 3.8 km Yuen Long Bypass Floodway was completed in 2006. Mr NG said the engineered channel could intercept 40 per cent of the runoff in the Yuen Long Catchment, directly discharge to downstream of Kam Tin River, bypassing the Yuen Long Nullah in the Yuen Long town. The flooding risk of Yuen Long town and surrounding villages is therefore greatly reduced.

The DSD also constructed a 7-hectare engineered wetland near the downstream of the Yuen Long Bypass Floodway. Mr NG pointed out that the engineered wetland provided a good habitat for different wildlife, encouraging biodiversity.

The DSD has been promoting river conservation proactively by arranging guided tours to the Yuen Long Bypass Floodway. Interested public can visit the DSD’s website for details. Please visit here for Application Procedures and Note to Application

The article has been published on “My Blog” of Development Bureau’s website. To view the article, please click the link below (Chinese only):

https://www.devb.gov.hk/en/home/my_blog/index_id_461.html

Mr Patrick NG Yat-fei, DSD Engineer, said that Yuen Long Bypass Floodway had effectively reduced flood risk of Yuen Long Town

Mr Patrick NG Yat-fei, DSD Engineer, said that Yuen Long Bypass Floodway had effectively reduced flood risk of Yuen Long Town

Low flow pumping station and inflatable dam are installed at the downstream end to control the water level of the Bypass Floodway and to prevent river water from flowing back into the Bypass Floodway

Low flow pumping station and inflatable dam are installed at the downstream end to control the water level of the Bypass Floodway and to prevent river water from flowing back into the Bypass Floodway

DSD constructed a 7-hectare engineered wetland near the downstream of Yuen Long Bypass Floodway to promote biodiversity

DSD constructed a 7-hectare engineered wetland near the downstream of Yuen Long Bypass Floodway to promote biodiversity

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