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Good practice Imported

Vaisigano River Integrated Flood Management — Ecosystem-Based Catchment Resilience (Samoa)

Samoa · Apia · See the Samoa profile · See the Apia profile

Evidence: Descriptive / self-reported Top 76% 33/100 · Ask Evidence Copilot about this practice

Samoa's government, backed by a US$57.7M Green Climate Fund grant (US$65.7M total), is upgrading riverworks and drainage across the Vaisigano catchment through the capital Apia, aiming to protect about 37,000 people from recurrent flooding by 2025.

US$65.7M
Total programme funding
US$57.7M
GCF grant
~37,000
People expected to gain flood resilience
49%
Programme disbursement
Vaisigano River Integrated Flood Management — Ecosystem-Based Catchment Resilience (Samoa)

Details

Maturity
Scaling
Promoter
Government of Samoa – Ministry of Natural Resources and Environment, with the Green Climate Fund
Period
2017–2025
Keywords
water management, disaster risk reduction, climate adaptation

Context

Apia, Samoa's capital and only city, sits at the mouth of the short, steep Vaisigano River catchment that floods rapidly during cyclones, most destructively in December 2012 when Cyclone Evan killed several people and damaged much of the city centre.

Activities

Samoa's Ministry of Natural Resources and Environment secured Green Climate Fund approval in December 2016 for a US$65.7M programme (US$57.7M GCF grant plus US$8M co-financing) combining catchment-scale riverworks, upgraded downstream drainage, integrated land-use and flood-risk planning, community capacity-strengthening, and ecosystem-based measures; implementation began July 2017 and is scheduled through January 2025, with a 25-year overall resilience-maintenance horizon.

Results

As of the latest public GCF reporting, the programme was 49% disbursed, with roughly 37,000 people expected to gain increased flood resilience; itemised riverworks completed and ecosystem-based biodiversity/carbon outcomes are not yet published.

Implementation
Indicative cost
High (€500k–€5M)
Time to results
Long (> 3 years)
Staffing & skills
Government of Samoa Ministry of Natural Resources and Environment, UNDP implementing support

Conditions for success

  • Combines hard infrastructure (riverworks, drainage) with land-use/flood-risk planning and ecosystem-based measures rather than infrastructure alone
  • 25-year project lifespan designed explicitly to maintain resilience gains beyond initial construction

Commonly funded by

National / regional programmes

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Data sources

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