Affected by global warming, storm surges and wind waves under extreme weather and climate change pose a threat to low-lying or windy locations along the coast.
The Civil Engineering and Development Department today (7th) announced the "Research on Coastal Hazards under Climate Change and Extreme Weather and Formulation of Improvement Measures - Feasibility Study". The authority identified 26 high-risk residential areas in Hong Kong, except those located on the coast. Heng Fa Village, South Horizons and San Mun Tsai New Village in Tai Po, as well as low-lying areas along the central and northwestern coasts of Yuen Long.
According to the CED, the improvement works include adding or raising wave retaining walls at coastal locations, adding water retaining facilities at suitable locations behind the coastal locations to stop the influx of seawater into the inland, and installing removable barriers in front of buildings Water boards, etc., are planned to be implemented in an orderly manner in the next five years.
▼2018 super typhoon "Mangkhut" hit Hong Kong▼
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In 2017 and 2018, Hong Kong was hit by Super Typhoon Hato and Mangkhut successively. The resulting storm surges and waves caused serious damage to some coastal areas.
In April 2019, the CERD commissioned AECOM as a consultant to launch the "Coastal Hazard Study", which comprehensively reviewed the low-lying and windy locations along the coast of Hong Kong, and analyzed the impact of storm surges and waves on the relevant areas under extreme weather. influence.
The study analyzes the existing seawalls with potential coastal risks. Structurally, they are generally able to withstand extreme weather that occurs once in 100 years. However, considering the extreme weather conditions predicted by 2050, there are still three potential coastal risks, including "crossing the dike". "Waves" caused coastal seawater inundation and damage to coastal pavements, as well as seawater inundation in low-lying areas.
Yuen Long city center is also listed as a high-risk area
The study focused on 26 low-lying or typhoon residential areas along the coast that are more likely to be affected by high potential risks in Hong Kong, except for Xing Fa Village, South Horizons, Tai O, Lei Yue Mun (Ma Wan Village, San Ka Village), etc., Kennedy Town, Sai Ying Pun and Sheung Wan are also on the list; low-lying areas in central Yuen Long (Tai Jing Wai, Chung Hau Fisherman New Village, Shan Pui Village, Wang Chau, Yuen Long City Center); Northwest Yuen Long Low-lying areas along the coast (Shaqiao Village, Hucao Village, Liufushan, Kengkou Village, Shangbaini, Xiabaini), etc.
The study suggests that in the relevant areas, building or raising a wave retaining wall, installing water retaining facilities behind the coastal location, or installing a removable water retaining plate in front of the residential buildings.
▼On October 12, 2021, the compass hit Xinghua Village and ushered in a big wave▼
In addition, relevant government departments have formulated early warning systems and contingency arrangements in individual areas for dealing with extreme weather, including emergency response measures such as notifying affected people, opening temporary shelters, providing sandbags and assisting evacuation.
Due to the implementation of relevant improvement measures, it is necessary to coordinate and handle the required statutory procedures with stakeholders.
CEDD expects that the improvement measures proposed in the study can be implemented in phases over a five-year period to mitigate coastal risks in existing residential areas identified.
▼On October 13, 2021, under the typhoon signal No. 8, Li Yuemen was damaged by wind and rain▼
The Observatory expects tropical cyclones to be more likely to be affected by strong winds and prolonged rainstorms. It is hoped to strengthen the forecast. The Observatory expects 5 to 8 tropical cyclones to hit Hong Kong this year, or the monsoon season will end after October, or the storm surge of super typhoon Mangkhut may change to 1 in ten years. In the case of normal Yuen Long, North District or the hardest-hit areas, the Drainage Services Department has added 3 wave points that cross the embankment to monitor storm surges, including Heng Fa Village and South Horizons.
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