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Problem: Southern Madagascar's "flood-drought" paradox cripples the regional economy.

 Action: NatureLEAD designed the Onilahy Watershed Initiative, using our "Sustainable Flywheel" blended finance model to sell watershed restoration as an investable commercial service. 

Outcomes: The model builds a powerful economic case for proactive investment, restoring the watershed to build systemic drought resilience and deliver a clear ROI. 

Lesson: Proactive investment in natural infrastructure is far more cost-effective than reactive crisis management.

Background

Southern Madagascar, particularly the Onilahy Watershed, is at the sharp end of a climate and land degradation crisis that manifests as a devastating "flood-drought" paradox. The region is not just arid; its entire hydrological system is broken.

The root cause of the problem is widespread deforestation and unsustainable agricultural practices in the upstream catchments. For decades, the loss of forest cover and soil health has destroyed the landscape's natural ability to function as a sponge.

The consequences are twofold and create a vicious cycle:

  1. Destructive Floods: During the rainy season, intense rainfall does not infiltrate the compacted, degraded soil. Instead, it results in massive surface runoff, causing flash floods that destroy crops, damage critical infrastructure (roads, bridges), and lead to the loss of life. These floods carry away millions of tons of precious topsoil, catastrophically eroding the region's agricultural base.
  2. Severe Droughts: Because the rainwater is not captured and stored in the landscape's soil and aquifers, the dry season is marked by extreme water scarcity. Rivers run dry, wells fail, and communities and agriculture face severe droughts. This, in turn, forces communities into more desperate and unsustainable land-use practices, accelerating the cycle of degradation.

This socio-hydrological crisis has crippled the regional economy. It undermines food security, threatens the water supply for urban centers, and creates a state of perpetual humanitarian crisis that requires costly, reactive emergency aid. The system persists because the traditional, grant-reliant conservation and development models have been too fragmented and slow to address this systemic, landscape-scale problem. There has been a critical lack of investable, high-performance delivery mechanisms capable of implementing a solution at the scale required.

Photo by Augustine Okoth

Actions taken

Recognizing this systemic failure, I took the leadership role in designing a new, integrated approach. After 15 years as a conservation leader, I founded NatureLEAD to build a high-performance delivery engine that could solve this problem. Our objective was to move beyond grant-dependency and create a financially self-sustaining and scalable model for drought resilience.

The primary action was the design of the Onilahy Watershed Initiative, a "shovel-ready" program built on two key innovative instruments:

  1. An Economic Business Case ("Watershed Resilience as a Service"): We reframed watershed restoration not as a conservation cost, but as a high-value commercial service. We conducted a situational analysis demonstrating the massive economic losses caused by the "flood-drought" cycle. This allowed us to build a powerful cost-benefit analysis, showing that proactive investment in restoring the watershed's natural infrastructure offers a vastly higher ROI than the perpetual cost of inaction (disaster relief, infrastructure repair, lost agricultural productivity). This service is designed to be sold to downstream beneficiaries who are economically impacted by water scarcity and volatility.
  2. An Innovative Financing Mechanism (The "Sustainable Flywheel"): This is a blended finance model designed to fund the restoration work and ensure its long-term financial sustainability. It moves beyond traditional grants by creating a diversified portfolio of revenue streams:
    • Performance-based Contracts: Securing multi-year contracts from anchor partners (corporations, DFIs) who pay for the delivery of pre-agreed, verifiable outcomes (e.g., hectares restored, cubic meters of water retained).
    • Payments for Ecosystem Services (PES): Developing long-term payment schemes with downstream water users (e.g., municipalities, large-scale agriculture) who benefit from the improved water regulation.
    • Sale of High-Integrity Environmental Assets: Monetizing the carbon and biodiversity credits generated from the large-scale restoration work.
    • Sale of Sustainable Commodities: Marketing the nature-positive products (e.g., from agroforestry) that provide sustainable livelihoods for community partners.

The entire process was developed through a multi-stakeholder approach. We have secured foundational agreements with the regional government and built a deep partnership with the Federation MIHAVAO, which represents the local communities. This ensures the project is not just technically sound, but co-designed and owned by the people it is meant to serve, with a strong focus on including women and youth in the "Ecosystem Guardian" workforce.

Outcomes

While the Onilahy Watershed Initiative is at the "pilot-ready" stage, its designed outcomes are based on a proven methodology and are rigorously modeled. The project is designed to deliver a powerful portfolio of results that directly address the drought crisis.

  • Projected Quantitative Results:
    • Enhanced Water Resilience: The restoration of 50,000 hectares of the watershed is projected to increase the landscape's water retention capacity by over 20 million cubic meters, ensuring more reliable river flow during the dry season and mitigating the impact of drought.
    • Reduced Erosion: The interventions are designed to reduce soil erosion by up to 60% in the target sub-catchments, which will decrease the sediment load that chokes rivers and damages infrastructure.
    • Improved Food Security: The transition to regenerative agriculture is projected to increase crop yields by 30-40% for over 10,000 households, directly enhancing their resilience to drought-induced food shortages.
    • Sustainable Livelihoods: The project will create over 200 full-time "Ecosystem Guardian" roles and provide diversified, nature-positive income streams for thousands of community members.
  • Impact of the Action: The most significant impact of this case study is the creation of a replicable financial blueprint for drought resilience. By proving that watershed restoration can be structured as an investable, revenue-generating enterprise, we will create a new market for nature-based solutions. This has the potential to influence national policy by demonstrating a viable alternative to costly, centralized water infrastructure and a more effective, proactive alternative to reactive humanitarian aid.
  • Sustainability & Resources: The project's sustainability is its core design principle. The "Sustainable Flywheel" is engineered to ensure that after the initial catalytic funding, the project can be self-sustaining through its diversified, commercial revenue streams. This breaks the cycle of grant dependency and ensures that the positive changes will be managed and maintained for the long term. The primary winners are the local communities, who gain resilient livelihoods and a stable environment. There are no direct losers; the project is designed to create shared value across the entire landscape.
Lessons Learned

Lesson 1: Proactive investment in watershed regeneration offers a vastly higher economic ROI than reactive, costly crisis management for drought and floods.

Lesson 2: Innovative, blended finance models like the "Sustainable Flywheel" are essential to unlock private and institutional capital for drought resilience at the required scale.

Lesson 3: True drought resilience is impossible without deep community partnership; local communities must be the primary economic actors and beneficiaries of regeneration.

Lesson 4: Combining "high-tech" (AI, sensors) for verification with "high-touch" community engagement de-risks investment and ensures long-term, permanent impact.

Lesson 5: Framing landscape restoration as a commercial service ("Watershed Resilience as a Service") creates a new, viable market for nature-based solutions.

This case study has been submitted as part of: "Investing in Drought Resilience".
Corresponding Author
Rakotondrasoa, Fenohery
Corresponding Author Contact
fenohery@naturelead.org
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