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CLIMATE AND DISASTER RESILIENCE

Prioritization and drainage infrastructure investments in the North-South Plain of the Urban Municipality of Antananarivo

MADAGASCAR

Antananarivo

2025 – 2026

Funding

World Bank

Recipient(s)

Ministry of Land Use Planning and Land Services

Assignee

BRL

Project summary

The project aims to strengthen flood resilience in the North–South Plain of the Urban Municipality of Antananarivo (CUA) by identifying and prioritizing investments in drainage infrastructure. Building on the most recent Drainage Master Plan (SDA), it seeks to inform decision-making for the second phase of the World Bank–funded PRODUIR project, in a context of rapid urbanization and increasing vulnerability to hydrological hazards.

The project draws on a comprehensive review of key planning documents (PUDi, PUDé, and SDA) to develop an integrated understanding of urban flood management interventions. It establishes an investment prioritization framework based on objective criteria, including risk levels, exposure of populations and assets, technical feasibility, budget constraints, and expected hydraulic performance. The analysis covers the entire drainage system of the plain, including primary canals, secondary and tertiary networks, retention basins, and existing and planned pumping stations.

By structuring investment options within a coherent and prioritized framework, the project supports robust and sustainable decision-making. It contributes to informed dialogue between local stakeholders and technical and financial partners, and to the implementation of a more efficient and resilient urban drainage strategy.

Tasks carried out by Ecoresil

Flood risk assessment through the integration of hazard data and the analysis of population exposure, socio-economic vulnerability, and asset damage

Development of spatial risk indicators, both event-based and on an average annual basis, across multiple scales of analysis

Prioritization of intervention areas and strategies using cost-benefit and multi-criteria analyses, incorporating stakeholder preferences and sensitivity testing

Design of an interactive dashboard (Resiscan) to visualize, explore, and leverage the results

Our references

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