Battambang, Cambodia
City population: 119251
Duration: 2015 – unknown
Implementation status: In piloting stage
Scale: Meso-scale: Regional, metropolitan and urban level
Project area: unknown
Type of area: Other
Last updated: October 2021

Battambang is projected to experience significant effects of climate change that will have a range of impacts including changes to hydrology and the frequency and intensity of flooding and droughts. As part of an Asian Development Bank project, a technical Climate Change Core Group was established to ensure that representatives from key sectors and levels of government work together to build resilience for the town and prepare the residents for the inevitable climate change impacts in the future. Three infrastructure systems in Battambang were identified for detailed vulnerability assessments and adaptation planning by the climate change Core Group; a) a long canal system to the west of the town, b) the riverbanks near the Sor Kheng Bridge in the centre of town, c) the train station and surrounding wetlands and settlements in the centre of town. [1, 2]

Battambang Case Study areas
ADB. 2015. Building Urban Resilience in Battambang, Cambodia, Volume 5 of the Resource Kit for Building Resilience and Sustainability in Mekong Towns, Prepared by ICEM – International Centre for Environmental Management for the Asian Development Bank and Nordic Development Fund. Manila (TA 8186).

Overview

Nature-based solution

  • Parks and urban forests
  • Green corridors and green belts
  • Blue infrastructure
  • Rivers/streams/canals/estuaries
  • Wetlands/bogs/fens/marshes

Key challenges

  • Climate action for adaptation, resilience and mitigation (SDG 13)
  • Climate change adaptation
  • Water management (SDG 6)
  • Flood protection
  • Stormwater and rainfall management and storage
  • Green space, habitats and biodiversity (SDG 15)
  • Green space creation and/or management
  • Health and well-being (SDG 3)
  • Creation of opportunities for relaxation and recreation

Focus

Creation of new green areas, Management of rivers and other blue areas

Project objectives

1. Revising the town development mission, identify climate change hotspots, identify development controls and safeguards. 2. To create a green belt for the town that can be used for a variety of purposes. 3. To create natural stormwater and flood management, bio-retention and pollution treatment. 4. To develop the river embankment to be multipurpose where people can interact and socialise with each other and is resilient to flood and erosion through the application of bioengineering approaches for infrastructure development [1, 2]

Implementation activities

1. Documenting past extreme events and regular flooding through participatory mapping with detailed information for various flood zones on duration, depth and source – localised rainfall and/or river overtopping. 2. Defining the climate change profile for the site based on modelling results from ICEM and supper imposing those on the past extremes map. 3. Revising the past extremes map to identify the town climate change hot spots. 4. Creation of bioengineered terraces with each level (above and below river bridge) serving different purposes of recreation and leisure, commercial and subsistence uses and stepwise flood protection. 5. Establish a tiered series of benches on both sides of the river using a mix of hard and soft bioengineering to protect against bank erosion and to facilitate multiple uses of the banks and river including access for recreation, tourism, fisheries and agriculture. 6. Tree plantation and creation of public green space areas including small parks. [1, 2]

Climate-focused activities

Climate change adaptation:

  • Restore wetlands and/or coastal ecosystems to dissipate the effects of flooding and/or storms
  • Renaturalization of rivers and other water bodies

Main beneficiaries

  • Local government/Municipality
  • Citizens or community groups

Governance

Management set-up

  • Co-governance with government and non-government actors

Type of initiating organisation

  • Multilateral organisation
  • Local government/municipality

Participatory approaches/ community involvement

  • Consultation (e.g. workshop, surveys)

Details on the roles of the organisations involved in the project

The project is led by the Asian Development Bank, the Battambang Core Group, which includes the Provincial Governor, line department and senior town officials. [1, 2]

Project implemented in response to ...

... an EU policy or strategy? No
... a national policy or strategy? Yes ( National policy on climate change adaptation [2])
... a local policy or strategy? Yes (The Battambang Development Master Plan (2008-2020) [2])

Financing

Total cost

Unknown

Source(s) of funding

  • Multilateral funds (e.g. EBRD, Worldbank)

Type of funding

  • Direct funding or subsidy

Non-financial contribution

Unknown

Impacts and Monitoring

Environmental impacts

  • Environmental quality
  • Improved soil quality
  • Water management and blue areas
  • Improved water quality
  • Increased protection against flooding
  • Improved stormwater management
  • Green space and habitat
  • Increased green space area
  • Increased conversion of degraded land or soil

Economic impacts

  • Stimulate development in deprived areas
  • Reduce financial cost for urban management

Socio-cultural impacts

  • Safety
  • Improved community safety to climate-related hazards
  • Social justice and cohesion
  • Improved access to urban green space
  • Health and wellbeing
  • Gain in activities for recreation and exercise

Type of reported impacts

Expected impacts

Presence of formal monitoring system

Unknown

Presence of indicators used in reporting

No evidence in public records

Presence of monitoring/ evaluation reports

No evidence in public records

Availability of a web-based monitoring tool

No evidence in public records

References

Bioengineering adaptation method
ADB. 2015. Building Urban Resilience in Battambang, Cambodia, Volume 5 of the Resource Kit for Building Resilience and Sustainability in Mekong Towns, Prepared by ICEM – International Centre for Environmental Management for the Asian Development Bank and Nordic Development Fund. Manila (TA 8186).
Battambang canal system
ADB. 2015. Building Urban Resilience in Battambang, Cambodia, Volume 5 of the Resource Kit for Building Resilience and Sustainability in Mekong Towns, Prepared by ICEM – International Centre for Environmental Management for the Asian Development Bank and Nordic Development Fund. Manila (TA 8186).
Battambang adaptation planning
ADB. 2015. Building Urban Resilience in Battambang, Cambodia, Volume 5 of the Resource Kit for Building Resilience and Sustainability in Mekong Towns, Prepared by ICEM – International Centre for Environmental Management for the Asian Development Bank and Nordic Development Fund. Manila (TA 8186).
Information about this nature-based solution was collected as part of the UNA global extension project funded by the British Academy.