Mott MacDonald has been appointed by the Hong Kong Special Administrative Region’s Drainage Services Department (DSD) to improve drainage in the North District of the New Territories.
In 2011 Mott MacDonald completed a drainage master plan (DMP) review study for DSD which identified that drainage improvement works were required to meet the required flood protection levels. This took into consideration the latest land use changes and potential future developments.
Mott MacDonald will now establish 1D river/pipeline and 2D fine-grid ground models for seven locations – Hang Tau, Lok Ma Chau Tsuen, Shek Kiu Tau, Ha Wan Tsuen, Kong Ha and Sha Tau Kok Town, Lower Ping Yuen River and San Tin Eastern Main Channel. The company will also undertake adoptive reviews, surveys, investigations, option appraisals, impact assessments, preliminary engineering, landscaping and greening design, as well as hold public consultations.
Sai Ching, Mott MacDonald’s project director, said: “Our previous DMP review took into account various factors, such as sedimentation at the downstream of main channels, mangrove growth at river estuaries, updated extreme rainfall and sea level statistics and mean sea level rise due to climate change. Drawing on our past experiences of the project will help us provide innovative drainage improvement solutions in the near future.”
“Using a 2D grid model to generate the overland flow will give a better description of flooding in terms of extent and duration,” Sai added.
Mott MacDonald’s commission is due to be completed in the second half of 2017.