Civil Engineering and Development Department The Government of the Special Administrative Region

Port and Marine Services

New Blake Pier at Stanley

Sharp Island Pier at Sai Kung

Sai Kung Public Pier

CONSTRUCTION OF MARINE WORKS Apart from these, we commenced the reconstruction of Pak Kok Pier on in 2020, with a view to We design and construct various types of marine works, improving the berthing condition of the pier. including public piers, waterfront promenades and projects under the Pier Improvement Programme. We are also Other projects completed in the past few years include the conducting the feasibility study for the proposed construction of a riverwall at Yat Chung in Tai O, the improvement to/reconstruction of the Ferry seawall upgrading works for the Ma On Shan Promenade Pier. and the widening of Tung Wan Tau Road along Silver Mine Bay Beach in Mui Wo. We also carry out improvement works to some existing public piers and landing facilities.

In the past few years, we completed the construction or reconstruction of the following piers: • New Star Ferry Piers • Central Public Piers No. 9 and No. 10 • New Blake Pier at Stanley • Public Pier • Sai Kung Public Pier • Sharp Island Pier • Pier

Reconstruction of Sharp Island Pier

Tai O riverwall 2

CLIMATE CHANGE AND ITS IMPLICATIONS ON COASTAL STRUCTURES

The emission of greenhouse gases lead to rise in global temperature and mean sea level.

Extreme Sea Level

Storm Surge High Tide Normal High Tide Mean Sea Level Low Tide

Cyclone Storm Surge (Current situation)

Rise in sea level due to climate change in addition to cyclone storm surge may cause flooding in the coastal area Impact by storm surges and waves on coastal areas

Riding on the future climate change prediction and carbon (i) frequency analysis of extreme sea levels to review the extreme reduction targets in Fifth Assessment Report published by the sea levels taking into consideration the extreme storm surge Intergovernmental Panel on Climate Change (IPCC AR5) in brought by historic storm surge events before 1954 and typhoon 2014 and taking into consideration of the Paris Agreement signed events in 2018 with a view to updating the relevant design in 2016, we have updated the Port Works Design Manual in early standards against extreme weather; 2018 incorporating the increase in mean sea level rise up to end of the century. We will continue to review and update the relevant (ii) Projection of typhoon induced extreme winds in Hong Kong design standards as and when necessary in the future by making under climate change in the 21st century. The result will be reference to the latest climate change assessment reports and considered in a sensitivity check study of Hong Kong under the prevailing scientific reports. direct hit by a super typhoon. The study findings would provide reference for development of emergency preparedness measures We have commissioned a strategic study to identify the scope of for coastal critical infrastructures. enhancement works necessary for strengthening the resilience of existing government critical infrastructures. The study is To deal with storm surges and overtopping waves at coastal low- anticipated to complete in 2020. Taking into account the lying or windy locations, we have been conducting a territory- recommendations in the study, the relevant departments will wide coastal hazards study to review the coastal low-lying or consider required enhancement measures for their critical windy locations in Hong Kong, and to carry out investigations of infrastructures. storm surges and waves in order to assess the impacts of extreme weather on these locations. Taking into account the study We have been collaborating with the Hong Kong Observatory results, the Government will formulate appropriate protection (HKO) to carry out the following climate-change related studies: measures, including improvement works and management measures, to mitigate the impacts of extreme weather and climate change on the coastal low-lying or windy locations.

Kai Tak Cruise Terminal 3

ADVISORY SERVICES

We provide technical advice related to marine works including the examination of public and private development submissions and land use proposals which may affect marine facilities. We also operate hydraulic models of the Hong Kong Harbour and undertake regular reviews of the Port Works Design Manual.

MAINTENANCE OF MARINE FACILITIES

We maintain 109 beacons, 127 km of seawalls and breakwaters, and 323 piers and landings (including public piers, as well as franchised and licensed ferry piers). Patch repair at suspended deck of pier

We carry out routine inspections of marine facilities to ensure that they are safe for public use.

To fulfill the increasing demand for inspections of marine structures, we have introduced new advanced surveying technology including Imaging Sonar, Integrated Multibeam Echo Sounder and Laser Scanner System to assess the conditions of marine structures more effectively.

Integrated Multibeam Echo Sounder and Laser Scanner System

Completion Photo of Dolos placing at the end of Aberdeen Breakwater

Inspection of Seawall at Tai Kok Tsui by Integrated Multibeam Echo Sounder and Laser Scanner System

If the facilities are found in need of repair, we will arrange maintenance works, including concrete repair, fender repair and upgrading, and protective coating works to the marine facilities. To minimise disruption to ferry services and inconvenience to the public, we provide temporary berths or carry out the maintenance works after peak hours to maintain their operation.

In 2018, the attack of super typhoon Mangkhut in Hong Kong caused different levels of damage to some seawalls, breakwaters and piers at windy locations. Most of the damages were not significant, and we swiftly completed the relevant repair works. 4

Upgrading of hardwood timber fenders to plastic or rubber Currently, we are revamping the PMIS aiming to develop a fenders for marine facilities is in progress. This initiative BIM-compatible asset management system for marine not only enhances the durability of the fenders, but is also facilities with a view to organising the maintenance more environmentally friendly. inspections and associated repair records more systematically and enhancing our maintenance strategy for marine facilities through analysing massive data collected.

MAINTENANCE DREDGING

We carry out regular maintenance dredging of fairways, anchorage areas, typhoon shelters, public cargo working areas and major river outlets to ensure navigation safety. Major maintenance dredging works have been carried out in Tai O Approach Channel, Western Dangerous Goods Anchorage, Tuen Mun Public Cargo Working Areas, Tuen Mun Typhoon Shelter, Tsui Ping Nullah, Shing Mun River and Tuen Mun River in recent years.

Fender repair works at pier During our dredging works, we work closely with the Marine Department and the Environmental Protection The Port Maintenance Information System (PMIS) has Department to mitigate the marine traffic and environmental been implemented to cope with the growing demand for impacts. The dredged material will be disposed of at storage and prompt retrieval of information on the approved disposal sites for open sea disposal or confined increasing number of marine structures we maintained. marine disposal according to its contamination level. The PMIS is a computerised database with all the essential history and records of individual marine structures. It The annual expenditure for maintenance of marine enables us to respond to enquiries quickly and facilitates facilities and dredging is about $85 million. our planning, prioritisation and scheduling of maintenance works. The inspection and maintenance process is also streamlined by the use of equipment compatible with the PMIS, which allows our staff to efficiently carry out regular inspections and immediately prepare works orders for the necessary maintenance works in the fi e l d .

聯絡我們 Contact Us 香港九龍何文田公主道 101 號 地址 土木工程拓展署大樓 1 樓 Address : 1/F, Civil Engineering and Development Building, 101 Princess Margaret Road, Homantin, Kowloon, Hong Kong

電話 : (852) 2762 5111 Telephone 電郵 : [email protected] E-mail 網址 : http://www.cedd.gov.hk Maintenance dredging Website

August 2020