Flooding is among the largest economic costs of climate change and vulnerable communities in some of the poorest countries are particularly badly affected. Community‐planned interventions to build resilience to floods following climate shocks and stresses play a role in major global development programmes but evidence on their costs and benefits is limited. This paper presents a way of combining evidence from participatory methods to understand changes that have occurred with more formal economic modelling and can be widely used for community‐planned interventions to tackle flooding. We consider projects in flood‐affected communities in Myanmar implemented as part of the Department for International Development‐funded Building Resilience and Adaptation to Climate Extremes and Disasters programme and find estimated economic benefits over a 10‐year period (based on 12–18 months of postintervention data) are significantly greater than estimated costs. The highest returns accrue to relatively small‐scale infrastructure investments planned with communities and local government, drawing on donor finance with community contributions of labour.

中文翻译：

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评估建立社区抗洪能力的经济收益

洪水是气候变化的最大经济成本之一，在一些最贫穷的国家中，脆弱的社区受到的影响尤其严重。在主要的全球发展计划中，由社区计划的干预措施可增强抗洪能力以应对洪水和洪水的影响，但有关其成本和收益的证据有限。本文提出了一种将参与式方法的证据结合起来的方法，以了解更正式的经济模型所发生的变化，并且可以广泛用于社区计划的干预措施，以应对洪水。我们考虑在缅甸受洪水影响的社区中实施的项目，这些项目是国际发展部资助的“建筑抗灾能力和适应极端气候和灾害”计划的一部分，并在10年内估算了经济收益（基于12到18个月的估算）干预后的数据）远远大于估算的费用。最高的回报归功于与社区和地方政府计划的相对较小规模的基础设施投资，这要依靠捐助者的资金和社区的劳动贡献。