SINGAPORE, PULAU TEKONG

Fig 3. Map of Mangroves in Pulau Tekong in 2016 ⁹⁷

Location: Southeast Asia, Singapore
Planning Area: North-Eastern Islands
Area: 25-km²
Year: 2010

Objectives:

The works must have no or minimal impact on the environment.

  • Arrest erosion

  • Restore mangrove areas

  • Test-bed a hybrid of soft engineering solutions that could be used for other eroding shores ⁹⁸

  • Housing Development Board of Singapore (HDB)

    National Parks Board (NParks)

  • Housing Development Board of Singapore (HDB)
    This issue was brought to the attention of HDB, who helmed this project. HDB called for several tenders; engaging:

    1. Uvaria Tide

    2. DHI Water & Environment

    3. Surbana International Consultants Pte Ltd

    4. KOON Construction & Transportation Pte Ltd

    5. Winrigo (S) Pte Ltd (contracted by KOON Construction & Transportation Pte Ltd)

  • Uvaria Tide
    The appointed company provides specialist consultancy services for mangrove nursery, growing and planting of mangrove saplings and mangrove ecology.

    • Mangrove Propagation.

    • Mangrove planting plan.

    • Worked alongside with Surbana International Consultants Pte Ltd to design the required structures.

    DHI Water & Environment
    DHI Water & Environment is a independent specialist international consulting research research organisation.

    • Modelling and hydroinformatic services.

    • Environment management services.

    • Marine and habitual services.

    Surbana International Consultants Pte Ltd
    Engineering consulting.

    • Planning and design.

    • Test-bed before full implementation.

  • Surbana International Consultants Pte LtdProject management and engineering consulting.

    • Preliminary project management.

    • Planning and design.

    • Contract and project management.

    • Test-bed before full implementation.

  • KOON Construction & Transportation Pte Ltd

    • Planting and equipment.

    • Precast concrete works.

    Winrigo (S) Pte Ltd

    Winrigo was contracted by KOON Construction & Transportation Pte Ltd to:

    • Supply biodegradable materials to be used in rehabilitation works.

    • Winrigo’s R3PLAS Technology

Rehabilitation Method

To stabilise the coastline and restore mangrove areas, they gathered a team with relevant expertise on coastal engineering works and mangroves from various agencies, and used a combination of hard and soft engineering solutions ⁹⁹

Fig 4. Mangrove Planting Design ⁹⁸

Environment Monitoring and Management Plan (EMMP)

Existing Mangroves ↔ Newly Planted Mangrove Saplings ↔ Natural Recruitments

Existing Mangrove Forest Monitoring¹⁰⁰

To investigate long-term ecological effects caused by possible unwanted hydrological change due to the implementation of the shoreline stabilisation structure.

Monitoring of newly planted mangrove saplings ¹⁰¹

To determine health condition and survival of different species of the newly planted mangroves over time and location across the project area.

  • 20 belt transects of fixed width set up.

  • Each transect monitored 9 times over 18 months

Monitoring of natural recruitment ¹⁰²

Develop an understanding of the patterns of recruitment of mangrove seedlings within the structure including species diversity, abundance and development stage in relation to vertical and horizontal distribution across the shoreline and natural phenological patterns for each mangrove species.

  • 12-month program of monitoring in 20 transects across the shoreline at 3 bathymetric levels