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Costa Rica is addressing climate-driven water deficits in the Reventazón River basin by constructing farm-level water reservoirs. This initiative, part of the National Climate Change Adaptation Plan 2022–2026, aims to protect vegetable production and hydroelectric generation by improving irrigation efficiency and rainwater harvesting. The project emphasizes interinstitutional coordination and community participation, with plans to scale from a pilot to approximately 100 reservoirs over the next three years to secure livelihoods and national food security.

The document details a climate adaptation initiative in Costa Rica's Reventazón River basin, where changing precipitation patterns have created water deficits of up to 30%. To combat drought and ensure food security, the government and local partners are implementing the National Adaptation Plan (PNA) 2022–2026, specifically through the construction of water reservoirs on agricultural farms. These reservoirs allow farmers to maintain year-round production, optimize irrigation, and reduce agrochemical use. The project emphasizes inter-institutional coordination and community participation, with plans to scale the model to approximately 100 reservoirs over the next three years using public and international funding.

The Nature-Based Infrastructure (NBI) Global Resource Centre assessed the economic viability of nature-based interventions in Costa Rica's Reventazón River basin. The analysis indicates that a pilot project involving reforestation, agroforestry, and contoured croplands would yield a net benefit of USD 3.17 million, with a return of USD 1.23 for every dollar invested. A scaled-up, basin-wide approach is estimated to generate a net benefit of USD 6.31 million over 30 years.